GENERAL EXCHANGE PRICE LIST 10. DIGITAL NETWORK SERVICES 10.2 INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) 11

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1 COMPANY First Revised Sheet 1 High Point, North Carolina Canceling Original Sheet 1 Effective: October 15, FRAME RELAY SERVICE GENERAL REGULATIONS EXPLANATION OF TERMS OBLIGATIONS OF THE CUSTOMER OBLIGATIONS OF THE COMPANY OPTIONAL PAYMENT PLAN RATES AND CHARGES INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) GENERAL TECHNICAL SPECIFICATIONS REGULATIONS CIRCUIT-SWITCHED FEATURE PACKAGES AND DEFINITIONS PACKET-SWITCHED DATA SERVICE DESCRIPTIONS RATES AND CHARGES INTEGRATED SERVICES DIGITAL NETWORK (ISDN) PRIMARY RATE INTERFACE (PRI) GENERAL REGULATIONS EXPLANATION OF TERMS RATES AND CHARGES 21 Sheet 10.4 RESERVED FOR FUTURE USE 22 (C) (D) (D) 10.5 ASYNCHRONOUS TRANSFER MODE (ATM) SERVICE GENERAL EXPLANATION OF TERMS REGULATIONS OBLIGATIONS OF THE COMPANY OBLIGATIONS OF THE CUSTOMER OPTIONAL PAYMENT PLAN (OPP) SERVICE COMPONENTS RATES AND CHARGES NORTH STATE METRO ETHERNET SERVICE GENERAL CANCELLATION REGULATIONS OPTIONAL PAYMENT PLAN RATES AND CHARGES 48

2 COMPANY Original Sheet 1 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE GENERAL A. Frame Relay Service (FRS) is a fast packet network service that permits the two-way transmission of data at speeds from 56 kbps to Mbps using Permanent Virtual Circuits (PVCs). B. Permanent Virtual Circuits (PVCs) are logical circuits that define a specific one-way path for data sent by the customer to another customer location. These circuits are virtual because they are established in software tables and do not tie up capacity when not in use. This also allows multiple PVCs to be defined over a single access line, thereby providing a single access line the capability to transmit data to multiple destinations. C. In the operation of Frame Relay Service, Customer Premises Equipment (CPE), such as routers, encapsulate data into variable length frames. These frames contain information identifying which PVC in the network should be used to forward the frame to the proper destination. The CPE then sends the frame into the Frame Relay network. The Frame Relay switch reads identifying information and routes the frame to the proper destination based on a pre-established PVC. D. The statistical multiplexing Frame Relay switches are able to provide shared network resources to end users of this service. E. Frame Relay Service conforms to Consultative Committee for International Telegraph and Telephone (CCITT) and American National Standards Institute (ANSI) standards set forth in technical publications. F. Frame Relay Service, as provided for in this Price list section, is offered for intralata use only. G. The regulations and rates specified herein are in addition to the applicable regulations and rates specified in other sections of this Price list. H. The rates and charges set forth for Frame Relay Service provide for the furnishing of service where suitable facilities are available. I. Frame Relay PVCs may be interconnected with Asynchronous Transfer Mode (ATM) Service subject to the provisions set forth in Section 10.5 of this Price list REGULATIONS A. Frame Relay is a transport service that facilitates the exchange of variable length information units (frames) between end user connections by way of PVCs. Each frame is passed to the Frame Relay Network with an address that specifies the virtual connection. B. Variable frame length capability is useful in communications between asynchronous Local Area Networks (LAN) and for transport of synchronous data traffic. Frame Relay is capable of handling the requirements of bursty data sources because of the ability of the service to allocate additional bandwidth when not in use by other sources. C. Frame Relay is provided to the customer in the form of Frame Relay Port with Access Line or Frame Relay with Port only and the Permanent Virtual Circuits (PVC). The Frame Relay Access Line forms the local access component which provides the customer access to the customer s serving central office and a primary address associated specifically with that customer. The Logical Link consists of the Frame Relay network and the interoffice transport and facilities from the customer s Serving Central Office to the Frame Relay Office(s). The Frame Relay Access Line is provided for use only with Frame Relay Service. The Frame Relay with Port Only is provided for digital special access line connections to the network supporting Frame Relay Service. D. The actual throughput of aggregated PVC bandwidths in use at the same time on the same port cannot exceed the port speed.

