Trunk Signaling. Figure 1 Subscriber Loop Signaling and Trunk Signaling

Size: px
Start display at page:

Download "Trunk Signaling. Figure 1 Subscriber Loop Signaling and Trunk Signaling"

Transcription

1 Signaling

2 Overview Signaling is the step by step process of completing a telephone call. For example, when you make a telephone call, you lift the handset off of the telephone cradle (known as going off the hook). This sends a signal to a switch located at the telephone company. f the phone company has enough available circuits to proceed with the call, a signal is sent back to you, with a dial tone, to proceed. A generic telephone system has two major components, the user or subscriber side and the trunk or switch side. Signaling occurs between a telephone and a switch (subscriber side signaling) or between two switches (trunk side signaling). The subscriber side consists of the telephone and the wires that connect it to a Private Branch xchange (PBX) or to a switch in a Central Office. This configuration is called the subscriber loop. telephone to ring, and a hybrid to convert from two wire to four wire. The simple act of lifting a handset off the cradle and dialing a telephone number involves a series of signals exchanged between the telephone and the switch or PBX. Signaling Types As indicated, signaling can occur between a telephone and a switch (subscriber loop signaling), or between switches (trunk signaling). While either type can be analog or digital, only analog signaling between a phone and a switch, and both analog and digital signaling between switches are examined in this document. Subscriber Loop Signaling Trunk Signaling PBX or Switch PBX or Switch The phone may be analog or digital, but for the purpose of this paper, only the analog interface is examined. The phone has various components that include a transmitter, a receiver, a switch hook (activated / deactivated by the button in the handset cradle), a dialer (either rotary or push button), a ringer, and a hybrid (two to four wire converter). Figure 1 Subscriber Loop Signaling and Trunk Signaling n general, there are four types of important signals. /onhook or line seizure signaling, which provides information about the status of the loops or trunks. Start dial supervision. Address signaling, which provides information to the switches about the call destination. The switch (or PBX) has various components which interface to an analog telephone including a battery to nformational signaling, which provides information operate the telephone, a current detector to detect onhook/offhook to subscribers about the call progress. transitions, a dial register to store dialed numbers, a tone generator for tones (dial tone and busy signals), a ring generator to cause an attached Signaling Page 2

3 Line Seizure Signaling Line seizure signaling provides information about the status of the loop or trunk. On the subscriber side, the loop can either be idle (onhook) or active (offhook). When directly connected to a telephone (or FAX), Hypercom provides support for loopstart signaling on the subscriber side. Loopstart is the most popular interface for subscriber side signaling. On Hook - dle Switch Opened When a subscriber lifts the handset off the cradle, the switch hook closes allowing a current supplied by the PBX or switch to flow through the loop. Two wires are used to implement the circuit. The wire carrying -48Vdc from the switch to the telephone is called RG. The wire returning to the switch from the phone is called TP. At the switch, the current detector monitoring the TP wire attempts to seize a trunk line and initiates a response with informational signaling (dial tone or fast busy) based on the trunk seizure success. When the handset is replaced, the hook switch opens and the current stops flowing, signaling that the circuit has now gone idle. RG TP -24 or -48Vdc Detector Loopstart signaling circuitry in this case is asymmetric (a -24 or -48Vdc battery located at the PBX/switch and a hook switch at the telephone). Telephone PBX or Switch One of the advantages of a loopstart circuit is no requirement for accurate ground references between the switch and the telephone. Off Hook - Active Switch Closed Telephone RG Subscriber Side Signaling - Loopstart TP Flow Figure 2 Subscriber Side - Loopstart Signaling -24 or -48Vdc Detector A disadvantage of loopstart is poor "glare" resolution. Glare occurs when both the local end and the remote end attempt to seize a trunk at the same time. Unfortunately, with loopstart, the telephone is not informed of an inbound seizure until ringing is detected. An additional concern caused by loopstart implementations is no far end disconnect supervision. When one end hangs up, the circuit is not terminated until the remote end also hangs up. Because of these limitations, loopstart is rarely used in switch to switch signaling. PBX or Switch Loopstart is used almost exclusively on subscriber loops (telephone to switch signaling) and is the simplest and most inexpensive form of signaling to implement. Signaling Page 3

4 Trunk Side Signaling 2 or 4 Wires for Voice (2w &M / 4w &M) On the trunk side, there are a number of possible line seizure signaling interfaces, such as: Loopstart Ground Start &M Type &M Type &M Type &M Type V Supported by OT Supported by Supported by Supported by OT Supported by Supported by Loopstart Loopstart is a simple switch activated circuit that provides current when a circuit or trunk is requested. Because of the concerns about glare and far end disconnect supervision, loopstart is rarely used for switch to switch (PBX to ) signaling. &M Signaling &M is the most frequently used analog signaling scheme for switch to switch line seizure signaling. &M is the short familiar form of ar and Mouth. The name comes from telephone circuit diagrams where the receive line was known as ar (listen) and the transmit line was known as Mouth (talk). &M uses separate circuits (wires) for signaling and voice, unlike loopstart which uses the same wires for voice and signaling. The voice path can be carried over two wires (2 wire &M) or four wires (4 wire &M). There are additional wires used for signaling in &M. The voltages for signaling wires in &M can be either -48Vdc or -24Vdc. &M Type n &M type, the battery for both the and M leads is supplied by the PBX to the line or transmission equipment. n the idle, on hook position, the M lead is grounded at both ends. (OT: the voltage on the and M leads may not be identical). PBX Detect Mouth Lead ar Lead Figure 3 &M Type The onhook condition is represented by the M lead in the grounded position and the lead in the open (not grounded) position. is represented by the M lead attached to battery and the lead grounded. ven though &M Type is the most commonly used signaling interface in orth America, it has potential drawbacks. f two PBXs are improperly grounded, a difference can exist in the ground potential between the PBX and the signaling equipment. This can even occur when equipment is located on different floors of the same building. can flow down the M signaling lead, the remote PBX can detect current flow on the lead and can lead to a false seizure of the trunk. This is the most common installation problem with &M Type. Because of the difference in grounds, and the amount of current needed before current flow can be detected, faulty grounds can cause sporadic and unusual problems. Additionally, as an asymmetric signaling scheme (battery supplied by one end only), there is a potential for noise interference. &M Type V Detect Line quipment &M type V is the TU-T standard for &M signaling and is the most popular interface outside orth America. Both the PBX and the line equipment supply battery. While the interface does not provide isolation between power systems, there are minimal return currents in this symmetrical signaling scheme and therefore interference and false seizures are greatly reduced. Signaling Page 4

