User's Manual

Table Of Contents
UltraWAVE Micro BTS Installation and Commissioning Guide, Version B 51
Connecting E1 or T1 Trunk Cables
Using Cross-Over RJ-48C Cables
When connecting a shielded twisted pair crossover cable between two UltraWAVE
or WAVEXpress systems, the routing of the pins needs to comply with the cable
mapping shown in Figure 2-20. The RJ-48C cable connector may be of the
conventional plastic body type with the shield and drain wires of the cable
connected to a pigtail to pin 8 (Signal Ground), which is internally grounded to the
card. However, a shielded cable plug may also be used, terminating the cable
shield to an integral metal shell of the RJ-48 jack which then makes an electrical
connection to the front panel when installed. Figure 2-20 provides the pin
assignments for the RJ-48C jacks.
To connect two systems using RJ-48C cables, connect a crossover cable (see
Figure 2-20) from port 1 of the first chassis to port 0 of the second chassis.
Figure 2-20: Cable Mapping of RJ-48C Crossover Cable
1
2
3
4
5
6
8
7
1
2
3
4
5
6
8
7
Pin 2: Receive Tip
Pin 5: Transmit Tip
Pin 1: Receive Ring
Pin 4: Transmit Ring
Pin 1: Receive Ring
Pin 2: Receive Tip
IW140401
Pin Numbers
PCB Signal
Ground
T1 or E1 Port
Connector
Pin 4: Transmit Ring
Pin 5: Transmit Tip
T1 or E1 Port
Connector