3 COMPANY Original Sheet 2 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) REGULATIONS (Cont d) E. Since all PVCs are typically not in use at the same time, it is possible for the total bandwidth of all PVCs associated with one Frame Relay Access Line to exceed the bandwidth of that Frame Relay Access Line. This relationship is referred to as over-subscription and when this occurs, there can be no guarantee that the bandwidth defined for that PVC will be available at any point in time. F. No PVC can have a greater bit rate than the bit rate of the associated Access Line. G. The PVC must be associated with at least one Frame Relay Port. A Frame Relay Port can be associated with multiple PVCs. H. A customer subscribing to a PVC will be referred to as the Controller of the Frame Relay Port. A Customer may request data transmission capability to another customer. Both customers must subscribe to Frame Relay Service. The Controller of the Frame Relay Access Line must have written permission from the Controller of the other Frame Relay Access Line for this data transmission capability. I. The Frame Relay Port with Access Line or Frame Relay Port only and PVC are ordered and billed independently and can have different customers as Controllers. A request by one customer to discontinue a PVC does not result in the disconnection of the Frame Relay Access Line or Port. Only the Controller of a Frame Relay Access Line may authorize a disconnect of that Frame Relay Port with Access Line. J. The Company does not undertake to originate data, but offers the use of its service components, where available, to customers for the purpose of transporting customer-originated data. K. In some cases, the Company and another Local Exchange Carrier (LEC), that offers Frame Relay technology, will jointly connect Frame Relay switching equipment within a LATA to provide customers the ability to interconnect their locations served by the different LECs. In order to utilize the Company s portion of this jointly provided connections, the customer must subscribe to Frame Relay Service and to the Intercompany Frame Relay Network to Network Interface (NNI) Link. Mutually agreeable terms and conditions between the Company and interconnecting LECs must be reached prior to the establishment of an Intercompany Frame Relay NNI Link. L. At service subscription, the customer must specify the Committed Information Rate (CIR) and the Burst Rate for each PVC ordered. M. Error correction is the responsibility of the customer s Frame Relay terminal equipment. When the FRS network is congested, customer data that exceeds the CIR ordered at service subscription may be discarded. The FRS nodes will discard frames with errors. N. The Company may establish facilities between Frame Relay Service switching equipment and Asynchronous Transfer Mode (ATM) Service switching equipment and may allow customers to share bandwidth on these facilities. Where these facilities are available to customers; the Frame to ATM Inter-Networking Link option exists. In addition to the Frame Relay Links that extend between Frame Relay switches and ATM switches must have an associated CIR. At least one PVC is required between both customer premises through the Frame to ATM Inter-Networking Link. All the CIRs on this PVC must have the same value. Frame to ATM Inter- Networking Links are only available where facilities exist.

4 COMPANY Original Sheet FRAME RELAY SERVICE (Cont d) EXPLANATION OF TERMS Bust Rate The upper bandwidth limit the permanent virtual circuit is allowed to send data through the FRS network. The burst rate is limited by the actual physical port access speed. Committed Information Rate (CIR) The CIR represents the base-level bandwidth the permanent virtual circuit is allowed to send data through the network. Each Data Link Connection Identifier (DLCI) has an associated CIR setting. The CIR setting enables the customer to have a sustained throughput under normal traffic conditions. Frames submitted at a rate above the subscribed CIR setting are marked Discard Eligible (DE). When the CIR setting is zero, all frames transmitted through the Frame Relay Service Network will be marked DE. Should network congestion occur, frames marked DE are subject to being dropped by the network. However, in the absence of network congestion, all frames marked DE will be transmitted with the same reliability as frames not marked DE within a single, Company Frame Relay Switch. The CIR value selected cannot exceed the minimum transmission speed of the link at either end of the PVC. Customer Premises The geographic location designated by the customer at which an access component of the customer s service is first considered to enter the Company s network. Data Link Connection Identifier (DLCI) The address information contained in the Frame Relay header which conveys to the network how an individual frame should be routed. The DLCI essentially defines to which customer end point a particular frame should be sent. Frame A sequence of contiguous bits delimited by beginning and ending flag sequences. Frame Relay Access Line (FRAL) Frame Relay Access Lines provide access to the Frame Relay Service (FRS) Network, connecting customer facilities at the Network Interface with a corresponding Frame Relay Port.

5 COMPANY Original Sheet 3 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) EXPLANATION OF TERMS (Cont d) Frame Relay Port For Frame Relay Service, the physical entry points for Permanent Virtual Circuits (PVCs). Ports include the electronic equipment used in connecting these service elements to the Frame Relay Network, and enable customers to allocate bandwidth to applications, as needed, at customer designated transmission speeds of between 56 kbps to Mbps. Frame Relay Service A fast packet network service that permits the transmission of data at speeds of 56 kbps to Mbps using Permanent Virtual Circuits (PVCs). Frame to Asynchronous Transfer Mode (ATM) Inter-Networking Links The connection that allows Frame Relay customers a path to connect Frame Relay service switching equipment with ATM switching equipment allowing customers to share bandwidth on facilities. Intercompany Frame Relay NNI Link The connection that allows Company Frame Relay customers a path to extend network capabilities to another LEC s Frame Relay switch. Local Area Network (LAN) A network permitting the interconnection and intercommunication of a group of computers, primarily for the sharing of resources such as data storage devices and printers. Logical Channel A communications channel which allows two-way simultaneous transmission of sequenced data packets through the network. No circuit capability is preassigned to a logical channel. Capacity is made available as the data is transmitted. Each permanent virtual circuit is one logical channel. Network Interface (NI) The point at which a customer s data transmission first enters the network supporting Frame Relay Service. It is the point of interconnection between Company communications facilities and customer terminal equipment. Permanent Virtual Circuit (PVC) A Permanent Virtual Circuit (PVC) is a logical channel from one end user location to another end user location within the Frame Relay Service (FRS) Network. PVCs are provisioned on either 56 kbps, 64 kbps, 128 kbps, 256 kbps, 384 kbps, 768 kbps, or Mbps ports, depending on the customer s data networking requirements. Protocol A set of conditions for conducting interactions between two or more terminals, host or peripherals. These conditions consist of syntax (header structure), semantics (actions and reactions that are supposed to occur) and timing (relative ordering and duration of states and events). Statistical Multiplexing A multiplexing technique in which timeslots are dynamically allocated on the basis of need rather than being predetermined. The data is typically transmitted on a first come, first served basis OBLIGATIONS OF THE CUSTOMER A. The customer s Frame Relay compatible terminal equipment has the responsibility for retransmitting frames which are discarded due to errors or network congestion. B. Where Frame Relay Service is available for use in connection with communications systems or equipment provided by a customer or user, the operating characteristics of such systems or equipment shall be such as not to interfere with any services offered by the Company. Such use is subject to the further provisions that the equipment provided by the customer or user does not endanger the safety of the Company s employees or the public; damage, harm, require change in or alteration of the equipment or other services of the Company; interfere with the proper operation of the Company s equipment or otherwise injure the public in its use of the Company s services. Upon notice from the Company that the equipment provided by the customer or user is causing, or is likely to cause, such hazard or interference, the customer shall take such steps as shall be necessary to remove or prevent such hazard or interference. C. The customer, upon request, shall furnish such CPE information as may be required to permit the Company to configure and maintain the Frame Relay Service it offers.

