Common Systems Connection Standards AT&T Services, Inc
Date: August 31, 2007 ATT-TP-76450, Issue 9
Copyright ©2004 – 2006, AT&T Knowledge Ventures
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Page 20
Wire and Cable with UL Flammability Ratings of CMX and CMU must not be used within AT&T
central offices as UL Flammability Ratings must be MP/CM(same floor), MPR/CMR(Riser-
Between Floor) or MPP/CMP(Plenum Condition).
6.11 Central Office Copper Wire and Cable
Frame Wire, DS1 Cross-Connect Wire, Switchboard Cable, Tie Cables and T1 Cable
6.12 Central Office Copper Coaxial Cable
734C/1734C, 735C/1735C Single Conductor and Multiple Conductor Coaxial Cables
6.13 Central Office Copper "Bits" Synchronous Timing Cables
1175A Red Jacketed Bits Timing Cable for all regions except Legacy AT&T, which will use gray
jacketed 1175A.
6.14 Central Office Copper Wire and Cable Minimum Inside Bend Radius
For Switchboard, Shielded and Twin Conductor Cable, 5X the Cable Diameter
6.15 Central Office Copper Coaxial Cable Minimum Inside Bend Radius
For Non-Bundled 734 or 735 Type Coaxial Cable and for Bundled 734 Type Coaxial Cable, 7X
the Cable/Bundle Diameter.
For Bundled 735 Type Coaxial Cable, 10X the Bundle Diameter.
6.16 Copper Cable Terminations
Copper Cable Terminations must have both toe and heel screw terminations for permanent
lockdown. If a 90 degree connector is used and blocks the screw, use a clamp to permanently
terminate the connector.
6.17 Cable Trays
