Airspan AS4000, Installation Manual

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Installation
31
AC Rack T1 Cabling
All cabling to the Access Concentrator connects to the interface panel. Slots 7, 8, and 9 can
be used for T1 CTU connections. Slots 10-14 are used for T1 XTU connections each slot will
support up to 8 T1 connections. (Exceptionally slots 4, 5, and 6 can be used for XTU
connections using an adapter 303-1113-900 connected to the D- type below the BNCs for the
relevant slot. Only T1 5-8 are available for T1 connections.) Slots 8 and 9 can also be used
for XTU’s but it is normal to reserve these for future CTUs if possible.
Cabling Specification
In installations Cat 5 FTP screened (foil & braid) twisted pair should be used.
a) T1 Cabling (CT Link)
From the site survey, confirm the location of the Digital Distribution Frame (DDF) if a DDF is
to be used or the CT links if the T1 feeds are fed direct to the equipment. The length of T1
feeds should not exceed 100 metres.
Run the T1 cables from the AC shelf to the allocated positions on the DDF. (8 Pairs per CTU
in normal working, up to 3 CTUs per shelf.). In partial equipped installations it may be
appropriate to run enough cables to cater for a complete rack of equipment. This reduces the
need to disturb original installation when adding additional equipment.
Feed the T1 cables through the top hole on the left hand side of rack side of the rack, and
down the channel at the side of the rack.
Identify and label each cable at both ends as well as the DDF/Backhaul positions.
Terminate all cables with RJ45 connectors at the rack and as appropriate at the DDF.
T1 RJ45 connector termination