6 COMPANY Original Sheet FRAME RELAY SERVICE (Cont d) OBLIGATIONS OF THE CUSTOMER (Cont d) D. It shall be the responsibility of the customer to ensure the continuing compatibility of the customer-provided equipment that is used in conjunction with the Frame Relay Service. The CPE shall be in compliance with rules and regulations as specified in Section 15 of this price list. E. The customer shall be responsible for obtaining permission for the Company s agents or employees to enter the premises of the customer at any reasonable hour for the purpose of installing, inspecting, repairing, or, upon termination of the service, removing the service components of the Company. F. The customer shall be responsible for the payment of a nonrecurring Maintenance of Service charge as found in Section 15.4 of this price list for each repair visit to the premises of the customer where the service difficulty or trouble results from the use of equipment or service components provided by the customer. G. The Customer may only use a Frame Relay Access line with Frame Relay Service OBLIGATIONS OF THE COMPANY A. The responsibility of the Company shall be limited to furnishing network equipment suitable for Frame Relay Service and to the maintenance and operation of such equipment in a manner proper for such service. Subject to this responsibility, the Company shall not be responsible for the through transmission of signals generated by the customer-provided equipment or system, or for the quality of, or defects in, such transmission or the reception of signals by such equipment or systems. B. The Company shall not be responsible for installation, operation or maintenance of any terminal equipment, data unit or communications system provided by a customer or user. The Company is not responsible for adapting Frame Relay Service to the technological requirements of any specific customer equipment. C. When a customer orders Frame Relay Service which is relayed to other Local Exchange Carriers, Interexchange Carriers or other Frame Relay networks, the Company will provide advisory assistance as a part of the establishment of this service. D. The Company shall not be responsible to the customer or user if changes in any of the equipment, operations or procedures of the Company used in the provision of Frame Relay Service render any facilities provided by the customer or user obsolete or require modification or alteration of such equipment or system or otherwise affect its use or performance, provided the Company has met any applicable information disclosure requirements otherwise required by law. E. The Company undertakes the responsibility to maintain and repair the service which it furnishes. Network equipment installed by the Company on the customer s premises shall be and remain the property of the Company. The customer or user may not rearrange, disconnect, remove, attempt to repair, remote test, or interface with any network equipment installed by the Company without prior written consent by the Company. F. The Company, by written notice to the customer, may discontinue the furnishing of Frame Relay Service in accordance with the Rules and Regulations as specified in Section 2 of this Price list. G. The Company has the service responsibility up to and including the network interface.

7 COMPANY Original Sheet 5 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) OPTIONAL PAYMENT PLAN (OPP) A. General 1. Payment periods of one year, three years, and five years are available to all customers at the applicable rates set forth in Section regardless of when they subscribe to an OPP arrangement. 2. The customer must designate at order time the payment period described for the OPP. B. Changes in Length of OPP Period Prior to the completion of the selected OPP period, the customer may elect to convert to a new OPP period of the same or different length, subject to the following conditions: - No credit toward the new payment period will be given for payments due and made under the original OPP arrangement. - Nonrecurring charges will not be reapplied for existing service(s). - If the new OPP period is shorter in length than the time remaining under the existing OPP, the change to the new OPP period constitutes a disconnect of the existing OPP service and termination liability charges apply. If no other changes are ordered, the Line Connection Charge, as specified in Section 4 of this Price list, also applies per order. If changes are ordered all applicable nonrecurring charges, as specified in this Section and service charges as specified in Section 4 of this Price list, apply. - Conversion to month-to-month rates will be treated as a disconnect of the existing service and termination liability charges apply. If no other changes are ordered, the Line Connection Charge, as specified in Section 4 of this Price list, also applies per order. If changes are ordered all applicable nonrecurring charges, as specified in this Section and service charges as specified in Section 4 of this Price list, apply. C. Renewal Options 1. At the expiration of an OPP period, the Company will continue to provide the service at the month-tomonth rates unless the customer chooses to renew for the same OPP period, convert to a different OPP period or discontinue service. 2. Conversion to a different OPP period will require the customer to submit a change order. Conversion to a different OPP period will be allowed without application of any nonrecurring or ordering charges. D. Notification of Discontinuance 1. An Order for Discontinuance of an OPP arrangement must be received by the Company at least thirty (30) days prior to actual disconnect of service. Monthly charges will apply for a period of thirty (30) days from the date the Company receives disconnect notification or until the requested disconnect date, whichever period is longer. E. Upgrade to Higher Speed Service 1. Customers may elect to upgrade service(s) to a higher speed during an OPP period, subject to the following conditions: - The upgraded service will be subject to nonrecurring charges. - Termination liability charges will not apply as long as the upgraded service remains connected at the same point(s) of termination. - If the upgrade involves establishing a multiplexing arrangement, termination liability charges will not apply if the serving wire center is the same one associated with the customer designated location.

