AT&T VOICE OVER IP CONNECT SERVICE

AT&T Voice Over IP Connect Service Page 1 of 12 AT&T VOICE OVER IP CONNECT SERVICE This Attachment describes the various component service elements that comprise the Wholesale AT&T Voice Over IP Connect Service ( AVOICS ). The only AVOICS Services provided under this Agreement are those identified as services provided in the AVOICS Service Terms and Pricing Attachment entered into herewith. AVOICS is not interoperable with any AT&T tariffed services, features or capabilities, except to the extent as may be expressly set forth in this Agreement. 1. SERVICE DESCRIPTIONS 1.A) AT&T Voice Over IP Connect Service AVOICS is a wholesale service for Service Providers ( Service Provider ), based in the continental US, who require the establishment of voice over internet protocol ( VOIP )- based connectivity to AT&T s network for long distance call termination. AVOICS provides unbranded and unbundled transport over the AT&T network, as well as termination. AVOICS will provide long distance termination of Native IP Traffic, defined as (i) traffic that originates as IP from the originating caller, and (ii) is then transported as IP from the Service Provider to AT&T. AVOICS may also provide long distance termination of Nonnative IP Traffic, defined as (i) traffic that originates as TDM from the originating caller, and (ii) is then transported as IP from the Service Provider to AT&T.

AT&T Voice Over IP Connect Service Page 2 of 12 1.A.1. Signaling The only signaling protocol that AVOICS will accept from the CUSTOMER network is Session Initiation Protocol SIP signaling per the guidelines described in RFC 3261. CUSTOMER SIP equipment must be able to perform synchronous session negotiation per the guidelines described in RFC 3264. 1.A.2. Encoding AVOICS will support, on a call-by-call basis, the following CUSTOMER codecs: G.711 and G. 729 A/B. 1.A.3. Call Types and Media 1.A.3.a) AVOICS accepts U.S.-originated domestic outbound (1+) calls and U.S.- originated international outbound (011+) originated calls. U.S.-originated refers to calls originated from all NPAs within the continental United States, Alaska, Hawaii, Guam, The Commonwealth of the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands. 1.A.3.b) All domestic outbound (1+) calls must be ten (10) digits in length (i.e., NPA-NXX-XXXX). Domestic calls with other than 10 digits will not be accepted. 1.A.3.c) AVOICS will also provide unbranded directory assistance (NPA-555-1212) for the Domestic US, Canada and Puerto Rico. 1.A.3.d) CUSTOMER agrees to send AT&T only the call types that are accepted on AVOICS as described in this Section 1.A.3. AVOICS does not accept any other call types, including calling card calls, person-to-person calls, collect

AT&T Voice Over IP Connect Service Page 3 of 12 calls, third-number billed calls, and calls to 500, 700 {except for 710 GETS (Government Emergency Telecommunications Service)}, 8yy, 900, 911, or other special Service Area Codes. 1.B) AT&T Voice Over IP Connect Service 1+ Outbound Direct Domestic Rate Elements AVOICS for domestic traffic termination has an unbundled rate structure with separate rate elements for Connectivity Facilities, Transport and Terminating Access. 1.B.1. Connectivity and Facilities 1.B.1.a) The required Connectivity for AVOICS is MIS-PNT and is purchased under a separate attachment, such as, an AT&T Managed Internet Service ( MIS ) Wholesale Pricing Schedule, which will include the associated pricing elements. 1.B.1.b) CUSTOMER will deliver calls to the MIS-PNT port using one or more direct T1, T3, OC3, OC12 or OC48 dedicated facilities. 1.B.1.c) CUSTOMER is responsible for obtaining the direct dedicated facilities from AT&T or a local access provider at its own expense. If purchased from AT&T, such service will be acquired through the appropriate agreement, such as, the AT&T Service Guide, and/or an AT&T Data Service Terms and Pricing Attachment and/or the AT&T MIS Wholesale Pricing Schedule.The AT&T Service Guide is located at http://www.serviceguide.att.com/abs/ext or http://www.att.com/abs/serviceguide or such other AT&T designated location. 1.B.1.d) CUSTOMER is required to utilize separate, dedicated IP addresses as the source signalling address for Native IP Traffic and Non-native IP Traffic.

