DETAIL ENGINEERING REQUIREMENTS Section 9, ATT-TP-76400
AT&T January, 2012
5.4.4 New Cross-Aisle Bridges shall be a preferred alternative to Cross-Aisle Tie Pair Panels.
5.5 DSX-1 Cross-Connect Rules
5.5.1 In order to maintain complete flexibility, planning of the office size is of primary importance
and determines the ultimate size and layout of the DSX1and should be made according to
the following guidelines:
A.) Minimize the amount of multiple jumpers.
B.) Use both the bottom and top horizontal troughs for jumpers that will traverse over two
panels distance.
C.) Each Carrier Communications Space shall maintain the consistent standard at which
point the jumpers are reversed to connect two T1s.
D.) Larger troughs shall be purchased and installed when the jumper depth reaches the top
of the trough panel at any point in the lineup.
E.) Work all disconnects and remove all jumpers and inter-bay cross-aisle panels and erase
the circuit identification on the faceplate of the panels.
F.) Provide slack on the horizontal trough of each panel not to exceed 4 inches nor be less
than 2 inches.
5.5.2 To alleviate cable congestion in the relay rack duct, a minimum of 5 inches of space shall be
provided between each 56 port/panel-bay
5.5.3 To alleviate cable congestion in the relay rack duct, a minimum of 5 inches of space shall be
provided between each 84 port/panel-bay.
5.5.4 It is recommended, when troughs are bay supported, to either install a skeleton bay (subject
to future availability) to pre-equip the required horizontal troughs or to place a complete set of
troughs when each new bay is installed in a lineup. Additional bays in a DSX1 lineup may
result in possible cable congestion in the overhead racks.
5.5.5 DSX-1 panels shall be located in 7 foot bays for new deployments. Existing line ups with
embedded DSX-1 panels placed above the 7 foot level may be completed to the end of the
line up, but all new line ups shall have new deployment of DSX-1 panels located only in 7 foot
bays.
5.5.6 Any tie cable panels should be mounted at the top of the DSX-1 bay at the 6-7 foot level.
5.5.7 For new DSX-1 lineups in central offices, bantam type jack panels shall be provided.
5.5.8 All DSX patch panels shall be physically and electrically compatible in the same DSX1 lineup.
5.5.9 An upper and lower express trough shall be provided for each bay.
5.5.10 All hardwired cables between the connecting equipment and the DSX1 (DCS panel) shall be
sized according to length as follows. The 22, 24 and 26 gauge cables may be wire wrapped
at the switch or network element end; or may be connectorized at the factory. The following
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