TIM521 BRI Telephony Interface Module PIM

The TIM521 Telephony Gateway Module PIM (Figure 45) four 4 wire S/T ISDN BRI 2B+D access ports with RJ-45 jacks. Each port interfaces to the central office at the ISDN T reference point.

For BRI trunking, the TIM521 supports up to four BRI interfaces to the central office at the ISDN T reference point. Information is communicated on each port in two ways:

• Over two 64-kbps B channels, called B1 and B2, that can be circuit-switched simultaneously

  TIM521 does not support combining both B-channels together to form a 128-kbps channel.

• Over a 16-kbps channel, called the D-channel, that is used for signaling. The TIM521 occupies one time slot for all four D channels

The circuit-switched connections have an A- or Mu-law option for voice operation. The circuit-switched connections operate as 64-kbps clear channels when in the data mode.

For pinouts of cable connectors for TIM521 PIMs, see TIM521 Connector Pinout.

For information about installing and removing a PIM, see the J4350 and J6350 Services Router Getting Started Guide.

TIMs are not hot-swappable. You must power off the router before the installing or removing the Avaya VoIP modules. Ensure that the Avaya VoIP modules are installed in the router chassis before booting up the system.

TIM521 LEDs indicate link status and activity. Table 103 describes the meaning of the LEDs.

Table 103: LEDs for TIM521 PIM

For more information about the TIM521, see the Hardware Description and Reference for Avaya Communication Manager.