8 COMPANY Original Sheet 6 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) OPTIONAL PAYMENT PLAN (OPP) (Cont d) F. Termination Liability 1. When an OPP service is discontinued prior to the end of the period, termination liability charges, as set forth below, will apply based on the remainder of the OPP period in effect at the time of disconnect. 2. One Year OPP 50 percent of any remaining portion of the first year s recurring charges. 3. Three Year OPP 50 percent of any remaining portion of the first year s recurring charges. In addition, for any remaining portion of the second and third years, the customer will be liable for 10 percent of the total monthly recurring charges in that time period. 4. Five Year OPP 50 percent of any remaining portion of the first year s recurring charges. In addition, for any remaining portion of the second through fifth years, the customer will be liable for 10 percent of the total monthly recurring charges in that time period. G. Termination Without Liability 1. During an OPP period, should the currently effective rate for a customer s service increase, the customer may, at their option, terminate the OPP arrangement without penalty or liability RATES AND CHARGES A. The minimum contract period for Frame Relay Service is one month. B. A subsequent order to add Frame Relay Access Line(s) or Frame Relay Port(s) to an existing installation will be for a minimum contract period of one month. C. A customer may access Frame Relay Service (FRS) via a Frame Relay Access Line or via Company-provided digital private line facilities. If a customer utilizes private line facilities, or private line transport with a Frame Relay Access Line, to access FRS, the associated regulations, rates and charges for such private line facilities shall apply in addition to the rates and charges associated with the FRS elements. D. A customer utilizing private line facilities to access FRS would not incur a nonrecurring charge, or monthly rate for a Frame Relay Access Line, but would incur all other monthly rates and nonrecurring charges normally associated with the ordering, installation, and provisioning of Frame Relay Service. E. The total number of additional Frame Relay Permanent Virtual Circuits (PVCs) per port purchased by the customer within the LATA determines the rate category for all the additional PVCs per port of that customer, within the LATA. For example, if 15 additional PVCs are subscribed, then all 15 PVCs for that port will be rated at the monthly rate for 11 to 20 PVCs, since 15 falls into that range. F. When a customer subsequently orders additional PVCs, the sum total of all PVCs subscribed to by the Customer shall be used to determine the customer s PVC monthly rate category for all PVCs then subscribed. G. When a customer orders additional PVCs or changes PVC assignments on a given FRS port after the initial port installation, the Frame Relay PVC nonrecurring charge shall apply. H. When a customer orders an Intercompany Frame Relay NNI Link, the nonrecurring and recurring charges as specified in K.5.a apply. The customer must subscribe to Company Frame Relay service to be eligible for an Intercompany Frame Relay NNI Link.

9 COMPANY Original Sheet FRAME RELAY SERVICE (Cont d) RATES AND CHARGES (Cont d) H. Service Rearrangements Service rearrangements are changes to existing (installed) services which do not result in a change in the physical location of the network interface. (Changes in the physical location of the network interface are treated as moves and are described and charged for as set forth herein). 1. Additions to Service a. When service elements are added to an existing service, the added elements must meet the minimum period requirements associated with the service to which they are added. b. When PVCs are added to an existing Frame Relay Service, the minimum period for the added PVCs is one month. c. An addendum to the existing fixed-period service agreement is required when service elements are added to an existing fixed-period service. PVCs may be added to existing fixed-period service on a month-to-month basis without an addendum to the existing fixed-period service agreement. The addendum is for the purpose of identifying service elements that have been added subsequent to establishing the fixed-period agreement. d. Nonrecurring charges will apply for all additions to existing services, service elements, or optional features for which nonrecurring charges normally apply at installation. e. Nonrecurring charges for additional PVCs will be required if PVCs are not purchased with a Frame Relay Port at the time of the original service request. f. Related monthly rates and nonrecurring charges for addition(s) to service are the rates and charges in effect at the time of the addition(s). 2. Upgrades in Speed or Capacity a. Should the customer upgrade either a portion or the entire service provided under a fixed-period service agreement to a higher speed or greater capacity, discontinuance charges will not apply, provided all the following conditions are met: - Both the existing and new services and/or service element(s) are of the same service type; e.g., both Frame Relay Service; - Both the existing and the new services and/or element(s) are provided solely by the Company; - The order to discontinue a service at an existing speed or capacity and the order for the upgraded service are received by the Company at the same time; - The new service will be provided at the same customer location as the discontinued service; - The fixed period plan for the upgraded service(s) and/or service element(s) meets or exceeds the remaining length of the existing fixed-period plan; and - The total monthly rate of the new agreement is equal to or greater than the total monthly rate of the existing agreement period.