5 The onhook condition is represented by the and M leads being in the open (not grounded) position. is represented by both leads being grounded. Detect 2 or 4 Wires for Voice (2w &M / 4w &M) ar Lead Hypercom supports: Wink start mmediate start Delay start The following section details the trunk side signaling that takes place after an line seizure signal (offhook condition) is detected and prior to output of digits over the trunk circuit to the remote switch. SUBSCRBR SD Start Dial Signaling On the subscriber side, the switch/pbx presents a dial tone to the attached telephone (or FAX) to indicate that dialing may proceed. f the switch is unable to seize a line, a fast busy (reorder) is presented. (Dial tone and fast busy are defined in informational signaling.) TRUK SD PBX Mouth Lead Figure 4 &M Type V Detect Line quipment WK START Wink start operation is the most commonly used trunk signaling type. n wink start operation, the originating trunk circuit goes offhook. The remote switch detects the offhook signal, transmits an offhook pulse that is between 140 and 290ms in length, and returns to the idle (onhook) state. This wink on the lead is only sent after the switch has determined that it can seize a line. The originating trunk detects the wink back, waits for at least 210ms and outputs digits to the remote switch. When the call is answered, the terminating switch indicates this by an offhook condition. After the call completion and the current is in wink mode, the polarity on both &M leads reverts to the onhook condition. Because many phones (subscriber side) are attached to a single PBX and this PBX typically has fewer trunk side connections, there is contention for available trunk lines. ither the PBX or switch can contend for an available trunk line. The potential for glare and double ended seizures exists. To alleviate the potential for glare, the calling PBX may receive a double acknowledgment from the remote PBX. There are a number of protocols, known as the start protocols, designed to reduce the problems caused by glare. These protocols provide end-to-end seizure of a trunk line. These protocols are put into action after detecting an offhook condition. MMDAT START With immediate start operation, the originating trunk circuit goes offhook, and maintains this condition for at least 150ms. The originating trunk then blindly outputs digits (address signaling). Using the figure 6 implementation of immediate start, there is no protection against glare (where both ends seize the line then send digits simultaneously). DLAY DAL Delay dial is similar to wink start when the lead timing sequence is examined. The main differences are the offhook state is signaled immediately by the receiver, and the return to onhook state (equated as permission for the originator to proceed with address signaling) is Signaling Page 5

6 delayed until the receive digit register is found. f the remote switch is not ready to receive digits, improper call completion can result. The offhook condition must be present for a minimum of 140ms. The offhook to onhook transition must not occur for at least 210ms after the offhook condition. M - Lead - Lead Wait At least 150 ms Line Seizure Forwarded (Address Signalling) Called umber Answers Address Signaling Address signaling is used by the caller to control and direct the switching system. The network obtains and transfers that information by address signaling. M - Lead Line Seizure Figure 6 mmediate Start Protocol Forwarded (Address Signalling) The most commonly used methods of address signaling are dial pulse and Dual Tone MultiFrequency (DTMF) signaling. Dial pulse signaling is most closely associated with rotary dial phones while DTMF signaling is most often supported on a push button telephone. Hypercom only supports DTMF signaling. - Lead M - Lead - Lead Wink Line Seizure Forwarded (Address Signalling) Receive Register Found Called umber Answers Figure 5 Wink Start Protocol Called umber Answers DTMF (Dual Tone Multiple Frequency) signaling consists of two tones (dual tone), combinations of which are transmitted depending upon the signaling digit. The keypad is composed of 12 keys. For each row of keys, there are individual low frequency tones, while each column is represented by a different high frequency tone. By pressing key, the switch receives a digit represented by both a low and high frequency tone. For example, the number "5" is represented by a 770 and 1336Hz tone. The following matrix describes the tone pairs used for the keypad digits. Figure 7 Delay Start Protocol Signaling Page 6

7 Col. 1: 1209Hz Col. 2: 1336Hz Col. 3: 1477Hz Row 1: 697Hz Row 2: 770Hz Row 3: 852Hz Row 4: 941Hz * 0 # Figure 8 DTMF Frequencies ote: The keypad has been standardized but the tone tolerances may vary. n the U.S., the tone generators should be within a 1.5% tolerance, while the switch ignores any tone that exceeds a tolerance of 3.5%. Within the orth American phone system, telephone companies often support the use of the octothorpe (#) to end the interdigit time-out period. This allows calls to be processed faster if the dialing digits are immediately followed by the "#" stop-dial signal. A RS-470 specifies that DTMF generators utilize the following levels: Per Frequency: +6dBm to - 4dBm Per Frequency Pair: +2dBm For automatic dialing, the minimum digit cycle time is specified as 100ms. The duration of the DTMF signal must be at least 50ms, and the minimum interdigit interval is specified as 45ms. The maximum interdigit interval is 3 seconds. DTMF receivers should register digits with ontime as short as 40ms. While there is no requirement to bridge a gap in the DTMF tone, the DTMF receiver must recognize 40ms of no tone as an interdigit interval. t should be noted that some receivers may recognize 20ms of no tone as an interdigit interval. Hypercom has a built-in DTMF detector/generator that complies with A RS-470 for transmit and receive functionality. nformational Signaling nformational signaling is simply the collection tones and recorded messages used by the network to inform the user of the progress of the call. The informational signals users are most familiar with are busy signal, fast busy, dial tone, and ring back. These signals are composed of precise tones generated at specific cadences. The audible tones most commonly used in orth America are as follows: Dial tone is a composed of two tones (dual tone) and is defined as Hz continuous. t is an indication that the switch/pbx is ready to receive address digits. Ring back tone is defined as a dual tone Hz with a pattern of 2 second on and 4 seconds off. The ring back tone allows the call initiator to know that the remote telephone is in the process of ringing. Busy signal is also a dual tone signal represented by Hz. t has a defined pattern of 0.5 seconds on and 0.5 seconds off. The busy signal is used as an indication that call could not be completed because the phone at the remote end is busy. Fast busy signal is an indication that a trunk line was not available for the call. t is represented by the frequency pair of Hz and has a pattern of 0.2 seconds on and 0.3 seconds off. Ringing is another form of informational signaling. To ring the attached phone, the outputs a 86Vac 20Hz down subscriber loop to drive a bell in the phone. The cadence of the ringing is 2 second on and 4 seconds off. Digital Signaling Digital links have become very popular for a number of reasons, including high numbers of user per physical ports (a T-1 circuit can carry 24 voice calls simultaneously) and better quality voice call (no line loss problems). There are two methods to transfer signaling information over digital lines, Channel Associated Signaling and Common Channel Signaling. Signaling Page 7

