700 West Mineral Littleton, CO 80120

Feature Group B and D carrier Identification Code Expansion UPDATE 3/5/98

Original Disclosure Date: April 23,1993
Revision to Network Disclosure News #110

This Network Disclosure News announces U S WEST's intent to comply with Second Further Notice of Proposed Rulemaking, CC Docket 92-237, FCC 97-386, released 10/22/97 and end the permissive dialing period for 5 digit CAC's. U S WEST Communications will begin rejecting the 5 digit CAC and forward the call to an announcement beginning June 30, 1998. It is estimated that the office conversion will phase in over a two month period with full implementation of rejecting the 5 digit CAC's by August 30,1998. The original disclosure is reiterated here to eliminate confusion and give provide background information.

Summary:	The North American Numbering Plan Administrator (NANPA) has announced the pending exhaust of Carrier Identification Codes (CIC's) utilized with Feature Group B and Feature Group D switch access. Expansion of CIC's Will take place in two phases. The first phase eliminated the joint administration of FGB and FGD assignments and expanded the FGB CIC's from 3 digits to 4 digits. This phase occurred 1Q93. The second phase expands the FGD CIC's from 3 digits to 4 digits and is targeted for 1Q95. During the first phase, the format for FGB CIC was expanded from 950-WXXX (where W = 0 or 1 and X = any number 0 through 9) to the new format of 950-XXXX . During this period the FGD format remained 10XXX. Various switching systems had to be updated with the appropriate software to accommodate this change. The second phase will expand the FGD CIC format from 10XXX to 101XXXX where the X's represent the CIC and the complete format is called the Carrier Access Code (CAC). All equal access switching systems must be equipped to distinguish between a 5-digit 10XXX and a 7-digit 101XXXX format prior to the NANPA assignment of the first 4 - digit FGD CIC, 1Q95 A permissive dialing period will be allowed. However, a fully converted end office must be prepared to receive either a 5-digit or 7-digit CAC from an originating line during the permissible dialing period and then be capable of rejecting a 5-digit CAC and forwarding the call to an announcement when the permissive dialing period ends. The current format is capable of accommodating 1000 3-digit assignments. Once full expansion is achieved, 10,000 assignable CIC's will be available. Users of customer premises equipment, i.e., auto dialers, PBX's, etc., should ensure that their systems are reprogrammed to adhere to the expanded CIC dialing format.
Location and Timing of Deployment:	Four digit CIC's and 7 digit CAC's are available in all U S WEST Communications central offices. The permissive dialing period will end June 30, 1998.
Additional Information Contact:	Customer premises equipment vendors/manufactures or enhanced service providers desiring additional information regarding the expansion of FGB and FGD CIC's should contact their respective U S WEST Communications Service Center or call/ write: Lynda Uleman 1314 DOTM Rm 6th Floor Omaha, Nebraska 68102 Phone: 402-422-5939 Fax: 402-422-8059
NOTE: This announcement has been released in accordance with the FCC Rule 51.333(a), Certification of Short Term Public Notice.

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