10 COMPANY Original Sheet 8 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) RATES AND CHARGES (Cont d) H. Service Rearrangements (Cont d) 2. Upgrades in Speed or Capacity (Cont d) b. The monthly rates for the upgraded services and/or service elements will be those rates in effect at the time of the service upgrade. The related nonrecurring charges which apply for the upgrade are the charges in effect at the time of the service upgrade. c. Should the order to upgrade exclude one or more of the conditions listed above in Section H.2, it will be treated as a discontinuance of the existing service and the establishment of a new service. All outstanding minimum period charges and discontinuance charges will apply. 3. Administrative Changes a. Administrative changes to existing service will be made without charge(s) to the customer. Administrative changes are as follows: - Change of customer name, i.e., the customer or record does not change but rather the customer of record changes its name, e.g., XYZ Company to XYZ Communications, - Change of customer premises address when the change of address is not a result of a physical relocation of facilities, - Change in billing data (name, address, or contact name or telephone number), - Change of customer contact name or telephone number, and - Change of customer service element identification. I. Service charges specified in Section 4 of this Price list apply for installations, customer-requested moves, changes and/or additions performed by the Company. J. Rate Elements 1. Frame Relay Service with Access Line A nonrecurring charge and monthly rate, both based on the speed of the port connection (i.e., 56 kbps or Mbps), apply per port for each physical connection to the network supporting Frame Relay Service (FRS). 2. Frame Relay Service Without Access Line A monthly rate, based on the speed of the port connection (i.e., 56 kbps or Mbps) and the number of unidirectional PVCs assigned to the port, applies per port for each Frame Relay Access Line or digital private line connection to the network supporting FRS. Each port can have multiple PVCs. The first PVC is included with the purchase of the port. 3. Frame Relay PVC (FR-PVC) a. A nonrecurring charge and a monthly rate apply for each PVC. A monthly rate is based on the number of PVCs assigned to the port and applies per port. b. A nonrecurring charge applies for each subsequent order of PVC(s) to be added to PVC assignment(s) changed on an existing FRS.

11 COMPANY Original Sheet 8.1 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) RATES AND CHARGES (Cont d) J. Rate Elements (Cont d) 4. Committed Information Rate (CIR) A nonrecurring charge and monthly rate, both based on the CIR sustained throughput under normal traffic conditions. 5. Intercompany Frame Relay NNI Link A standard nonrecurring charge which is not throughput sensitive and a recurring charge based on throughput requirements.

12 COMPANY Original Sheet 9 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) RATES AND CHARGES (Cont d) K. Rates 1. Frame Relay Service with Access Line Monthly Rate Nonrecurring Rate a. 56/64 kb Month-to-Month $ $ One Year (R) Three Years (R) Five Years (R) b. 128 kb Month-to-Month One Year (R) Three Years (R) Five Years (R) c. 256 kb Month-to-Month One Year (R) Three Years (R) Five Years (R) d. 384 kb Month-to-Month One Year (R) Three Years (R) Five Years (R) e. 768 kb Month-to-Month One Year (R) Three Years (R) Five Years (R) f MB Month-to-Month One Year (R) Three Years (R) Five Years (R) Frame Relay Service Without Access Line (Port Only) a. 56/64 kb Month-to-Month $ $ One Year Three Years Five Years b. 128 kb Month-to-Month One Year Three Years Five Years c. 256 kb Month-to-Month One Year Three Years Five Years

13 COMPANY Original Sheet 10 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) RATES AND CHARGES (Cont d) K. Rates (Cont d) 2. Frame Relay Service Without Access Line (Port Only) (Cont d) Monthly Rate Nonrecurring Rate d. 384 kb Month-to-Month $ $ One Year Three Years Five Years e. 768 kb Month-to-Month One Year Three Years Five Years f. 1,544 Mb Month-to-Month One Year Three Years Five Years Additional Frame Relay Permanent Virtual Circuit (PVC), per port, per PVC a. 2 to 10 PVCs b. 11 to 20 PVCs c. 21 or more PVCs Committed Information Rate (CIR) The chosen CIR cannot exceed the minimum transmission speed of the Link at either end of the PVC. Monthly Rate Nonrecurring Rate (a) Per DLCI (1) 0 kbps (2) 1 through 32 kbps (3) 33 through 56 kbps (4) 57 through 64 kbps (5) 65 through 128 kbps (6) 129 through 256 kbps (7) 257 through 384 kbps (8) 385 through 512 kbps (9) 513 through 768 kbps (10) 769 through Mbps

14 COMPANY Original Sheet 10.1 High Point, North Carolina Effective: December 31, FRAME RELAY SERVICE (Cont d) RATES AND CHARGES (Cont d) K. Rates (Cont d) 5. Intercompany Frame Relay NNI Link The chosen Intercompany Frame Relay NNI Link must be the same through-put as the associated Frame Relay Service. (a) Per Intercompany Frame Relay NNI Link Connection. Monthly Rate Nonrecurring Rate (1) 56 kbps (2) 128 kbps (3) 256 kbps (4) 384 kbps (5) 768 kbps (6) Mbps Frame to ATM Inter-Networking Link The Frame Relay through-put must have the same through-put as the associated ATM service. (a) Per Frame to ATM Inter-Networking Link Monthly Rate Nonrecurring Rate (1) Over 0 thru 256 kbps (2) Over 256 thru 384 kbps (3) Over 384 thru 768 kbps (4) Over 768 thru Mbps (5) Over thru 3 Mbps (6) Over 3 thru 6 Mbps (7) Over 6 thru 9 Mbps (8) Over 9 thru 12 Mbps (9) Over 12 thru 45 Mbps

