VOICE SOLUTIONS NGN. Telephone-Handbook NEXT GENERATION NETWORK. UAN: (051) /Nayatel
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1 VOICE SOLUTIONS NGN Telephone-Handbook NEXT GENERATION NETWORK UAN: (051) /
2 Table of Contents Sr.No Contents Page No. 1. Introduction 1 2. Hosted Exchange Solution 2-9 2a. Overview HostEX Features HostEX checklist b. Hosted Exchange Architecture c. HostEX Application Scenarios A- WLAN Mobiles connectivity B- Analog Telephony Adapter (ATA) C- Internet and Voice Integration 1 D- Internet and Voice Integration 2 E- HostEX Interoffice Communication SIP (Session Initiation Protocol) A- SIP Architecture B- SIP Interoffice Communication PRI (Primary Rate Interface) A- PRI Architecture B- PRI Interoffice Communication Customer Services
3 1. Introduction The emergence of Next Generation Network (NGN) solutions has had a significant impact on the way businesses deploy telephony services. Recent advances in networking technology has stepped up the industry s shift from PSTN towards Voice over IP (VoIP) based services. NGN Technology: A step forward for corporate sector (Pvt) Ltd. being a facilities based carrier provides converged Triple Play services (Voice, Video, and Data) on Pakistan's first Fiber-to-the-user (FTTU) network. 's Next-Generation-Network (NGN) is new, evolutionoriented; telecommunication network architecture based on packet transport and dedicated control and service layers. The objective of NGN is to have a single network for all telecommunication services to provide high efficiency and multi-services. It supports legacy applications of Plain Old Telephony System (POTS) and also new and enriched applications of future like real time video telephony, etc. In terms of quality of service, it provides top notch quality service, high quality voice, no dropped calls and enhanced voice features. NGN telephony hand book is particularly designed to give you insight into application scenarios of NGN telephony services in corporate environment. The information would hopefully be beneficial for customer organizations to access their corporate telephony needs and s contribution to compliment value of their business operations. Marketing Department (Pvt) Ltd. NEXT GENERATION NETWORK [1]
4 2. Hosted Exchange Solution 2a. Overview Hosted Exchange solution gives you the features and functionality of telephone systems without incurring huge cash outlays for traditional PBX equipment. s Hosted Exchange, instead does that all virtually for you. HostEX Features Corporate Office/Contact Center features Digital receptionist/interactive Voice Response (IVR) Ring Groups Automatic Call Distribution (ACD) Music on Hold Call Queuing Call Management Features Call Forwarding Call waiting indication Call transfer Call Monitoring Caller ID on extensions Call Parking Conference Calling Voice Mail Web based call statistics and reporting One exchange for multiple offices Direct Inward Dialing (DIDs) Call recording HostEX checklist Requirements for Hosted Exchange Solution at customer premises verified IP-Phones (Hard/soft phones) Managed Fast-Ethernet switch for the IP-Phone network Data and VoIP networks are physically or virtually (VLAN) separated. A separate virtual LAN is recommended for better voice quality UPS (power backup for Fast-Ethernet Switches, ATA & IP Phones) All Ethernet Cables are tagged on Fast-Ethernet Switch side All Ethernet Cables are tagged on IP-Phone Sides [2]
5 2. Hosted Exchange Solution 2b. Hosted Exchange Architecture PSTN NGN Cell Phones GSM/AIMS Host EX Virtual PABX Virtual PABX Data and VoIP networks are physically or virtually (VLAN) separated VOIP switch VOIP switch IP Phone (SIP v2) Computer Network Figure 2.1 How 's HostEX (Hosted Exchange) works? Calls from PSTN/Cellular Networks terminate at NGN switch Calls are then forwarded to customer's virtual PBX (located at Data Center) Customer's Virtual PBX provides auto attendant features, DIDs, and conference calling etc Virtual PBX further routes incoming calls at desired extension numbers/ip phones (at Customer Premises) Follow me feature is available if the call is unanswered or Manager/Administrator wants incoming calls to be attended at any other premises/remote location All outgoing calls from customer premises are received at NGN switch, and are further routed to interconnect networks [3]
6 2. Hosted Exchange Solution 2c. Hosted Exchange Application Scenarios Following diagrams highlights application scenarios for Hosted Exchange solution at customer premises. HostEX a. WLAN Mobiles connectivity Allows users to commute easily in office premises and receive calls on their mobile phones with in WiFi network range Make calls using office exchange without using GSM network Requirement: Wireless Access Point (connected with Ethernet Switch), SIP enabled handsets/mobile phones Ethernet Switch WiFi Access Pount By passing GSM Network WiFi+SIP Enabled Mobile Phones Figure 2.2 [4]
7 2. Hosted Exchange Solution 2c. Hosted Exchange Application Scenarios HostEX b. Analog Telephony Adapter (ATA) Ethernet Switch ATA interface with the switch allows users to connect conventional analogue phone sets instead of using IP phones ATA is a device used to connect one or more standard analog telephones to a Voice over IP based network. An ATA usually takes the form of a small box with a power adapter, one Ethernet port. Users can plug one or more standard analog telephone devices into the ATA and the analog device(s) will operate transparently on a RJ11 Analog Telephone Adapter RJ11 Figure 2.3 a [5]
