PUBLIC NOTICE of NETWORK CHANGE UNDER RULE 51.329(a)
Network Disclosure Number: / ATT20091102L.1 rev1 / Issue Date: / 04/23/2010
Modification Date: / 4th Qtr 2010
Carrier’s Name: / AT&T Midwest
Carrier’s Address:
Contact: / Your Account Manager or Service Representative

Technical Issues

Richard Hatch
3 AT&T Plaza, Rm. 915
Dallas, Texas 75202
214 858-1547

Public Notice: / can be obtained on the Internet at:
http://www.att.com/gen/public-affairs?pid=3137
Network Change:
This is a revision to the Dearborn collapse moving the implementation date from third quarter 2010 to fourth quarter 2010. AT&T Midwest will make changes necessary to collapse the existing Alcatel/Lucent 1AESS switch (DRBRMIDBCG0) located in the Dearborn Main Central Office, Dearborn, MI, into the collocated Alcatel/Lucent 5ESS switch (DRBRMIDBDS0). NPA-NXXs 313-277, 313-561, 313-562, 313-563, 313-565 and 313-724 will be moved from the DRBRMIDBCG0 1AESS to the DRBRMIDBDS0 5ESS.
Description of Type of Changes Planned: /
The purpose of this Network Discloser is to provide information regarding the collapse of the DRBRMIDBCG0 1AESS switch into the collocated DRBRMIDBDS0 5ESS switch during the third quarter of 2010.
Existing CLLI Code: DRBRMIDBCG0 (1AESS)
Existing Point Code: 250-050-048
Existing CLLI Code: DRBRMIDBDS0 (5ESS)
Existing Point Code: 250-050-043
LATA: 340 NPA: 313 NXX: 277, 561, 562, 563, 565, 724
Description of Reasonably Foreseeable Impact of the Planned Changes: /
AT&T Midwest, Independent LECs, Wireless Service Providers, CLECs and Interexchange Carriers will be affected for originating and terminating traffic involving NPA: 313 NXX: 277, 561, 562, 563, 565 and 724. This traffic must be re-homed from DBRBMIDBCG0 to end office DRBRMIDBDS0. CLECs must evaluate whether their existing trunk groups to DRBRMIDBDS0 are adequate to handle NPA: 313 NXX: 277, 561, 562, 563, 565 and 724 traffic and take appropriate action by third quarter 2010.
Location of Change: /
CLLI Code/Statewide / City / State / Implementation Date /
DRBRMIDBCG0 / Dearborn / MI / 4th Qtr 2010
To
DRBRMIDBDS0 / Dearborn / MI / 4th Qtr 2010