AudioCodes Mediant 500L - ISDN BRI Interfaces; Connecting BRI Lines; Figure 5-3: RJ-45 Connector Pinouts for te or NT BRI Ports

Media Gateway & E-SBC 25 Mediant 500L
Hardware Installation Manual 5. Cabling the Device
5.2 ISDN BRI Interfaces
This section describes how to connect the device to ISDN BRI lines.
5.2.1 Connecting BRI Lines
The BRI ports can be connected to ISDN terminal equipment such as ISDN telephones or
PBXs. Each BRI port can be configured either as termination equipment/user side (TE) or
network termination/network side (NT). Up to eight terminal equipment (TE) devices can be
connected per BRI S/T port, using an ISDN S-bus providing eight ISDN ports. When
configured as NT, the BRI port drives a nominal voltage of 38V with limited current supply
of up to 100 mA.
Warning: To protect against electrical shock and fire, use a 26 AWG min wire to connect
the BRI ports to the PSTN.
Note: BRI interface is a customer-ordered item which is supported only on specific
hardware configurations.
For more information, contact your AudioCodes sales
representative.
The BRI cabling specifications include the following:

Cable: Straight-through, Category (Cat) 5, 5e or 6 cable

Connector: Standard RJ-45

Connector Pinouts:
Figure 5-3: RJ-45 Connector Pinouts for TE or NT BRI Ports