8 Channel Associated Signaling (CAS) is also known as Robbed Bit Signaling. n this method, certain bits within the voice circuits are robbed and used to transfer signaling information. n the Common Channel Signaling method, a single channel is dedicated to signaling information, which allows all bits within a user s payload to remain untouched. This is very important for data calls, but has little impact on the quality experienced by a voice user. Hypercom supports Robbed Bit/Channel Associated Signaling only. n the previous section four types of signaling are described: line seizure signaling, start dial supervision, address signaling, and informational signaling. The digital signal of interest is the line seizure signaling. ach type of line seizure signaling supported by Hypercom (loopstart and &M) has its own set of signaling states. ach of these states is represented by a specific digital pattern. For example, &M has only two states, idle and busy, but loopstart must convey multiple states, including loop open, loop closed, ring present, and ring removed. Because of the multiple states, loopstart signaling requires two signaling bits. n a D4 SF, every 6th and 12th frames have the Least Significant Bit (LSB) from every 8-bit word overwritten to indicate the hook state. To differentiate between the signal bits, the signal bits in the 6th frame are referred to as the A-bit while the signal bits in the 12th the frame are the B-bits. n SF, there are also signal bits in frames 18 and 24. These are labeled as the C and D-bits respectively. When a PBX places an outbound call, it picks-up the line by asserting the A-bit. Upon the A-bit transition, the line equipment raises its A-bit for a short period of time, then drops it. This is called the wink. When the A-bit drops from the line equipment, the PBX dials the desired numbers and perform call progress. When the remote end has answered the line, the line equipment asserts its A-bit to indicate call connection. When the call has ended, both ends drop their A-bits. DS-1 &M Signaling &M is a two-state signaling scheme (onhook/offhook) commonly used on switch to switch connections. As only one bit is required, the signaling state is transmitted by A-bit signaling. The B-bit (or B, C, D-bits in the case of SF) follows the same state as the A-bit. Tx Rx M-Lead A B A B -Lead Onhook * Onhook * Rx Tx -Lead A B A B M-Lead Onhook 0 * 0 0 Onhook 1 * 1 1 Figure 9 Two-State Signaling Scheme DS-1 Foreign xchange Signaling Ground start and loopstart use signaling states used within Foreign xchange Station (FXS) and Foreign xchange Office (FXO) modules. This signaling supports two-wire FX (Foreign xchange) trunk and OPX (Off-Premise xtensions) applications. Foreign xchange Office (FXO) modules provide analog circuit connection to a central office, while Foreign xchange Station (FXS) modules provide analog circuit interconnection to a station (telephone or PBX trunk). These signaling methods require four-state signaling, so both the A and B-bits are used to represent these signaling states. (n the case of SF, the C-bit follows the state of the A-bit and the D-bit follows the state of the B-bit). Signaling Page 8

9 FXO Transmit States Tx Rx A B A B FXS Receive States o Ringing * o Ringing Ringing * Ringing Rx Tx FXO Receive States A B A B FXS Transmit States Loop Open 0 * 0 0 Loop Open Loop Closed 1 * 1 1 Loop Closed Figure 10 Four-State Signaling Scheme For -1 lines, channel 16 is used for CAS signaling. MultiFrame 0 Time slot 16 is set to 0000 XYXX. This is known as the MultiFrame Alignment Signal (MFAS), the signaling reference point for the multiplexers. n Multiframe 1, the 16 time slot is used to convey the signaling states for the first channels, channels 1 and 16. The first nibble (four bits) is used for ABCD signaling bits of channel 1, while the second nibble is used for the signaling bits from channel 16. Multiframe 2 time slot 16 transports the signaling bits for channel 2 and 17. The first nibble is for channel 2, while the second nibble is for channel 17. The pattern repeats itself, 3 and 18, 4 and 19, up through channels 15 and 30. The pattern then repeats itself, MFAS, channel 1 and 16, channel 2 and 17 through channel 15 and 30. otice that since 0000 is the alignment signal, a signaling pattern of all zeros is illegal. Signaling Sequences Through an etwork There are three possible paths for voice connectivity through an network. ither a telephone handset or PBX/Key system is connected to the device. The signaling flow for these three combinations are represented in the diagrams below. These signal flows are valid with optioning through release 1 voice. Handset - Handset Call Setup through two s FR Call Request Ring Connection stablished Figure 11 Handset Call Setup Through Two s Signaling Page 9

10 PBX - Handset Call Setup through two s FR P B X Call Request Ring Connection stablished Figure 12 PBX- Handset Call Setup Through Two s PBX- PBX Call Setup through two s P B X FR P B X Loop, immediate or wink start Response to above Call Request Ring Connection stablished Figure 13 PBX - PBX Call Setup Through Two s Signaling Page 10

11 2851 West Kathleen Road Phoenix, AZ (800) (within the U.S.A.) (602) FAX ( mail: Web Site: Signaling Printed in the U.S.A. July, 1997 Document umber Version 1.1 Copyright 1997, Hypercom Corp. All rights reserved. The ntegrated nterprise etwork is a trademark and Hypercom and the Hypercom logo are registered trademarks of Hypercom Corp. All other products or services mentioned in this document are trademarks, service marks, registered trademarks of their respective owners.

Vanguard Managed Solutions. Understanding Voice Technology - Vanguard Technical Reference

Vanguard Managed Solutions. Understanding Voice Technology - Vanguard Technical Reference Vanguard Managed Solutions Understanding Voice Technology - Vanguard Technical Reference Notice 2003 Vanguard Managed Solutions, LLC 575 West Street Mansfield, Massachusetts 02048 (508) 261-4000 All rights

More information

Traditional Telephony

Traditional Telephony Traditional Telephony Basic Components of a Telephony Network This topic introduces the components of traditional telephony networks. Basic Components of a Telephony Network 3 A number of components must

More information

Configuring the 930A for Common PBX Metallic Signaling Interfaces

Configuring the 930A for Common PBX Metallic Signaling Interfaces Product: 930A Communications Test Set APPLICATION NOTE # Configuring the 930A for Common PBX Metallic Signaling Interfaces TABLE OF CONTENTS Introduction...1 Primer...1 LOOP START...2 General...2 Trunk

More information

Configuring the ADTRAN ATLAS for a Rabbit-Hole Application

Configuring the ADTRAN ATLAS for a Rabbit-Hole Application Configuring the ADTRAN ATLAS for a Rabbit-Hole Application Description: This configuration allows an ADTRAN ATLAS to convert PRI to FXS and pass ANI/DNIS information as DTMF digits toward a receiver in

More information

Curso de Telefonía IP para el MTC. Sesión 4-1 Tipos de llamadas. Mg. Antonio Ocampo Zúñiga

Curso de Telefonía IP para el MTC. Sesión 4-1 Tipos de llamadas. Mg. Antonio Ocampo Zúñiga Curso de Telefonía IP para el MTC Sesión 4-1 Tipos de llamadas Mg. Antonio Ocampo Zúñiga Call Types Local: Does not traverse the WAN or PSTN. On-net: Occurs between two telephones on the same data network.

More information

PATTON TECH NOTES What are FXS and FXO?

