700 West Mineral Littleton, CO 80120

Wireless Carrier Interconnection to the E911 Emergency Services Network UPDATE 3/3/98

Original Disclosure Date:	October 23, 1996
Revision to Network Disclosure News #407
The purpose of this disclosure is to announce additional capability to the wireless E911 network. U S WEST announces support of a Signaling System 7 (SS7) solution for delivery of E911 information to PSAP's from Wireless carriers. The SS7 solution is in additional to the currently available feature group D solution. The SS7 solution will greatly enhance the delivery speed of the information to the PSAP's. Due to the additional interfaces, this disclosure completely replaces disclosure #407.
Summary:	Phase One of FCC Docket 94-102 mandates that wireless carriers must forward a pseudo Automatic Number Identification (ANI) and the ten digit calling party number (MIN) to the correct Public Service Answering Point (PSAP) when their customer mades a 911 call. Compliance with Phase One of this Docket is required by April of 1998. U S WEST Communications, Inc. (USWC) previously announced, via Network Disclosure Announcement #316, dated October 23, 1996, compliance with the Docket by providing direct wireless carrier interconnection to the E911 Emergency Services Networks. The announcement further stated that the interconnecting trunks would employ the end office to interexchange carrier format of the Feature Group D (FG D) signaling protocol. It has come to USWC's attention that certain wireless carriers may not currently have that signaling protocol format capability. Therefore, U S WEST Communications (USWC) intends to also make available to wireless carriers interconnection using the end office to interexchange carrier via the access tandem format of FG D signaling protocol capability. These interconnecting trunks will allow the wireless carrier to send both a seven digit or ten digit pseudo Automatic Number Identification (ANI) as the routing number and the full ten digit number of the calling unit. These numbers will enable USWC to route the call to the appropriate PSAP, and the PSAP to call the initiating subscriber back in the event of an inadvertent disconnect. As previously announced, the employment of FG D signaling protocol for wireless carrier interconnection to the E911 network is a new use for the signaling protocol. This arrangement is not detailed in any technical document covering E911 interconnection and may impact wireless service provider's equipment. This announcement serves as notification of this new method of interconnection. SS7 SOLUTION U S WEST also intends to make available to wireless carriers an interconnection to the E911 Emergency Services Network based on ANSI/TIA/EIA-41 Cellular Radiotelecommunications Intersystem Operations (formerly IS-41 Rev. C) Mobility Application Part (MAP) protocol encapsulated in Transaction Capabilities Application Part (TCAP) messages over a Common Channel Signaling System 7 (CCS/SS7) network interconnection. The Signaling Systerm 7 (SS7) signaling protocol requires TCAP transport and specialized message sets to communicate with a Wireless 911 Service Control Point (SCP) to determine routing digits and provide the Automatic Location Identification (ALI) database with the Call-Back number of the wireless caller, to adhere to Phase I requirements of FCC Docket No. 94-102. The specialized TCAP message sets will enable Wireless Service Providers (WSP's) that support ANSI/TIA/EIA-41 capabilities to utilize MAP and TCAP protocols over SS7 A or D links to interface with U S WEST Signaling Transfer Points (STP's) for handoff to the U S WEST provided 911 SCP. To initiate the SS7 based messages into the U S WEST Signaling Network, a WSP's Mobile Switching Center (MSC) will connect to the US WEST Local STP via SS7 links. The interface requirements are provided below under the heading "Interface Specifications." The WSP's MSC will send an ANSI/TIA/EIA-41 based TCAP message to the U S WEST Local STP, which will in turn be routed to the 911 SCP. This query message will take the form of an OriginationRequest (9-1-1) Invoke and the associated response message will be an OriginationRequest (9-1-1) Return Result. The message set details are listed later in this document under the heading "Message Format".
