Version 6.6 25 April 2012
Hardware Installation Manual 5. Cabling the Device
5.6 Connecting to ISDN BRI Lines
The procedure below describes how to connect to BRI lines.
Warning:
To protect against electrical shock and fire, use a 26 AWG min wire to
connect the BRI ports to the PSTN.
Note: This section is applicable only if your device is installed with a BRI module.
A BRI port can be configured either as TE (Termination Equipment/user side) or NT
(Network Termination/network side). The connector pinouts vary according to the
configuration, as shown below:
Figure 5-6: RJ-45 Connector Pinouts for BRI
When configured as NT, the BRI port drives a nominal voltage of 38 V with limited current
supply of up to 100 mA.
To connect to BRI lines:
1. Connect the BRI cable to the device's BRI RJ-45 port.
2. Connect the other end of the cable to your ISDN telephone or PBX/PSTN switch.
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