AT&T Voice Over IP Connect Service Page 4 of 12 1.B.1.e) IP Address Assignment and Provisioning 1.B.1.e.1. AT&T will assign IP Address(es) for each traffic type, Native and Non-native and provision those IP Address(es) in the AT&T network elements. CUSTOMER is responsible to provision the AT&T assigned IP address(es) in CUSTOMER s network. 1.B.1.e.2. Except for IP addresses expressly registered in CUSTOMER's name, all IP addresses shall remain, at all times, property of AT&T and shall be nontransferable and CUSTOMER shall have no right to use such IP addresses upon termination or expiration of the Service Terms and Pricing Attachment for AVOICS.. 1.B.2. Transport 1.B.2.a) AT&T will transport calls received from the CUSTOMER to the point of termination. The Transport Usage Rates are as provided in the AVOICS Service Terms and Pricing Attachment. 1.B.2.b) AT&T will provide a separate Transport Usage Rate for Native IP Traffic and Non-native IP Traffic. 1.B.3. Termination Rates 1.B.3.a) AT&T will deliver calls received from the CUSTOMER for termination to the called party. The Termination Rates are as described in the AVOICS Service Terms and Pricing Attachment. 1.B.3.b) AT&T will provide separate Termination Rates for Native IP Traffic and Non-native IP Traffic.

AT&T Voice Over IP Connect Service Page 5 of 12 1.C) AT&T Voice Over IP Connect Service International Outbound Direct Rate Elements 1.C.1. AVOICS for International termination has a bundled rate structure for transport and termination. The rates are as described in the AVOICS Service Terms and Pricing Attachment. 1.C.2. CUSTOMER may use the same Connectivity and Facilities that it uses for Domestic traffic for for International calls or purchase separate Connectivity and Facilities in the same manner as described in Section 1.B.1 above for Domestic traffic. 1.C.3. Native and Non-native definitions still apply to International traffic. 1.C.4. Native International traffic will be treated as Native IP traffic but will be displayed as a Non-Native call on the AVOICS invoice and call detail records. 1.D) Unbranded Directory Assistance Service 1.D.1. Unbranded Directory Assistance Service provides unbranded domestic directory assistance for call types, sent to AT&T via the AVOICS Service, in the following format NPA-555-1212 (where "NPA" is the area code for the telephone number being sought). 1.D.2. A Directory Assistance agent will provide the telephone number associated with a name and address supplied by the caller, if available, for up to two directory listings per call, for locations in the Domestic U.S. (including Alaska and Hawaii), Puerto Rico and Canada. Unbranded Directory Assistance Service does not include toll free directory assistance.

AT&T Voice Over IP Connect Service Page 6 of 12 1.D.3. The rates for Unbranded Directory Assistance are as described in the AVOICS Service Terms and Pricing Attachment. 1.D.4. Unbranded Directory Assistance, regardless of its origination, will be treated as Non-Native IP Traffic. 1.E) Declarations 1.E.1. Native IP Traffic 1.E.1.a) CUSTOMER represents and warrants that each call originated to AT&T meets the criteria for Native IP Traffic defined in Section 1.A. above. 1.E.1.b) By executing the Agreement with this Attachment, CUSTOMER represents and warrants that, with respect to Native IP traffic: (i) it is a Service Provider and (ii) CUSTOMER s VoIP Services are lawfully being provided in compliance with FCC Order 04-97 released April 21, 2004 or any subsequent FCC ruling or ruling from a court of competent jurisdiction, or any other governmental entity or authority. 1.E.2. Non-Native IP Traffic 1.E.2.a) For Non-native traffic, CUSTOMER certifies it is a "common carrier" as defined in the Communications Act of 1934 (see 47 USC 153(10) and 211), with all required operating authority. CUSTOMER further certifies either (a) it has filed an FCC Form 499-A with the Federal Communications Commission (individually or on a consolidated basis) in accordance with the registration requirement of 47 C.F.R. 64.1195, or (b) it will not resell interstate telecommunications service(s) provided by AT&T under this Agreement,