PATTON TECH NOTES What are FXS and FXO? Introduction The question What is the difference between FXS and FXO? is frequently asked by those deploying Patton Voice-over-Internet Protocol (VoIP) SmartNode solutions. Foreign exchange Subscriber

More information

Telecommunications Switching Systems (TC-485) PRACTICAL WORKBOOK FOR ACADEMIC SESSION 2011 TELECOMMUNICATIONS SWITCHING SYSTEMS (TC-485) FOR BE (TC)

Telecommunications Switching Systems (TC-485) PRACTICAL WORKBOOK FOR ACADEMIC SESSION 2011 TELECOMMUNICATIONS SWITCHING SYSTEMS (TC-485) FOR BE (TC) PRACTICAL WORKBOOK FOR ACADEMIC SESSION 2011 TELECOMMUNICATIONS SWITCHING SYSTEMS (TC-485) FOR BE (TC) Department of Electronic Engineering NED University of Engineering and Technology, Karachi LABORATORY

More information

Module 2 Communication Switching. Version 1 ECE, IIT Kharagpur

Module 2 Communication Switching. Version 1 ECE, IIT Kharagpur Module 2 Communication Switching Lesson 2 Circuit Switching INSTRUCTIONAL OBJECTIVES GENERAL This lesson is aimed at developing the concept and application of circuit switching which is a very important

More information

Miniature Surface-Mount DAA for Audio or Data Transfer XE0402LCC BLOCK DIAGRAM

Miniature Surface-Mount DAA for Audio or Data Transfer XE0402LCC BLOCK DIAGRAM XE0402LCC January 2007 Miniature Surface-Mount DAA for Audio or Data Transfer Description The XE0402LCC supplies a complete telephone line interface or DAA (Data Access Arrangement) in a miniature, surface-mount

More information

Loop Start or Ground Start?

Loop Start or Ground Start? Fire Alarm Notebook by Dean K. Wilson. P.E. Page 1 Loop Start or Ground Start? by Dean K. Wilson, P.E. Question: The new telephone system installed in our office building has telephone voice mail. To signal

More information

Peer-to-Peer SIP Mode with FXS and FXO Gateways

Peer-to-Peer SIP Mode with FXS and FXO Gateways Peer-to-Peer SIP Mode with FXS and FXO Gateways New Rock s SIP based VoIP gateways with FXS and FXO ports support peer-to-peer mode which has many applications in deploying enterprise multi-site telephone

More information

APPLICATION NOTE # Using Sage SMOS for VoIP Testing, IP Phone to IP Phone TABLE OF CONTENTS

APPLICATION NOTE # Using Sage SMOS for VoIP Testing, IP Phone to IP Phone TABLE OF CONTENTS Product: 930A L3 Communications Test Set 935AT Communications Test Set APPLICATION NOTE # Using Sage SMOS for VoIP Testing, IP Phone to IP Phone TABLE OF CONTENTS Introduction... 2 Configuring 935AT #1

More information

Page no. 1 (12) Public

Page no. 1 (12) Public 1 (12) DESCRIPTION OF NETWORK INTERFACES ; Digital interface for connection of digital PBXs to PSTN ; Signalling characteristics (System P7) ; Traffic direction PSTN PBX Contents page 1 Introduction...2

More information

Call Routing through Analog Voice Ports and Issues at the Analog Voice Ports Connection Points

Call Routing through Analog Voice Ports and Issues at the Analog Voice Ports Connection Points International Journal of Information & Computation Technology. ISSN 0974-2239 Volume 4, Number 14 (2014), pp. 1373-1378 International Research Publications House http://www. irphouse.com Call Routing through

More information

Section 11. 4-wire E&M/TO Configuration. 4-Wire E&M/TO Voice Card. About This Section. Functional Description. Physical Description

Section 11. 4-wire E&M/TO Configuration. 4-Wire E&M/TO Voice Card. About This Section. Functional Description. Physical Description Section 11 4-wire E&M/TO Configuration About This Section This section describes how to configure the 4-wire E&M/Transmission Only (E&M/TO) 12-channel voice card for connecting the Access Bank II to T1

More information

2-Wire/4-Wire Telephone Line Interface. XE0204 Block Diagram

2-Wire/4-Wire Telephone Line Interface. XE0204 Block Diagram XE0204 July 2000 2-Wire/4-Wire Telephone Line Interface Description The XE0204 provides a common telephone interface for networks integrating two and four-wire telephone connections. The XE0204 supplies

More information

FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below:

FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below: FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below: Title: Signaling System #7 Second Edition Author: Travis Russell Publisher:

More information

Overview of the Telecommunications Network

Overview of the Telecommunications Network 1 Overview of the Telecommunications Network 15 Telecommunication Networks 2 Basic purpose of a telecommunications network: transmit user information in any form to another user of the network. Many forms

More information

Operation Manual Voice Overview (Voice Volume) Table of Contents

Operation Manual Voice Overview (Voice Volume) Table of Contents Operation Manual Voice Over (Voice Volume) Table of Contents Table of Contents Chapter 1 Voice Over... 1-1 1.1 Introduction to VoIP... 1-1 1.1.1 VoIP System... 1-1 1.1.2 Basic VoIP Call Flow... 1-2 1.1.3

More information

FAST TUTORIALS FOR TIME-CHALLENGED TECHNICIANS

FAST TUTORIALS FOR TIME-CHALLENGED TECHNICIANS Tech Notes from a Telephone Engineer FAST TUTORIALS FOR TIME-CHALLENGED TECHNICIANS POTS Dialtone Description: POTS Plain Old Telephone Service Long held industry acronym for standard dialtone service

More information

International Civil Aviation Organization

International Civil Aviation Organization International Civil Aviation Organization ATNICG WG/8-IP/3 AERONAUTICAL TELECOMMUNICATION NETWORK IMPLEMENTATION COORDINATION GROUP EIGHTH WORKING GROUP MEETING (ATNICG WG/8) Christchurch New Zealand 28

More information

Special-Purpose Connections

Special-Purpose Connections Special-Purpose Connections Connection Commands This topic identifies different special-purpose connection commands. Special-Purpose Connection Commands connection plar Associates a voice port directly

More information

Citynet Telephone Features

Citynet Telephone Features Citynet Telephone Features Feature Activate De-Activate NOTES Activation/De-Activation Calling Number Calling Name Caller ID Block *67 Caller ID unblock *82 Call reject *77 *87 Call Waiting *70 Calling

More information

The Telephone Network

The Telephone Network ch02.qxd 10/17/00 9:14 AM Page 15 2 The Telephone Network INTRODUCTION This chapter provides an introduction to the telephone network, known in telephony circles, as The Network. Some people use the term

More information

(Refer Slide Time: 2:10)

(Refer Slide Time: 2:10) Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture-12 Multiplexer Applications-1 Hello and welcome to today s lecture on multiplexer

More information

Fundamentals of Telecommunications

Fundamentals of Telecommunications Fundamentals of Telecommunications Professor of CIS Columbus, OH 43210 Jain@ACM.Org http://www.cis.ohio-state.edu/~jain/ 1 Overview Time Division Multiplexing T1, T3, DS1, E1 T1 Framing Echo Cancellation

