User's Manual

30 UltraWAVE BTS Installation and Commissioning Guide, Release 6.5A
Figure 2-11 illustrates the pinout for the RJ-48C to DSUB 120 Ohm conversion cable.
2-5.2 T1 Cables
T1-100 Ohm
For T1 connections, the proper cable is individually shielded twisted pair with a nominal impedance of
100 Ohm +/-5% at 772 kHz. The maximum allowable cable distance depends directly on the insertion
loss of the cable at 772 kHz. The T1 card can accommodate up to 9 dB of cable loss. When using
22 AWG ABAM cable, 9 dB of loss is approximately 2000 feet. When using Belden type 9729 (with a
cable loss of 6 dB per 1000 feet at 772 kHz) the maximum cable distance is approximately 1500 feet.
Table 2-9 provides a description of cables required for installation and connection to a T1 network, but
not supplied with the BTS:
Figure 2-11 120 Ohm DSUB Conversion Cable
Before connecting T1 lines to the BTS, it is assumed that the quality of
the lines has been verified. It is recommended that bit error rate tests
be completed to ensure that the BER is less than 10
-8
.
Table 2-9 Customer-Supplied T1 Cabling
Cable Identity Cable Type Corresponding Cable Plug
T1, 100 Ohm Shielded, Twisted, 2-Pair RJ-48C, Male
Note: The number of cables required depends on the ordered configuration of the BTS.
3
11
1
9
IW009303
8
ORANGE/WHITE
BLUE/WHITE
WHITE/ORANGE
WHITE/BLUE (R-TIP)
(R-RING)
(T-TIP)
(T-RING)
1
2
3
5
6
7
4
J2
J1
Pin 9
J1
J2
Pin 1
Pin 15 Pin 8
Pin 1
Pin 8