Section 9, ATT-TP-76400 DETAIL ENGINEERING REQUIREMENTS
AT&T January, 2012
length limitation tables from a DSX1 or DCS panel apply to switch elements as well as
network elements.
A. Length limitation from DSX1 panel to switch element or network element using wire wrap
technology:
1.) 26 gauge 407.5 feet (This gauge cable shall be the FIRST CHOICE until the
length limitation is exceeded)
2.) 22 gauge 612.5 feet (This gauge cable shall be the SECOND CHOICE after 26
gauge except for cross-aisle applications or when the 26 gauge length limitations
are exceeded)
3.) 24 gauge 507.5 feet (This gauge cable is NOT NORMALLY USED as LBO
range settings are typically listed for 26 gauge and 22 gauge cables)
B. Length limitation from DCS to switch element or network element using wire wrap
technology:
1.) 26 gauge 900 feet (This gauge cable shall be the FIRST CHOICE until the
length limitation is exceeded)
2.) 22 gauge 1310 feet (This gauge cable shall be the SECOND CHOICE after 26
gauge except for cross-aisle applications or when the 26 gauge length limitations
are exceeded)
3.) 24 gauge 1100 feet (This gauge cable is NOT NORMALLY USED as LBO
range settings are typically listed for 26 gauge and 22 gauge cables)
C. When hardwired DS1 Cable length runs are in excess of the transmission range of 26
gauge cables, use 22 or 24 gauge cable.
The above stated Length limitations from DSX-1 panel or DCS to a switch element
or to a network element may be adjusted downward/reduced in length to allow for
longer DSX-1 Y2, 24 gauge Cross-Connect Lengths, in excess of the stated 85 foot
limitation.
5.5.11 Transmit and receive signals shall be in separate cables from the transport equipment to the
DSX1 except as manufacturer requirements dictate
5.6 DSX-3 Considerations
5.6.1 All hardwired cables between the connecting equipment and the DSX-3 shall be 75 ohm
coaxial cable with a single tinned copper shielded braid. When hardwired cable length runs
are in excess of the transmission range of 735C coaxial cable, use 734C coaxial cable. Use
of 734C coaxial cable is required in IXC offices unless written approval for use of 735C coaxial
cable is obtained from AT&T Standards. Note: 734C is the thicker, longer range, coaxial
cable and 735C is the thinner, shorter range, coaxial cable.
NOTE: AT&T will not require the Switch Manufacturers (Alcatel-Lucent, Nortel, Siemens and
Ericsson), to use 734C/735C cable in place of 734D/735A cable on Switch jobs. However, the
Switch Supplier’s coaxial cable stripping tools and coaxial connector crimping tools must meet
9-10
(652 strony)
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