User's Manual

Installation 31
2-5.3 Connecting E1 or T1 Lines
All E1 or T1 cable routing should be installed per the site survey documentation in conjunction with the
information identified in the interWAVE Network Implementation Manual
.
• Using the appropriate customer-supplied cables, connect the Abis interface E1 and/or T1
cables to the local E1 or T1 provider.
2-5.4 Direct Cabling Between Multiple UltraWAVE or WAVEXpress Systems
This section provides information for cabling between WAVEXpress equipment. The external cabling
between your equipment will vary depending on the configuration of the cable management assembly
of each chassis. This could consist of any combination of BNC, DSUB or RJ-48C connectors and either
E1 or T1 signaling.
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 2-12. 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 2-12 provides the pin assignments for the RJ-48C jacks.
The direct cabling between systems requires crossover cables (Tx to Rx,
and Rx to Tx), instead of the straight-through cabling used when
connecting systems through a radio or telephone provider network.
Figure 2-12 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
IW214901
Pin Numbers
PCB Signal
Ground
T1 or E1 Port
Connector
Pin 4: Transmit Ring
Pin 5: Transmit Tip
T1 or E1 Port
Connector