8 2. Hosted Exchange Solution Hosted Exchange Solution 2c. Host Exchange Application Scenarios HostEX Ethernet Port b. Analog Telephone Adapter (ATA) Analog Telephony Adapter (ATA) can directly be connected with your (Ethernet Port), allowing you to connect analog telephone sets. (Equivalent to ports available in ATA) Analog Telephone Adapter RJ11 Figure 2.3 b [6]
9 2. Hosted Exchange Solution Hosted Exchange Solution 2c. Host Exchange Application Scenarios HostEX VOIP switch Data Switch Soft Phone Wired Ethernet WiFi Internet Figure 2.4 c. Internet & voice integration 1 In above mentioned scenario contact center employees can use their PC for data and voice applications simultaneously. Customers can use soft phones ( verified) to make and receive calls via their desktop using wired internet, and internet can be used via WiFi network Data and VoIP networks are physically or virtually (VLAN) separated. A separate virtual LAN is recommended for better voice quality [7]
10 2. Hosted Exchange Solution Hosted Exchange Solution 2c. Host Exchange Application Scenarios HostEX d. Internet & Voice Integration 2 Under this scenario, employees PCs can directly be connected with IP phone's Ethernet Port To execute this scenario, IP phone must support VLAN tagging capability (voice/data packets are tagged with different VLAN IDs to segregate the traffic) Ethernet Switch VLAN1+VLAN q PC VLAN1 (Internet) IP Phone VLAN2 (VoIPt) Figure 2.5 [8]
11 2. Hosted Exchange Solution Hosted Exchange Solution 2c. Host Exchange Application Scenarios Hosted PABX PSTN Virtual PABX Ethernet Ethernet Ext Location B IP Phone Network Figure Location A IP Phone Network e. Interoffice communication (without local call charges) Fiber connectivity is required at both ends (P2P link) The feature allows the users (Location A&B) to commute with extensions/ip phones at both ends/ locations without bearing local call charges virtual PBX ( Data Center) is shared between both locations [9]
12 3. SIP (Session Initiation Protocol) 3. Session Hosted Initiation Exchange Protocol Solution a. SIP Architecture voip Gateway Managed Ethernet Switch with VLANS IP PABX With Ethernet Interface IP Phone Network Local Area Network (Computer Network) Figure 3.1 a. SIP (Session Initiation Protocol) The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. It can be used to create twoparty, multiparty, or multicast sessions that include Internet telephone calls, multimedia distribution, and multimedia conferences. [10]
13 3. SIP (Session Initiation Protocol) 3. Session Hosted Initiation Exchange Protocol Solution a. How SIP works? Calls from PSTN/Cellular networks terminate at NGN Switch (VoIP gateway), which are forwarded to IP PBX (situated at customer premises) Customer can either use SIP enabled IP phones, Soft phone, or analogue phones (with ATA) to commute (which are registered/connected to IP PBX) All outgoing calls from customer's IP PBX through 's are received at NGN switch, and further routed to interconnect networks [11]
14 3. SIP (Session Initiation Protocol) 3. Session Hosted Initiation Exchange Protocol Solution b. SIP Interoffice Communication Ethernet Ethernet IP PABX With Ethernet Interface Extension Registered Remotely At Location B Extension Registered Remotely At Location B b. SIP Interoffice communication (without local call charges) Fiber connectivity is required at both ends (P2P link) The feature allows the users (Location A&B) to commute with extensions/ip phones at both ends/ location without bearing local call cost [12]
15 4. Primary Rate Interface(PRI) Primary Session Hosted Rate Initiation Exchange Interface Protocol Solution (PRI) a. PRI Architecture IP PABX FTTU 30 DIDS IP Multiplexer Analog Telephone Network PRI Cards NGN Switch PSTN Computer Network Figure 4.1 a. PRI Calls from PSTN/Cellular networks terminate at NGN Switch Calls are then forwarded at PBX (situated at customer premises) IP Mux is used as an interface between (optical Network Terminal) and PBX, to convert circuit switching into VoIP and vice versa PRI provides 30 dedicated voice channels over a single physical link All outgoing calls from customer's PBX through 's are received at NGN switch, and further routed to interconnect networks [13]
16 4. Primary Rate Interface(PRI) Primary Session Hosted Rate Initiation Exchange Interface Protocol Solution (PRI) a. PRI Interoffice Communication NGN Telephone Switch IP Multiplexer IP Multiplexer IP PABX IP PABX Dedicated Bandwidth Channels Location B Location A Figure 4.2 d. PRI Interoffice Connectivity Fiber connectivity is required at both ends (P2P link) The feature allows the users (Location A&B) to commute with extensions/ip phones at both ends/locations without bearing local call charges. [14]
17 5. Customer Services Primary Session Hosted Rate Initiation Exchange Interface Protocol Solution (PRI) In case you need further information on 's NGN telephony solutions and their adaptability in your organization, or if your would like our customer service representative to guide you of a particular service feature or to assess your needs, please contact by either of the following means; Marketing:...marketing@nayatel.com Sales:...sales@nayatel.com General Information:... Info@nayatel.com Technical Support:...support@nayatel.com Website NGN telephony section on 's web portal provides complete overview on FTTU voice portfolio, service features, FAQs, and tariff etc. In case you need further information and guidance on NGN Telephony services, you can also submit the online information request form. Telephone UAN: (+92 51) Fax: (+92) Corporate Office Pvt. Ltd. GD Arcade, 73-E, Fazal-ul-Haq Road, Blue Area, Islamabad, Pakistan [15]
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