More information

Configuring Analog and Digital Voice Interfaces

Configuring Analog and Digital Voice Interfaces Configuring Analog and Digital Voice Interfaces Foreign Exchange Station Ports (FXS) FXS ports connect analog edge devices. This topic identifies the parameters that are configurable on the FXS port. FXS

More information

Analog Access to the Telephone Network

Analog Access to the Telephone Network Telecommunications Telephony Analog Access to the Telephone Network Courseware Sample 32964-F0 Order no.: 32964-00 First Edition Revision level: 01/2015 By the staff of Festo Didactic Festo Didactic Ltée/Ltd,

More information

Telephony Systems Trainer CODITEL

Telephony Systems Trainer CODITEL Technical Teaching Equipment Telephony Systems Trainer CODITEL Always included in the supply: Teaching Technique used EDIBON Computer Control System 2 Computer Control Software Computer (not included in

More information

Application Note: Extending a TSP s Analog Capabilities Using an Access Bank I

Application Note: Extending a TSP s Analog Capabilities Using an Access Bank I 22116 23 rd Drive SE Bothell, WA 98021-4413, USA Toll free 800-426-3926 425-487-1515 Fax 425-487-2288 E-mail info@teltone.com www.teltone.com Application Note: Extending a s Analog Capabilities Using an

More information

AA9604 Auto Attendant

AA9604 Auto Attendant AA9604 Auto Attendant Operation Manual 10AA96V4M.2.13.EN1 DSG, DSG logo, AA9604, VL880, VL880L, IM1200, IM2400, IL1000 and IL5000 are trademarks of DSG Technology. Windows and Outlook Express are trademarks

More information

An ADTRAN White Paper. Integrating LAN Fax Servers over T1 and PRI Services

An ADTRAN White Paper. Integrating LAN Fax Servers over T1 and PRI Services An ADTRAN White Paper Integrating LAN Fax Servers over T1 and PRI Services Migration to LAN Fax Servers Introduction While many may argue that the universal acceptance of electronic mail has all but replaced

More information

Low Speed Modems for Dial and Leased Circuits 2400E-2 (Stand Alone) 2400R-2 (Rack Mount) 2400E-4 (Stand Alone) 2400R-4 (Rack Mount)

Low Speed Modems for Dial and Leased Circuits 2400E-2 (Stand Alone) 2400R-2 (Rack Mount) 2400E-4 (Stand Alone) 2400R-4 (Rack Mount) Low Speed Modems for Dial and Leased Circuits 2400E-2 (Stand Alone) 2400R-2 (Rack Mount) 2400E-4 (Stand Alone) 2400R-4 (Rack Mount) QUALITY COMMUNICATIONS PRODUCTS Made in the U.S.A. 11-1010-002 INTRODUCTION

More information

Dual-tone multi-frequency signaling

Dual-tone multi-frequency signaling Dual-tone multi-frequency signaling One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual-tone

More information

ADA COMPLIANT BOX STYLE TELEPHONE INSTALLATION, PROGRAMMING AND OPERATING INSTRUCTIONS FOR MODEL PBX

ADA COMPLIANT BOX STYLE TELEPHONE INSTALLATION, PROGRAMMING AND OPERATING INSTRUCTIONS FOR MODEL PBX ADA COMPLIANT BOX STYLE TELEPHONE INSTALLATION, PROGRAMMING AND OPERATING INSTRUCTIONS FOR MODEL PBX INSTALLATION INSTRUCTIONS Step 1. Determine the position for the Hands-free phone in the elevator phone

More information

Manufactures of: All. Dallas Delta Corporation Pty.Ltd. Pty.Ltd. 102 Albert St. East Brunswick, 3057 Vic. Tel: 613 93877388 Fax: 613 93873128

Manufactures of: All. Dallas Delta Corporation Pty.Ltd. Pty.Ltd. 102 Albert St. East Brunswick, 3057 Vic. Tel: 613 93877388 Fax: 613 93873128 Dallas Delta Corporation Pty.Ltd. 102 Albert St. East Brunswick, 3057 Vic. Tel: 613 93877388 Fax: 613 93873128 Email: sales@dallasdelta.com.au www.dallasdelta.com.au LP GUARD DOORSTATION MK II G UARD Doorstation

More information

Inbound Routing with NetSatisFAXTion

Inbound Routing with NetSatisFAXTion Inbound Routing with NetSatisFAXTion Routing Terms DID Direct Inward Dialing (DID) is a service of a local phone company (or local exchange carrier) that provides a block of telephone numbers for calling

More information

DWIatt2 USER'S GUIDE

DWIatt2 USER'S GUIDE DWIatt2 USER'S GUIDE Copyright 1998 by KONEXX, Unlimited Systems Corporation, Inc. San Diego, CA. The KONEXX DWIatt2 (Digital Wall Interface) easily connects to your Lucent Definity, or ProLogix Solutions

More information

LinkPlus Interface Guide

LinkPlus Interface Guide Panasonic Digital Business System (DBS) LinkPlus Interface Guide SpectraLink 6000 System SpectraLink 8000 System July 2008 Edition 1725-36141-001 Version E LinkPlus Interface Guide: Panasonic Digital Business

More information

MG4 & MG8 Series Gateway Setup Manual

MG4 & MG8 Series Gateway Setup Manual July 11 MG4 & MG8 Series Gateway Setup Manual Author: Zultys Technical Support Department This document covers basic set up of the following Media Gateway models MG4/S, MG8/S, MG4/O, MG8/O, MG8/SO (MG

More information

Tech Note. Introduction. Definitions. What are FXS and FXO?

Tech Note. Introduction. Definitions. What are FXS and FXO? Tech Note What are FXS and FXO? Introduction The question What is the difference between FXS and FXO? is frequently asked by those deploying Patton Voice-over-Internet Protocol (VoIP) SmartNode solutions.

More information

NOKIA 32 SUPPORT GUIDE FOR INSTALLING NOKIA 32

NOKIA 32 SUPPORT GUIDE FOR INSTALLING NOKIA 32 NIA 32 SUPPORT GUIDE FOR INSTALLING NIA 32 CONTENTS 1. INTRODUCTION...1 2. INSTALLATION...1 2.1 INSTALLATION ENVIRONMENT...1 2.2 CONNECTING NIA 32 TERMINAL AND PBX / TELEPHONE SET...1 2.3 CONNECTING NIA

More information

Three Network Technologies

Three Network Technologies Three Network Technologies Network The largest worldwide computer network, specialized for voice ing technique: Circuit-switching Internet The global public information infrastructure for data ing technique:

More information

Internet Telephony Terminology

Internet Telephony Terminology Internet Telephony Terminology Understanding the business phone system world can be a daunting task to a lay person who just wants a system that serves his or her business needs. The purpose of this paper

More information

AN-3 SEVEN KEY CONSIDERATIONS BEFORE YOU START YOUR SLIC OR FXS PHONE LINE INTERFACE DESIGN

AN-3 SEVEN KEY CONSIDERATIONS BEFORE YOU START YOUR SLIC OR FXS PHONE LINE INTERFACE DESIGN AN-3 SEVEN KEY CONSIDERATIONS BEFORE YOU START YOUR SLIC OR FXS PHONE LINE INTERFACE DESIGN By Joe Randolph Introduction The conventional 2-wire analog phone line that telephone companies provide to residential

More information

MultiVOIP Voice/Fax over IP Gateways

MultiVOIP Voice/Fax over IP Gateways MultiVOIP Voice/Fax over IP Gateways Configuration Guide for MultiVOIP Units deployed with Avaya TM Communication Manager Models: MVP-130/210/410/810-AV Configuration Guide S000299H Analog MultiVOIP Units

More information

12-36-1000. Autodialler and Relay Telephone Interface 12-36-1000. I/O Telephone Interface with AutoDialer PRODUCT INFORMATION 1.

