User's Manual

Table Of Contents
Installation 29
Conversion Cables
If you are connecting into an existing E1 network with standard BNC or DSUP connectors, a conversion
cable for either the 75 Ohm or 120 Ohm will be required. To purchase these cables from interWAVE,
contact your local sales support representative.
Figure 2-10 illustrates the pinout for an RJ-48C to 75 Ohm BNC conversion cable.
Before connecting E1 lines to the BTS, it is assumed that the quality of
the lines has been verified. It is recommended that bit error ratio tests
be completed to ensure that the BER is less than 10
-8
.
Table 2-8 Customer-Supplied E1 Cabling
Cable Identity Cable Type Corresponding Cable Plug
E1, 120 Ohm Shielded, Twisted, 2-Pair RJ-48C, Male
E1, 75 Ohm Shielded, Twisted, 2-Pair RJ-48C, Male
Note: The number of cables required depends on the ordered configuration of the BTS.
Figure 2-10 75 Ohm BNC Conversion Cable
IW009302
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
J3
J1
J2
J3
RECEIVE
TRANSMIT
Pin 1
Pin 8
J1