at&t - 2"d Revised Sheet 2 - 4th Revised Sheet th Revised Sheet llth Revised Sheet 8 Dear Ms. Wilson:

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1 at&t November 6, 007.i...I,., :. - Edward Drllltng AT&T Arkansas T: F: 50f09D Uttla ROCk AA fol Ms. Diana Wilson Arkansas Public Service Commission 000 Center Street 70 Dear Ms. Wilson: Attached are an original and four copies of the following tariff sheets: Inteqrated Services Tariff Table of Contents - 6th Revised Sheet - "d Revised Sheet Section - 7'" Revised Sheet - th Revised Sheet.0-6th Revised Sheet.0 - llth Revised Sheet 8 This filing defines d SmartTrunk Serving Arrangement and changes the application of the SmartTrunk Inform 9 optional rate element to allow the element to apply to an entire arrangement, rather than the customer being required to purchase it for each interface or port. This tariff filing is being issued on November 6, 007 with an effective date of November 7, 007. Please date-stamp a receipt copy of this filing and return one copy of the tariff sheets to us indicating the official Commission filing date. Questions regarding this filing may be directed to Lisa Lake at (50) Best Regards,

2 No supplement to this tariff will b A ' bntegrated SERVICES TARIFF Table of Contents of canceling this tariff. 6th Revised Sheet INTEGRATED SERVICES TARIFF Preface Application of Tariff TABLE OF CONTENTS (Explanation of Symbols) - Sheet A. INTEGRAT'ED SERVICES DIGITAL CIRCUIT SWITCHED VOICE (CSV)/CIRCUIT SWITCHED DATA (CSD) TRANSPORT. Flat Month y Rate. Measured Monthly Rate. Discount Periods. Reserved for Future Use.5 Non-Optional Extended Area Service (EAS).6 Optional Calling Plan.7 Promotional Offerings.8 Charges Refated to Customer Activity.9 Miscellaneous. DIGITAL LOOP SERVICE. General. Service Description. Service Components. Regulations.5 Moves.6 Supersedure.7 Suspension of Service Initiated By The Customer.8 Technical Specifications.9 Rate and Charge Application.0 Optional Features.Rate and Charge Schedule.Customer S ecific Pricing 8 {CT). SuperTrunk Southwestern Bell Telephone Company d/b/a ATdT Arkansas

3 No supplement to this tarif will A I%TEdS;ATED SERVICES TAR FF Table of Contents of canceling this tariff. nd Revised Sheet ~EcENED INTEGRATED SERVICES TARCFF TABLE OF CONTENTS (MT) ICT). PRIMARY RAm ISDN: SMARTTRUNK'. General. Service Description. Service Components (CT). Standards Compliance.5 Technical Specifications.6 Regulations.7 Additions.8 Moves.9 Supersedure.0Suspension of Service Initiated By the Customer. Service Terms. Rate and Charge Application.Ratle and Charge Schedule (MT). Customer Specific Pricing (CT). DIGILINE SERVICE. General. Service Description. Service Components. Technical Specifications (CTI.5 Regulations.6 Service Term (CT).7 Special DigiLine Service Requests (CT).8 Moves.9 Supersedures.0Suspension of Service.Rate and Charge Application.Rate and Charge Schedule 5. MISCEIJANEOUS SERVICES 5. Digital Packet Switching Usage (Obsolete) 5. Digital Customer Alerting Service (Obsolete) Southwestern Bell Telephone Company d/b/a AT&T Arkansas

4 No supplement to this tariff will N G TED SERVICES TARIFF U-l NGV b A 9' Section of canceling this tariff. 7th Revised Sheet INTEGRATED SERVP W&w. PRIMARY RATE ISDN: SMART!I!RUNK@. General All rates, charges, terms and conditions set forth herein provide for the furnishing of service where suitable facilities and equipment are available in the customer's serving office and do not create an obligation for the Company to construct such facilities or equipment especially for the provisioning of this service.. Servicm Description.. Primary Rate ISDN SmartTrunk - (herein after referred to as SmartTrunk or SmartTrunk service) Provides access to and from the Public Switched Telephone Network (PSTN) for Circuit Switched Voice ICSV) and Circuit Switched Data (CSD) communications. SmartTrunk service is provided using Integrated Services Digital Network (ISDN) architecture. ISDN services available with SmartTrunk service use Primary Rate Interface (PRI) technology. SmartTrunk service employs a.5 Mbps facility typically divided into twenty three B channels and one D channel. 0 channels are used for voice and data communications while the D channel provides out of band signaling. The transmission characteristics of this service support 6 Kbps Clear Channel Capability and Extended Superframe Format (ESF). Non facility associated signaling is available over SmartTrunk (where facilities exist). Direct Inward Dial (DID) numbers may or may not be assigned to these trunk groups. See the General Exchange Tariff, Miscellaneous Service Offerings, Section 9 for applicable DID rates. i I (AT).. SmarkTrunk Serving axangement - One or more SmartTrunk Interfaces and/or Ports which are designed to function as a single service group for inbound and/or outbound calling. All SmartTrunk Interfaces/Ports in a single Serving Arrangement terminate in the same piece of Customer.Premises Equipment (CPE). Southwestern Bell Telephone Company d/b/a AT&T Arkansas