AT&T Voice Over IP Connect Service Page 7 of 12 unless it first registers with the Federal Communications Commission in accordance with the registration requirement of 47 C.F.R. 64.1195. 1.E.3. Calling Party Number 1.E.3.a) CUSTOMER agrees to conform to applicable regulations and orders of the Federal Communications Commission and State regulatory bodies regarding the transmittal to AT&T of Calling Party Number ( CPN ), for use by AT&T, and for transmittal to Local Exchange Carriers ( LECs ). All originating Calling Party Numbers ( CPNs ) must be ten digits in length. 1.E.3.b) AT&T will use the CPN to determine the originating location of the call, and the Local Routing Number ( LRN ) to determine the terminating location, for purposes as described in the AVOICS Service Terms and Pricing Attachment. 1.F) Tax Obligations 1.F.1. Tax Situs 1.F.1.a) CUSTOMER must provide the geographically significant NPA-NXX of the CUSTOMER Router location, for each CUSTOMER site. AT&T will use the CUSTOMER provided NPA-NXX as the tax situs for calls originating to AT&T via AVOICS. 1.F.2. Tax Exemption 1.F.2.a) CUSTOMER is responsible to provide AT&T with documentation, e.g.; state tax exemption certificates and waivers, if exempt from various federal and state transaction taxes. CUSTOMER shall pay any applicable taxes

AT&T Voice Over IP Connect Service Page 8 of 12 (excluding those on AT&T's net income), fees, duties, levies and other similar charges (and any related interest and penalties) relating to the sale, transfer of ownership, installation, license, use or provision of the Services, except to the extent customer provides a valid exemption certificate to AT&T prior to the delivery of Services. 1.F.3. Rules and Regulations 1.F.3.a) Native IP Traffic is an Enhanced Service. Regulated surcharges (e.g., USF, PUC fees) generally will not apply except in certain jurisdictions (e.g., Texas and California). For tax purposes it will be treated as a telecommunications service. 1.F.3.b) Non-native IP Traffic is an Enhanced Service, but regulated surcharges (e.g., USF, PUC fees) will apply. For tax purposes it will be treated as a telecommunications service. 1.G) Carrier Identification Code 1.G.1. A Carrier Identification Code ( CIC ) is not a requirement of AVOICS. If CUSTOMER is going to signal a CIC(s), CUSTOMER is responsible to register the CIC(s) with AT&T prior to service delivery. 1.G.2. If CUSTOMER does not provide a CIC, substitute data will be provided in the Carrier Identification Code ( CIC ) label of the AT&T Call Detail Record ( CDR ). CUSTOMER may not use such substitute data for any purpose other than in connection with the AVOICS Service.

AT&T Voice Over IP Connect Service Page 9 of 12 1.H) Service Forecasting CUSTOMER shall provide to AT&T, on a quarterly basis, a written forecast of anticipated service volumes, 12 months in advance, for AVOICS, provided under this Agreement, for the Term of the Agreement, as set forth in the AVOICS Service Terms and Pricing Attachment. 1.I) Fraud Management CUSTOMER shall take reasonable measures to protect against fraudulent usage of the AVOICS services, including implementing systems and procedures to monitor, detect, and prevent fraud. CUSTOMER will be liable for any charges for the use of the AVOICS service under this Agreement resulting from fraudulent usage or other unauthorized calling, regardless of whether or not the fraudulent usage or unauthorized calling was or could have been detected by AT&T. 2. SERVICE DELIVERY 2.A) Customer Care 2.A.1. Customer Care will be staffed to provide order processing, technical review, provisioning, testing and turn up support, trouble ticket receipt, ongoing maintenance, project management, and billing account inquiry for the AVOICS service. 2.A.2. The parties will exchange lists of contact personnel and phone numbers for each service and function. Updates will be made and distributed as appropriate. 2.A.3. CUSTOMER is responsible for all End User Customer Care operations and support. CUSTOMER is also responsible for all End User billing and support.