12-36-1000. Autodialler and Relay Telephone Interface 12-36-1000. I/O Telephone Interface with AutoDialer PRODUCT INFORMATION 1. 12-36-1000 Autodialler and Relay Telephone Interface 1.0 INTRODUCTION 12-36-1000 I/O Telephone Interface with AutoDialer The 12-36-1000 is a autodialer and telephone interface that can be used autonomously

More information

In the idle state, the TIP lead will be high impedance to ground and the RING lead will have the battery voltage. See Figure 1.

In the idle state, the TIP lead will be high impedance to ground and the RING lead will have the battery voltage. See Figure 1. G ROUND START IMPLEMENTATION WITH SILICON LABORATORIES DAAS Background The Silicon Laboratories direct access arrangement (DAA) products are designed as a telecommunication interface that rely on loop-start

More information

Supporting Multiple PBXs in Hybrid Deployment Models

Supporting Multiple PBXs in Hybrid Deployment Models NetVanta Unified Communications Technical Note Supporting Multiple PBXs in Hybrid Deployment Models Application Note for Hybrid Deployments The goal of this technical note is to ensure that you can leverage

More information

LinkPlus Interface Guide

LinkPlus Interface Guide Executone IDS System LinkPlus Interface Guide SpectraLink 6000 System SpectraLink 8000 System July 2008 Edition 1725-36133-001 Version E LinkPlus Interface Guide: Executone IDS System Trademark Information

More information

Firmware version: 1.10 Issue: 7 AUTODIALER GD30.2. Instruction Manual

Firmware version: 1.10 Issue: 7 AUTODIALER GD30.2. Instruction Manual Firmware version: 1.10 Issue: 7 AUTODIALER GD30.2 Instruction Manual Firmware version: 2.0.1 Issue: 0.6 Version of the GPRS transmitters configurator: 1.3.6.3 Date of issue: 07.03.2012 TABLE OF CONTENTS

More information

Introduction to Communication Networks Spring 2007. Unit 5 Switching Principles

Introduction to Communication Networks Spring 2007. Unit 5 Switching Principles Introduction to Communication Networks Spring 2007 Unit 5 Switching Principles Acknowledgements slides comming from: Data and Computer Communication by Wiliam Stallings (our supplementary textbook) numerous

More information

Application Note. Receiving Analog In-Band CPID with the Dialogic 1000 Media Gateway Series

Application Note. Receiving Analog In-Band CPID with the Dialogic 1000 Media Gateway Series Application Note Receiving Analog In-Band CPID with the Dialogic 1000 Media Gateway Series Application Note Receiving Analog In-Band CPID with the Dialogic 1000 Media Gateway Series Executive Summary A

More information

Connect to telephone. Connect to wall jack

Connect to telephone. Connect to wall jack AD350-SE Multi-Function Auto Dialer Installation Install the AD350 SE Multi Function Auto Dialer as shown in the below diagram. The AD350 SE is only work on standard analog phones. Do not install the dialer

More information

2.4 GHz Dual Handset Cordless Telephone Answering System 2255 with Caller ID/Call Waiting

2.4 GHz Dual Handset Cordless Telephone Answering System 2255 with Caller ID/Call Waiting USER S MANUAL Part 2 2.4 GHz Dual Handset Cordless Telephone Answering System 2255 with Caller ID/Call Waiting Please also read Part 1 Important Product Information AT&T and the globe symbol are registered

More information

Current Loop Application Note 1495

Current Loop Application Note 1495 Current Loop Application Note Document No. CLAN1495 International Headquarter B&B Electronics Mfg. Co. Inc. 707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350 USA Phone (815) 433-5100 -- General Fax

More information

Line Cards Description

Line Cards Description Meridian 1 Document Number: 553-3001-105 Document Release: Standard 7.00 Date: January2002 Year Publish FCC TM Copyright 1994 2002 Nortel Networks All Rights Reserved Printed in Canada Information is subject

More information

2005 Ameritec Corporation askzeke@ameritec.com

2005 Ameritec Corporation askzeke@ameritec.com Characterizing Voice Echo Response for Voice over IP Networks This white paper defines echo and describes where it occurs in a voice network. It examines the basic aspects of echo analysis and describes

More information

VALLEY TELEPHONE COOPERATIVE, INC. SECTION 17 MEMBER SERVICES TARIFF DIGITAL CENTREX SERVICE. Table of Contents

VALLEY TELEPHONE COOPERATIVE, INC. SECTION 17 MEMBER SERVICES TARIFF DIGITAL CENTREX SERVICE. Table of Contents VALLEY TELEPHOE COOPERATIVE, IC. SECTIO 17 RAYMODVILLE, TEXAS Original Contents DIGITAL CETREX SERVICE Table of Contents Page DIGITAL CETREX SERVICE I. General 1 II. Descriptions 2 III. Definitions 4 IV.

More information

IP PBX. SD Card Slot. FXO Ports. PBX WAN port. FXO Ports LED, RED means online

IP PBX. SD Card Slot. FXO Ports. PBX WAN port. FXO Ports LED, RED means online 1 IP PBX SD Card Slot FXO Ports PBX LAN port PBX WAN port FXO Ports LED, RED means online 2 Connect the IP PBX to Your LAN Internet PSTN Router Ethernet Switch FXO Ports 3 Access the PBX s WEB GUI The

More information

Introduction to Packet Voice Technologies and VoIP

Introduction to Packet Voice Technologies and VoIP Introduction to Packet Voice Technologies and VoIP Cisco Networking Academy Program Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.se IP Telephony 1 Traditional Telephony 2 Basic

More information

GW400 VoIP Gateway. User s Guide

GW400 VoIP Gateway. User s Guide GW400 VoIP Gateway User s Guide P/N: 956YD30001 Copyright 2006. All Rights Reserved. Document Version: 1.0 All trademarks and trade names are the properties of their respective owners. i Table of Contents

More information

DigiPoints Volume 1. Student Workbook. Module 4 Bandwidth Management

DigiPoints Volume 1. Student Workbook. Module 4 Bandwidth Management Bandwidth Management Page 4.1 DigiPoints Volume 1 Module 4 Bandwidth Management Summary This module will cover Time Division Multiplexing (TDM). TDM technology allows many users to access a particular

More information

PLAN B. Call Forwarding Allows you to redirect all calls to another telephone number.