15 COMPANY Original Sheet INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) GENERAL A. ISDN is a public switched network-based set of communications services that makes it possible to send, receive, and modify information using regular telephone lines. ISDN provides end-to-end digital communications and gives the ability to transmit data and voice over the same telephone line simultaneously (a user can send information from a personal computer and talk to the person on the other end of the line at the same time). This functionality is provided via channelized transport facilities. The ISDN architecture consists of digital central office switching systems which connect Basic Rate Interface (BRI) equipped lines to customers premises. B. ISDN BRI is an optional service arrangement that requires a local exchange access line and uses the ISDN architecture to provide the customer with the capability to transmit voice and data simultaneously over the same digital line. Under various optional arrangements, BRI provides the customer with access to Circuit- Switched Voice Services, Circuit-Switched Data Services, and Packet-Switched Data Services. C. An ISDN BRI arrangement obtains its capability from an ISDN-capable, Telephone Company central office switch. The ISDN BRI arrangement provides two communications channels (but using only one physical line) between a telephone (or computer, fax machine, or other equipment) and the digital central office. These channels are called Bearer, or B Channels. Another channel, called the Delta or D Channel, is used for signaling purposes and in some applications can be used for low speed packet data communications. The complete ISDN BRI line is known as 28+D. 1. B Channel - The B Channel is a bi-directional synchronous channel capable of supporting digital transmission speeds of up to 64 kilobits per second (kbps). Some serving central offices may be limited to speeds of 56 kbps. ISDN interconnection to or through non-isdn equipped central offices will be subrated to 56 kbps per channel. Each B Channel may be configured in one of the following ways: a. Circuit-Switched Voice (CSV) Allows the user to originate and receive only voice calls over a single circuit-switched B Channel. b. Circuit-Switched Data (CSD) Allows the user to originate and receive only data calls over a single circuit-switched B channel. c. Alternate Circuit-Switched Voice/Data (CSV/CSD) Allows the user to originate and receive either voice calls or data calls over a single circuit-switched B channel, but not simultaneously. d. B Channel Packet-Switched Data Service (where available) Allows the user to originate and receive X.25 packet data calls on the B Channel. 2. D Channel The D Channel is a 16 kbps digital signaling channel that carries signaling and control for the B Channels. The D Channel may be optionally used to transmit X.25 packet data (where available) at a maximum transmission throughput of 9.6 kbps. D. All ISDN services consist of central office facilities (including certain outside plant facilities) extended from the Telephone Company s switching equipment to the customer s demarcation point. E. Distance Extension Charges, as set forth in Section of this price list, will apply to customers who are within the serving central office and who are served at a transmission range where unusual expenditures are required to make the service available.

16 COMPANY Original Sheet INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) (Cont d) GENERAL (Cont d) F. Directory Numbers 1. Primary Directory Number (PDN) Each B Channel includes a single primary directory number. The D Channel will include a primary directory number when D Channel Packet Switching is subscribed to. On a given 28+D ISDN BRI line, calls are routed to the appropriate terminal device (voice, telephone, computer/data terminal or packet device) based on the type of call (voice, data, or packet) presented to the ISDN BRI line. 2. Secondary Directory Numbers (SDN) ISDN BRI may have Secondary Directory Numbers. The Secondary Directory Number(s) may originate or receive calls independent of the user s Primary Directory Number; however, each B Channel is allowed only one simultaneous circuit connection at a time TECHNICAL SPECIFICATIONS A. Transmission Specifications The standard transmission parameters for ISDN BRI consists of: A maximum of 38.5db loop loss at a 40kz test tone terminated into a 135 ohm impedance. The 38.5db loss includes all central office facilities, outside plant facilities and inside wiring (which are owned and maintained by the Company only up to and including the demarcation point). B. Customer Premise Equipment and Facilities Compatible customer premise equipment is required to utilize ISDN BRI services. The Company shall not be responsible if changes in any of the equipment, operations, or procedures of the Company utilized in the provisions of ISDN BRI services render any facilities provided by the customer obsolete or require modification of such equipment of system, or otherwise affect its use or performance. C. Electronic Key Telephone Service (EKTS) REGULATIONS Electronic Key Telephone Service is a central office based key system implementation that requires no switching equipment on the customer s premise. EKTS requires the customer to provide an EKTS capable terminal set. EKTS is available to ISDN BRI Business subscribers only and is not available for ISDN BRI Residential subscribers. A. Unless specifically exempted, ISDN BRI shall be subject to all general regulations applicable to the provision of service by the Company as stated in this price list. B. ISDN BRI is provided at the option of the Company. This service is furnished subject to central office switching capacity, capability, the availability of outside plant facilities, and the necessary billing capabilities. 1. The availability, functionality, and capabilities of ISDN BRI may vary, or may not be available, dependent upon the type of serving central office switch, related software controlling that switch, hardware, and associated outside plant. a. Where facilities are not available, or unusual expenditures are involved in making them available, the customer may be required to pay additional charges to cover the unusual expenditure, or to contract for services beyond the normal service term, or both. (These rates and charges will be determined on an individual case basis.) b. Distance Extension Service: ISDN BRI may be provided to a customer s location served beyond the normal transmission range of the serving central office. In such cases, in addition to the charges and rates for ISDN BRI, Distance Extension Service rates and charges as stated in Section are applicable.