AT&T Voice Over IP Connect Service Page 10 of 12 2.B) Ordering 2.B.1. Ordering for AVOICS will be accomplished via electronic mail or facsimile service request forms provided by AT&T. 2.B.2. CUSTOMER will be required to participate in a technical questionnaire to insure complete and accurate information is documented for service installation. 2.B.3. Target due dates and provisioning status will be provided to CUSTOMER. 2.B.4. CUSTOMER will be required to perform test calls during test and turn up of the Service. 3. SERVICE ASSURANCE 3.A) Maintenance 3.A.1. Trouble Reporting 3.A.1.a) If CUSTOMER encounters a maintenance issue, a trouble can be reported to the AT&T service center via toll free number, 24 hours a day, 365 days a year. 3.A.2. Trouble Ticket Tracking 3.A.2.a) After receipt of the trouble ticket, AT&T will issue a trouble ticket number which will be used as a reference for tracking and requesting status. Upon successful correction of the maintenance issue, the service center will advise CUSTOMER that the trouble has been resolved.

AT&T Voice Over IP Connect Service Page 11 of 12 3.A.3. Support 3.A.3.a) Maintenance support will be available to CUSTOMER 24 hours a day, 365 days a year. 4. BILLING INFORMATION AND INVOICING 4.A) Call Detail 4.A.1. Call Detail Records (CDRs) 4.A.1.a) AT&T will provide a single, rated Call Detail Record (CDR) for each completed AVOICS call. 4.A.1.b) AT&T will provide a layout with the format for call records to CUSTOMER. To the extent practical, AT&T shall notify CUSTOMER, in writing, of any modification in the format of the Call Detail Records prior to the first delivery of such modified call records. 4.A.2. Media Type and Frequency 4.A.2.a) Electronic File Transfer: CUSTOMER may elect to have CDRs provided in flat file format via Connect Direct or a comparable system. CDRs provided via Electronic File Transfer will be provided six (6) days a week, excluding Sundays. AT&T and CUSTOMER will establish a daily transmission schedule for CDRs. 4.A.2.a.1. For Electronic File Transfer, CUSTOMER will need to separately arrange and pay for a direct T1 circuit between AT&T's billing system and CUSTOMER's billing system, with appropriate routers.

AT&T Voice Over IP Connect Service Page 12 of 12 4.A.2.b) CD ROM: As an alternative to Electronic File Transfer, CUSTOMER may elect to have CDR records sent on a monthly basis via CD-ROM. 4.A.3. Error Reporting 4.A.3.a) CUSTOMER will identify any CDR transmitted by AT&T to CUSTOMER that it believes is subject to a formatting or transmission error and return it to AT&T with an error report identifying the applicable error code within fifteen (15) days after the CDR s initial transmission date. 4.A.3.b) CDR errors will be corrected by AT&T and returned to CUSTOMER within fifteen (15) days of AT&T s receipt of an error report, pursuant to Section 4.A.3.a), or within 60 days after the Call Record origination date, whichever is greater. 4.B) Completed Call For AVOICS, a completed call is a call for which an answer is received by the AT&T network, with a call duration 1.0 seconds or greater. AVOICS will bill for all calls 1.0 second or greater. The CDRs will only reflect completed calls. 4.C) Monthly Invoice 4.C.1. AT&T will render a monthly, consolidated summary invoice to CUSTOMER for the AVOICS service. Certain associated charges, including but not limited to connectivity and facility charges, as described in the AT&T Service Guide and/or in Service Terms and Pricing Attachments, may appear on a separate bill. --------------------------------------- End of Attachment -------------------------------------