PLAN B. Call Forwarding Allows you to redirect all calls to another telephone number. 989-453-4321 * 1-800-292-0614 * E-mail: pgntelco@avci.net SERVING: PIGEON, TWINING, ALBA, AND LAKES OF THE NORTH PLAN B Automatic Recall This feature allows a subscriber to place a call to the source of

More information

AT&T. DEFINITY Communications. and System 85 8102 and 8110 Telephone User's Guide. System Generic 2

AT&T. DEFINITY Communications. and System 85 8102 and 8110 Telephone User's Guide. System Generic 2 AT&T DEFINITY Communications System Generic and System 85 810 and 8110 Telephone User's Guide NOTICE While reasonable efforts were made to ensure that the information in this document was complete and

More information

Adjusting Voice Quality

Adjusting Voice Quality Adjusting Voice Quality Electrical Characteristics This topic describes the electrical characteristics of analog voice and the factors affecting voice quality. Factors That Affect Voice Quality The following

More information

Four-Line Intercom Speakerphone 944

Four-Line Intercom Speakerphone 944 1 USER S MANUAL Part 2 Four-Line Intercom Speakerphone 944 Please also read Part 1 Important Product Information AT&T and the globe symbol are registered trademarks of AT&T Corp. licensed to Advanced American

More information

Technical Note. TN: 00001 Technical note for phone access of HMS system. Rev. a

Technical Note. TN: 00001 Technical note for phone access of HMS system. Rev. a Phone scenarios covered: A. Access with a hard-wired house phone connected to a completed, properly wired OnQ telecom system. B. Access with a cordless house phone connected to a completed, properly wired

More information

MAX T1/E1 Configuration Commands. Table of Contents

MAX T1/E1 Configuration Commands. Table of Contents Table of Contents Summary... 1 Overview of Digital Trunk Interface... 1 Timing Clock Mode Setup... 1 Parameters...1 The MAX T1/E1 as the Clock Master...2 The MAX T1/E1 as the Clock Slave...2 Digital Trunk

More information

Chapter 4 T1 Interface Card

Chapter 4 T1 Interface Card Chapter 4 T1 Interface Card GENERAL This chapter describes DTE interface options that may be required if application requirements change. It also describes software configuration for the T1 interface card.

More information

Host Media Processing Modular Line Interface Board

Host Media Processing Modular Line Interface Board Host Media Processing Modular Line Interface Board TECHNICAL MANUAL Documentation Revision 0.0: August 22, 2013 Copyright 2013 by American Tel-A-Systems, Inc. All rights reserved. 266M002 This manual applies

More information

AT&T MERLIN COMMUNICATIONS SYSTEM ADMINISTRATION MANUAL: MODELS 206 AND 410 WITH FEATURE PACKAGE 1

AT&T MERLIN COMMUNICATIONS SYSTEM ADMINISTRATION MANUAL: MODELS 206 AND 410 WITH FEATURE PACKAGE 1 AT&T MERLIN COMMUNICATIONS SYSTEM ADMINISTRATION MANUAL: MODELS 206 AND 410 WITH FEATURE PACKAGE 1 Table of Contents Page How to Use This Manual The MERLIN Voice Terminal Setting the Control Unit Model

More information

AI-80 CALLER ID SIGNAL GENERATOR. Key Features. Applications. Generates both On Hook and Off Hook (Type I/II) Caller ID signals

AI-80 CALLER ID SIGNAL GENERATOR. Key Features. Applications. Generates both On Hook and Off Hook (Type I/II) Caller ID signals CALLER ID SIGNAL GENERATOR Key Features Generates both On Hook and Off Hook (Type I/II) Caller ID signals Supports both FSK and DTMF Signalling Methods Supports all Caller ID Standards such as Bellcore,

More information

DV-1D Data/Voice DSU TABLE OF CONTENTS SECTION 1 - DESCRIPTION...2 SECTION 2 - SPECIFICATIONS...8 SECTION 3 - INSTALLATION...11

DV-1D Data/Voice DSU TABLE OF CONTENTS SECTION 1 - DESCRIPTION...2 SECTION 2 - SPECIFICATIONS...8 SECTION 3 - INSTALLATION...11 DV-1D Data/Voice DSU TABLE OF CONTENTS SECTION 1 - DESCRIPTION...2 SECTION 2 - SPECIFICATIONS...8 SECTION 3 - INSTALLATION...11 SECTION 4 - OPERATION...18 SECTION 5 - FRONT PANEL CONTROLS AND INDICATORS...25

More information

eircom advantage advantage eircom

eircom advantage advantage eircom eircom advantage advantage eircom standard phone D4Phone user guide Standard System D4 User Guide 1 Specifications subject to change without notice. Facilities described may or may not be supported by

More information

FWT-8848 GSM (GATEWAY) USER S MANUAL

FWT-8848 GSM (GATEWAY) USER S MANUAL FWT-8848 GSM (GATEWAY) USER S MANUAL COPYRIGHT -2009 1 ST VERSION 1 1,General Description: FWT-8848 is a GSM to Analog Converter(single port,insert 1 sim card only), the device can produce a FXS line to

More information

Channelized E1 and Channelized T1 Setup Commands

Channelized E1 and Channelized T1 Setup Commands Channelized E1 and Channelized T1 Setup Commands This chapter describes the function and displays the syntax for channelized E1 and channelized T1 setup commands. For more information about defaults and

More information

Integrating the Avaya Definity G3 Analog PBX

Integrating the Avaya Definity G3 Analog PBX NetVanta Unified Communications Technical Note Integrating the Avaya Definity G3 Analog PBX Introduction With in-band integration, one pathway between the private branch exchange (PBX) and the UC server

More information

._-_. Appendix 1 Page 22. CFDA To DID Intraswitch (8022)

._-_. Appendix 1 Page 22. CFDA To DID Intraswitch (8022) ._-. ----------------_. Appendix 1 Page 22 CFDA To DID Intraswitch (8022) Call Forwarding Don't Answer to DID Intraswitch allows calls to be forwarded to a DID number served from the same central office

More information

Voice over IP. first-step. Kevin Wallace. 2006 Cisco Press Voice over IP First-Step 1587201569

Voice over IP. first-step. Kevin Wallace. 2006 Cisco Press Voice over IP First-Step 1587201569 Voice over IP first-step Kevin Wallace 2006 Cisco Press Voice over IP First-Step 1587201569 What You Will Learn After reading this chapter, you should be able to Explain the differences between various

More information

Chapter 8: The Telephone System

Chapter 8: The Telephone System Chapter 8: The Telephone System MULTIPLE CHOICE 1. DTMF stands for: a. Digital Telephony Multiple Frequency c. Dual-Tone Multifrequency b. Dial Tone Master Frequency d. Digital Trunk Master Frequency 2.