17 COMPANY Original Sheet INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) (Cont d) REGULATIONS (Cont d) C. The minimum charge period for the payment of services provided under this price list is one month. D. Directory Listings: One directory listing is provided without charge for each ISDN B Channel and D Channel Primary Directory number. Additional listings may be provided as specified in Section 6 of this price list. E. Billable Call Treatment Normal toll charges shall apply to calls that are made outside of the Local Service Area. F. Customer Premise Equipment 1. This price list for ISDN BRI does not include terminal equipment on the customer s premises. Terminal equipment may be sold or leased separately by the Company (under a separate contract), or may be provided by the customer. 2. The customer is responsible for providing the power required for any and all customer premise equipment connected to an ISDN BRI equipped line. G. The Company shall not be liable for any loss or damages arising out of error, interruptions, defects, failures, or malfunctions of ISDN BRI or associated equipment. Damages arising out of such interruptions, defects, failures, or malfunctions of the services after the Company has been notified, and has reasonable time for repair, shall in no event exceed an amount equivalent to the charges made for the service affected for the period following notice from the customer until service is restored. H. ISDN BRI is not eligible for suspension of service CIRCUIT-SWITCHED FEATURE PACKAGES AND DEFINITIONS Circuit Switching is a switching arrangement in which an entire circuit or, in a digital switch equipped for ISDN, a specific selection of channels is dedicated to a given call. Circuit-Switched Service provides the ability to originate and receive circuit-switched voice and/or data calls over 56/64 kbps B Channel. The customer may choose among the following Circuit-Switched feature packages based upon application needs. A. Residential ISDN Packages Both Packages are Non-EKTS 1. Package 1 Basic Residential ISDN This package contains basic BRI service arranged 28+D with the B Channels configured for CSV, CSD, or CSV/CSD. a. Each B Channel will have a PDN. b. Each B Channel will have Caller ID capabilities. 1 c. Clear Channel Capability A characteristic of the transmission paths on the B Channels that allows the full bandwidth of 64 kbps to be available to the customer. It is also possible to bridge the two B Channels together to achieve data transmission speeds of up to 128 kbps. However, ISDN interconnection to or through non-isdn equipped central offices will be potentially subrated to 56 kbps per channel. Note 1: Caller Id with ISDN-BRI is subject to the same per line or per call blocking options listed in Section 13 of this price list.

18 COMPANY Original Sheet INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) (Cont d) CIRCUIT-SWITCHED FEATURE PACKAGES AND DEFINITIONS (Cont d) A. Residential ISDN Packages Both Packages are Non-EKTS (Cont d) 2. Package 2 Enhanced Residential ISDN This package is the same as Package 1 plus: a. Additional Call Offering This provides up to five additional appearances of the PDN for making/receiving voice calls. b. Flexible Calling This is made up of three-way conference, drop, hold, and transfer features. B. Business ISDN Packages 1. Package 1 Basic Non-EKTS Business ISDN This package contains basic BRI service arranged 28+D with the B Channels configured for CSV, CSD, or CSV/CSD. a. Each B Channel will have PDN. b. Each B Channel will have Caller ID capabilities. 1 c. Clear Channel Capability A characteristic of the transmission paths on the B Channels that allows the full bandwidth of 64 kbps to be available to the customer. It is also possible to bridge the two B Channels together to achieve data transmission speeds up to 128 kbps. However, ISDN interconnection to or through non-isdn equipped central offices will be potentially subrated to 56 kbps per channel. 2. Package 2 Enhanced Non-EKTS Business ISDN This package is the same as Package 1 plus: a. Additional Call Offering This provides up to five additional appearances of the PDN for making/receiving voice calls. b. Flexible Calling this is made up of three-way or six-way conference, drop, hold, and transfer features. c. Call Pickup This feature allows a user to answer calls directed to another line in the same preset Call Pickup Group. d. Multiline Hunt Service This feature allows incoming calls to a busy Directory Number (DN) to search through a predetermined list of DN s. This may be another ISDN DN on the same (or a different) B Channel or (for voice calls) an analog line. The hunting arrangement may be linear or circular. 3. Package 3 EKTS Business ISDN Electronic Key Telephone Service is a central office based key system implementation that requires no switching equipment on the customer s premise. EKTS requires the customer to provide an EKTS capable terminal set. This package contains basic BRI service arranged 28+D with the B Channels configured for CSV, CSD, or CSV/CSD. a. Each B Channel will have a PDN. b. Each B Channel will have Caller ID capabilities. 1 Note 1: Caller ID with ISDN-BRI is subject to the same per line or per call blocking options listed in Section 13 of this price list.