Locations and Timing of Deployment:	The following represents a revised deployment schedule. This information is subject to change. U S WEST's Local STP Locations State Pair / LATA Location Name ARIZONA Phoenix Deer Valley Mesa ARIZONA Tucson Tucson Main Tucson East COLORADO Colorado Springs Colorado Springs Main Pueblo Main COLORADO Denver Dry Creek Denver Main IDAHO Idaho Boise Pocatello IOWA Cedar Rapids Cedar Rapids Downtown Waterloo Downtown IOWA Davenport Davenport Downtown Davenport East IOWA Des Moines Des Moines Mason City IOWA Sioux City Sioux City Downtown Spencer MINNESOTA Duluth Duluth Melrose Virginia MINNESOTA Minneapolis Beard St. Paul MINNESOTA Rochester Owatonna Windom MONTANA Billings Billings Bozeman MONTANA Great Falls Helena Missoula NEBRASKA Omaha Douglas "O" Street NEW MEXICO New Mexico Albuquerque East Albuquerque Main NORTH DAKOTA Brainerd / Fargo Fargo Grand Forks OREGON Portland Belmont Capital OREGON Eugene Eugene Medford SOUTH DAKOTA South Dakota Rapid City Sioux Falls UTAH Utah Kearns Provo WASHINGTON Seattle Seattle Main Seattle East WASHINGTON Spokane Spokane Riverside Yakima Chestnut WYOMING Wyoming Cheyenne Casper
Pricing:	Individual case basis.
Interface Specifications:	Entities that are interconnecting to the U S WEST SS7 network can do so through the Local Signaling Transfer Points (LSTPs). The interconnection arrangements can be done through A-links or D-links based upon the arrangement that the Interconnecting Network (ICN) is capable of supporting. STP gateway screening tables will be individually translated for each link set by the appropriate U S WEST personnel to permit the Request message sets to enter the U S WEST Network. ICN STP to U S WEST STP The ICN mated STP pair is interconnected to the U S WEST mated STP pair by way of quad"D" (Diagonal) links. Three physically diverse link facility routes are strongly recommended. U S WEST will effectuate and maintain link diversity from the geographically separated U S WEST Communications Inc. Signaling Transfer Point to the ICN Signaling Point of Interface (SPOI) per a joint agreement. ICN MSC to U S WEST STP The ICN MSC is interconnected to the U S WEST mated STP pair by way of dual "A" (Access) links. U S WEST will effectuate and maintain link diversity from the geographically separated U S WEST Communications Inc. Signaling Transfer Point to the ICN Signaling Point of Interface (SPOI) per a joint agreement. Link Transport Architecture Link Architecture: Each CCS signaling link must provide digital bi-directional transmission. Each full duplex signaling link shall operate at the 56 kbit/s data rate and occupy a single DS0 (64 kbit/s) channel of a 24 channel DS1 digital transmission system. The DS0-A channels (links) are multiplexed into a DS1 format for hand off at the Network Interface (NI); the point of interconnect between the U S WEST Communications, Inc. Network and the ICN. Facility Architecture: A synchronized DS1 (1.544 Mbit/s rate) terrestrial digital facility is required. The facility must be channelized, and comply with the requirements given in Bellcore Technical Reference GR-342-CORE, "High-Capacity Digital Special Access Service -Transmission Parameter Limits and Interface Combinations." Additional Notes: - The DS1 facility does not require Clear Channel Capability (CCC) and may have robbed-bit signaling. - DS1 Extended Superframe (ESF) format is strongly recommended. - DS1 Superframe (SF) may be used, but is not recommended. Message Format The following section will define the query and response messages that will be sent between WSPs MSC and the U S WEST Local STP. There are two scenarios for the message format based on the type of interconnection the WSP choose to utilize, either A or D links. For the query messages (MSC to U S WEST Local STP), it is expected that these messages will be distributed across a linkset for load balancing purposes. OriginationRequest (9-1-1) Invoke - "A" link interconnection MTP layer DPC OPC SLS Message Type=UDT 0 0 0 0 0 0 0 0 Pointer to Called Party Address Field Pointer to Calling Party Address Field Pointer to TCAP data LI of CdPA field 1 0 0 0 1 0 0 1 Called Party Address Field SSN = 0 TT = *250 (MIN to 911 SCP) GTA Digits = MIN LI of CgPA Field 1 1 0 0 0 0 1 1 Calling Party Address Field SSN = SSN for MSC 911 Application Point Code of MSC Length Indicator of TCAP Data Field TCAP Data Field (see TCAP query content) *Note - Interim assignment until National Translation Type is assigned OriginationRequest (9-1-1) Invoke - "D" link interconnection MTP layer DPC OPC SLS Message Type= UDT 0 0 0 0 0 0 0 0 Pointer to Called Party Address Field Pointer to Calling Party Address Field Pointer to TCAP Data Field LI of CdPA field 1 0 0 0 1 0 0 1 Called Party Address Field SSN = 0 TT = *250 (MIN to 911 SCP) GTA Digits = MIN LI of CgPA Field 1 1 0 0 0 0 1 1 Calling Party Address Field SSN = SSN for MSC 911 Application Point Code of MSC Length Indicator of TCAP Data Field TCAP Data Field (see TCAP query content) *Note - Interim assignment until National Translation Type is assigned TCAP Data Field - OriginationRequest (9-1-1) Invoke OriginationRequest (Invoke) Parameters TCAP Package Type: Query with Permission Transaction ID Component Sequence Component Type: Invoke (last) Component ID Operation Code: National TCAP Parameter Set BillingID (originating) Digits (dialed) ElectronicSerialNumber MobileIdentificationNumber MSCID (originating MSC) OriginationTriggers TransactionCapability LocationAreaID OriginationRequest (9-1-1) Return Result MTP layer DPC OPC SLS Message Type= UDT 0 0 0 0 0 0 0 0 Pointer to Called Party Address Field Pointer to Calling Party Address Field Pointer to TCAP Data Field LI of CdPA field Address Indicator Called Party Address Field SSN = SSN for MSC 911 Application LI of CgPA Field Address Indicator Calling Party Address Field SSN = SSN for 911 SCP Length Indicator of TCAP Data Field TCAP Data Field (see TCAP query content) TCAP Data Field - OriginationRequest (9-1-1) Return Result OriginationRequest (Return Result) Parameters TCAP Package Type: Response Transaction ID Component Sequence Component Type: Return Result (last) Component ID Parameter Set Digits (Routing)
Technical Reference:	The following document contains information regarding the characteristics of the signaling protocol and format requirements for FG D: Bellcore documents: SR-TSV-002275, Bell Operating Company (BOC) Notes on the Local Exchange Carrier (LEC) Networks, Section 6.15.5.4, Issue 2, April of 1994 Price: $435.00 The following document contains information regarding the characteristics of the signaling protocol and format requirements for the SS7 solution: Bellcore documents: GR-342-CORE, "High-Capacity Digital Special Access Service -Transmission Parameter Limits and Interface Combinations." Issue 1, December 1995 Price: $200.00 U S WEST's Technical Publications: #77200 - "DS1 Service and Synchronization Service" Price $45.00 #77375 - "1.544 Mbit/s Channel Interface Technical Specifications for Network Channel Interface Codes Describing Electrical Interfaces at Customer Premises and at U S WEST Communications, Inc. Central Offices" Price $62.50 ANSI documents: Information relative to the Mobility Application Part (MAP) protocol is contained in "ANSI/TIA/EIA-41 Cellular Radiotelecommunications Intersystem Operations (formerly IS-41 Rev. C)" Price - Free Bellcore publications can be obtained by contacting: Bellcore Customer Relations 8 Corporate Place, Room 3A-184 Piscataway, NJ 08854-4196 Fax: (908) 336-2559 Phone: (800) 521-CORE (2673) (U.S. and Canada) Phone: (908) 699-5800 (Others) 77200 77375 U S WEST publications can be obtained by contacting: Faison Office Products Company 3251 Revere Street, Suite 200 Aurora, CO 80011 or call (800) 777-3672 FAX Number (303) 340-1905 ANSI Publications can be obtained by contacting: Telecommunications Industry Association / Electronics Industry Association(TIA/EIA) 2500 Wilson Blvd., Suite 300 Arlington, VA 22201 Phone: (703) 907-7700
Additional Information Contact:	Additional questions regarding the direct wireless carrier interconnection to the E911 Emergency Services Network using FGD signaling can be directed to: Mr. Gerry Coe Technical Industry Issues Management U S WEST Communications 700 W. Mineral, Room MN D20.12 Littleton, CO 80120 or call: 1-303-707-7002 FAX: 1-303-707-9578 Additional questions regarding the direct wireless carrier interconnection to the E911 Emergency Services Network using utilizing the SS7 network can be directed to: Mr. Jim Carroll 911 Product Manager New Product Development 200 S. 5th St 18th Floor Minneapolis, MN Telephone : 612 663-4231

NOTE: This announcement has been released in accordance with the FCC Rule 51.333(a), Certification of Short Term Public Notice.

Questions regarding Network Disclosure information can be referred to the individual listed on the Disclosure Announcement, or contact Jamal Boudhaouia, CenturyLink's Manager of Network Disclosures at Jamal.Boudhaouia@CenturyLink.com or (303) 707-8561.