More information

Public Switched Telephone Network (PSTN) Simulators

Public Switched Telephone Network (PSTN) Simulators Rev. 2.0 Updated Feb. 2006 Public Switched Telephone Network (PSTN) Simulators (ANALOG FXS AND T1/E1 PORTS) This user manual is applicable to the following products: SIM-2FXS, SIM-2FXS-A, SIM-4FXS, SIM-4FXS-A,

More information

LinkPlus Interface Guide

LinkPlus Interface Guide Avaya DEFINITY Communications System LinkPlus Interface Guide SpectraLink 6000 System SpectraLink 8000 System July 2008 Edition 1725-36130-001 Version E LinkPlus Interface Guide: Avaya DEFINITY Communications

More information

LinkPlus Interface Guide

LinkPlus Interface Guide Toshiba Strata DK/CTX System LinkPlus Interface Guide SpectraLink 6000 System SpectraLink 8000 System July 2008 Edition 1725-36145-001 Version E LinkPlus Interface Guide: Toshiba Strata DK/CTX System Trademark

More information

2402 Digital Telephone User s Guide

2402 Digital Telephone User s Guide 2402 Digital Telephone User s Guide 555-233-789 Issue 1 October 2003 NOTICE While reasonable efforts were made to ensure that the information in this document was complete and accurate at the time of printing,

More information

E1-GSM RION ORION TELECOM NETWORKS INC. E1 Channel Bank with 30 X GSM Wireless Interface(s) TELECOM NETWORKS

E1-GSM RION ORION TELECOM NETWORKS INC. E1 Channel Bank with 30 X GSM Wireless Interface(s) TELECOM NETWORKS RION TELECOM NETWORKS ORION TELECOM NETWORKS INC. E1-GSM TM E1 Channel Bank with 30 X GSM Wireless Interface(s) Product Overview Features & Highlights Ordering Information Product Specifications 1. E1

More information

STANDARD TELEPHONE USER GUIDE

STANDARD TELEPHONE USER GUIDE STANDARD TELEPHONE USER GUIDE Release 1 COPYRIGHT 1993 TOSHIBA AMERICA INFORMATION SYSTEMS, INC. All rights reserved. No part of this manual may be reproduced in any form or by any means graphic, electronic,

More information

Table of Contents GETTING STARTED... 3. Enter Password Dialog...3 Using Online Help...3 System Configuration Menu...4

Table of Contents GETTING STARTED... 3. Enter Password Dialog...3 Using Online Help...3 System Configuration Menu...4 Table of Contents DV2000 Configuration - Service Release 3.0 GETTING STARTED... 3 Enter Password Dialog...3 Using Online Help...3 System Configuration Menu...4 SYSTEM CONFIGURATION OVERVIEW... 5 Using

More information

PagePac PAGEPAL V-5335700

PagePac PAGEPAL V-5335700 PagePac Issue 3 by PAGEPAL V-5335700 INTRODUCTION The PagePal unit interfaces most telephone systems (PBX, KTS, Centrex) to virtually any public address audio system. In addition, PagePal furnishes inputs

More information

Understanding FXO Disconnect Problem

Understanding FXO Disconnect Problem Understanding FXO Disconnect Problem Document ID: 8120 Contents Introduction Prerequisites Requirements Components Used Conventions Understand the FXO Disconnect Problem Common Scenarios Understand Supervisory

More information

CelluLine CGW-TS GSM Cellular Gateway. Installation and Programming Manual

CelluLine CGW-TS GSM Cellular Gateway. Installation and Programming Manual CelluLine CGW-TS GSM Cellular Gateway Installation and Programming Manual CelluLine CGW-TS GSM Cellular Gateway Installation and Programming Manual CGWTS-M001A Version 1, Release 1, December 2004 NOTICE

More information

Automatic Telephone Dialer TD-101(W)

Automatic Telephone Dialer TD-101(W) Automatic Telephone Dialer TD-101(W) The TD-101 is an automatic dialing device which can transmit prerecorded information via the telephone line. The dialer can send two different 10 second voice messages

More information

Voice Dial Plans, Configuring Voice Interfaces and Dial Peers

Voice Dial Plans, Configuring Voice Interfaces and Dial Peers Voice Dial Plans, Configuring Voice Interfaces and Dial Peers Cisco Networking Academy Program 1 Call Establishment Principles 2 Dial-Peer Call Legs 3 End-to-End Calls 4 Configuring Dial Peers 5 Understanding

More information

Supplement No. 83 - Telephone - PA P.U.C. No. 11. North Pittsburgh Telephone Company Section 13 Original Sheet 1 INTERCOMPANY PRIVATE LINE SERVICE

Supplement No. 83 - Telephone - PA P.U.C. No. 11. North Pittsburgh Telephone Company Section 13 Original Sheet 1 INTERCOMPANY PRIVATE LINE SERVICE Original Sheet 1 I. General PRIVATE LINE SERVICE A. Channels are furnished for intraexchange or interexchange service on a two-point or multi-point basis for a minimum period of one month. B. With reference

More information

Design and Construction of Microcontroller- Based Telephone Exchange System

Design and Construction of Microcontroller- Based Telephone Exchange System Design and Construction of Microcontroller- Based Telephone Exchange System Aye Sandar Win Abstract This paper demonstrates design and construction of microcontroller-based telephone exchange system and

More information

eircom advantage 4800 System Introduction

eircom advantage 4800 System Introduction eircom advantage 4800 System Introduction Specifications subject to change without notice. Facilities described may or may not be supported by your network. eircom advantage is the registered trademark

More information

OmniPCX Enterprise. Easy Reflexes TM. Quick Guide

OmniPCX Enterprise. Easy Reflexes TM. Quick Guide OmniPCX Enterprise Easy Reflexes TM Quick Guide User Guide Easy REFLEXESÔ Alcatel OmniPCXÔ 4400 Your Easy REFLEXESÔ terminal provides simple and quick access to all the services and features offered by

More information

AT&T MERLIN COMMUNICATIONS SYSTEM USER S GUIDE MODELS 206, 410 AND 820 WITH FEATURE PACKAGE 2

AT&T MERLIN COMMUNICATIONS SYSTEM USER S GUIDE MODELS 206, 410 AND 820 WITH FEATURE PACKAGE 2 AT&T MERLIN COMMUNICATIONS SYSTEM USER S GUIDE MODELS 206, 410 AND 820 WITH FEATURE PACKAGE 2 Table of Contents Page Page Available Features Key to Symbols Placing and Answering Calls Line Buttons and

More information