Technical References
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| TR Number and Publication Date | TR Title | Read an Overview | Get Document by Format |
| TR 41458 October 1996 | Special Access Connections to the AT&T Network | PDF (328 Kb) | |
| TR 41459 June 1999 | AT&T Network ISDN Primary Rate Interface and Special Application Specification User - Network Interface Description | PDF (1.59 Mb) Paper copy | |
| TR 50010 December 1997 | AT&T ISDN Basic Rate Interface Reference Guide | PDF (138 Kb) | |
| TR 50075 September 1999 | AT&T Toll Free Transfer Connectsm Service | PDF (141 Kb) | |
| TR 54014 May 1992 | ACCUNET® T45 and T45R Service Description and Interface Specification | Paper copy | |
| TR 54016 September 1989 | Requirements for Interfacing Digital Terminal Equipment to Services Employing the Extended Superframe Format | Paper copy | |
| TR 54018 November 1991 | OC-3 Optical Interface Specifications | Paper copy | |
| TR 54022 February 1997 | Intelligent Call Processing (ICP) Service Signaling System No. 7 Network Interface Specification | Paper copy | |
| TR 54077 July 1998 | AT&T Private Line Service OC-12 Service Description and Interface | PDF (111 Kb) | |
| TR 54078 November 1998 | AT&T Private Line Service OC-48 Service Description and Interface Specification | PDF (112 Kb) | |
| TR 54079 September 1999 | AT&T Private Line Service OC-192, Service Description and Interface Specification | PDF (114 Kb) |
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