19 COMPANY Original Sheet INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) (Cont d) CIRCUIT-SWITCHED FEATURE PACKAGES AND DEFINITIONS (Cont d) B. Business ISDN Packages (Cont d) 3. Package 3 EKTS Business ISDN (Cont d) c. Clear Channel Capability A characteristic of the transmission paths on the B Channels that allows the full bandwidth of 64 kbps to be available to the customer. It is also possible to bridge two B Channels together to achieve data transmission speeds of up to 128 kbps. However, ISDN Interconnection to or through non-isdn equipped central offices will be potentially subrated to 56 kbps per channel. d. Additional Call Offering This provides up to five additional appearances of the PDN for making/receiving voice calls. e. Flexible Calling This is made up of three-way or six-way conference, drop, hold, and transfer features. f. Multiline Hunt Service This feature allows incoming calls to a busy DN to search through a predetermined list of DN s. This may be another ISDN DN on the same (or a different) B Channel or (for voice calls) an analog line. The hunting arrangement may be linear or circular. g. Up to five secondary directory numbers (SDN) will be available for each B Channel. h. Multiple Appearance Directory Numbers This feature allows DN s from one EKTS set to appear on the EKTS sets of other users. i. Privacy Release This is a privacy feature that allows a customer to specify, on an EKTS group basis, that no other user can bridge on to calls. On a call by call basis, this feature can be disabled to allow bridging to occur. j. Manual Excluding This is the opposite of Privacy Release. On a call by call basis the user can restrict bridging. k. Intercom Calling (dial) This feature allows an EKTS user to call other terminals in the EKTS group with one or two-digit dialing. l. Ringing Options This feature is used with Multiple Appearance Directory Number Arrangements and allows the EKTS set to apply different combinations of ringing (ringing is turned off after a specified period of time), delayed ringing (ringing is turned off after a specified period of time), immediate ringing, no ringing, or normal ringing. On a per EKTS user basis, each DN may have a different ringing option. m. Display Capability This feature allows an appropriately equipped telephone set to display a variety of information. For example, when idle, the time and date is displayed. When the user is making or receiving a call, call progress information is displayed (calling/called number). n. Analog Line Appearance This feature allows analog users DN s to appear on an EKTS set, thereby allowing the EKTS user to provide call coverage for analog users. It may limit the user of other features and/or functionalities on analog lines. o. Feature Function Buttons This feature gives the user the ability to assign features to specific buttons on the EKTS set. When depressed, the button will activate or deactivate the assigned feature. Note: All compatible Star*Plus and Custom Calling Features are also available to ISDN BRI subscribers and are subject to rates and charges specified in Section 13. These charges are assessed on a per B Channel basis.

20 COMPANY Original Sheet INTEGRATED SERVICES DIGITAL NETWORK (ISDN) BASIC RATE INTERFACE (BRI) (Cont d) PACKET-SWITCHED DATA SERVICE DESCRIPTIONS Packet Switching is a service in which packets of data are individually addressed and combined on a transmission path with other addressed packets. Packet-Switched Data Service provides the ability to originate and receive X.25 packet data calls. X.25 is the Consultative Committee on International Telephone and Telegraph s (CCITT) recommended and internationally accepted standard for connecting data terminals to packet-switched networks. D-Channel Packet This service provides packet data on the D Channel at a maximum transmission throughput of up to 9.6 kbps per logical channel. B-Channel Packet This service provides packet data on the B Channel at a maximum transmission throughput of 64 kbps per logical channel. Included in Packet-Switched Data Service are the following features (where available): A. Hunt Groups An arrangement that allows an incoming call to a busy Packet directory number to search through a predetermined list of Packet directory numbers in search of a non-busy logical channel to complete the call. The hunting arrangement may be linear or circular. B. X.25 Data Services: 1. Logical Channels An arrangement that is a virtual circuit, offering multiple logical connections at the packet level of X.25. Logical Channels allow multiple packet calls (or virtual calls) to be active simultaneously on a single D Channel or B Channel. 2. DTE Support Feature The Data Terminal Equipment (DTE) Feature allows the network to prevent any network-to-user signaling on a virtual circuit associated with a Directory Number that is not included in the X.25 version. Virtual circuit communication is allowed between the subscriber s equipment and remote customer equipment that conforms to the X.25 version. This feature is available on a per Directory Number basis. 3. RPOA Selection The Recognized Private Operating Agency (RPOA) arrangement allows the user to specify an Inter-Exchange Carrier or transit network for inter-network calls on a per call basis. 4. Incoming/Outgoing Calls Barred This arrangement can either be used to prohibit a data terminal from receiving an incoming call or from originating outgoing calls. 5. Default Information Rate Assignment Features This arrangement allows the user to subscribe to a default information rate for each direction of communication for a virtual call. 6. Non-Standard Default Packet Sizes Feature This arrangement allows the user to subscribe to a larger maximum packet size for each direction of communication than the default 128 octets normally provided. To have this arrangement, the user must also have the Flow Control Parameter Negotiation Feature. 7. Flow Control Parameter Negotiation Feature This arrangement permits the negotiation on a per call basis of the flow control parameters and automatically negotiates the maximum packet size and window size for each direction of data transmission. 8. Throughput Class Negotiation An arrangement that allows the user to request specific throughput classes (bits/second) in the call request packet for each direction of data transfer associated with a virtual circuit. 9. Transit Delay Feature This arrangement allows the user to indicate a desired maximum transit delay in the call request packet on a per call basis. 10. Non-Standard Default Window Size An arrangement that allows the selection of the default window size of 1 through 7, instead of a standard window size of 2. To have this arrangement, the user must also have the Flow Control Parameter Negotiation Feature.

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