5 No supplement to t his tariff will of canceling this tariff.. PRIMARY RATE ISDN: SMARTTRUNF?. Service Components DD NOV b ~T%&ED SERVICES TARIFF Section th Revised Sheet.0 XCEIVE~ INTEGRATED SERVICES TARIFF.....*.. SmartTrunk Interface (SI) - Provides the PRf termination and a digital multichannel transmission path between the central office and the customer's premise. Integrated Services Diqital CSV/CSD Transport Option - Provides for the local use of the PSTN. Only Integrated Service Digital CSV/CSO Transport Options, noted as "SmartTruck service Compatible" in Section of this tariff, can be associated with SmartTrunk service. This component is not required with tie line services. Dynamic Channel Allocation (DCA) - Allows a customer to designate the quantity of call types to be allocated within previously provisioned criteria for either DID OK DOD services. In equipped central offices, this feature will also include Common Line 800, Outward WATS, and tie line services. (This feature is also known in the industry as call-by-call service selection. Network Rinq Main (NRA) - Allows, in certain central offices, the customer to automatically complete calls made to busy stations of a different PRI connected PBX system served by the same central office switch. Issued: November 6r 007 Effective: November 7, 007 Southwestern B ell Telephone Company d/b/a AT&T Arkansas

6 No supplement to this tariff will r:, \ ','.,..,.,-,, L,i>l#l " :-..: I' INTEGRATED SERVICES TARIFF zuu- NOV b A k Section of canceling this tariff. 6th Revised Sheet.0 INTEGRATED SERTF~BN 0. PRIMARY RATE ISDN: SMARTTRUNK@ (eont'd). Service Components (conk' d) Link Extension - Provides the additional central office hardware and facility required to provide SmartTrunk service to a customer located in an exchange outside the non-optional local callinq scope of the SrnartTrunk equipped serving office. Application of this rate element is dependent upon the customer's location and the fact that the customer is served from the SmartTrunk serving office designated by the Company. Outward WATS Option - Provides the customer with the capability to originate Outward WATS calls over a SmartTrunk Interface os Port. Enhanced Alternata Route - Allows incoming voice calls to overflow on a disaster and busy basis to a line or trunk side connection designated by the customer. A route may be limited in the number of simultaneous calls that can be routed. Available where technical capabilities exist. Inform 9 - An optional upgrade feature which allows the Calling Party Number of the station to be Sent to the E9 database rather than the Billed Telephone Number. It is the customer's responsibility to provide station number updates to the 9 database. Available where technical capabilities exist. Southwestern 0ell Telephone Company d/b/a AT&T Arkansas

7 - No supplement to this tariff will I ' INTEGRATED SERVICES TARIFF Section of canceling this tariff. NOV b A 9 k th Revised Sheet 8 XNTE-TED. PRIMAFtY RATE ISDN: SMARTTRUNK@ (cont'd). Ratas and Charge Schedule () (cont'd) Installation Charge Description USOC Initial Additional() Monthly Rate Enhanced Alternate Route, per route defined () AORPI $ $ (CP) Inform 9, per SmartTrunk (CP) Serving Arrangement () ANLPl Station Record Detail, per SI or Port () SRQPl B Channel Transfer, per SI or Port BTPG $50.oo Redirected Number, per SI or Port RNPQ Rates and charges stated are in addition to those specified for DID, DOD, and Tie Line service in other tariffs of the Company and in Section of this tariff and are applied as stated in..9 and..c preceding. This charge applies only when an additional SI or Port is ordered and installed with an initial SI or Fort per customer, per request, per due date, per location. Installation charges for Enhanced Alternate Route, Station Record Detail and Inform 9 only apply when these features are added to existing SmartTrunk Interfaces or Ports. Installation charges for these features do not apply when ordered at the same time as the SrnartTrunk Interface or Port with which they are associated. Southwestern Bell Telephone Company d/b/a AT&T Arkansas