BRI

The ISDN BRI^6.1 card showed at Figure 6.3 has 4 ports (the telephony cards have 1BRI, 2BRI and 8BRI configurations too). To each port a group of 5 jumpers is associated and depending of the jumpers' configuration, the port can stay as NT^6.2 (acting as operator) or TE^6.3 (acting as PBX). For example, at Beronet cards if jumpers are connected to the two right side pins (default configuration), port is configured as TE. If jumpers are connected to the two left side pins, the port is acting as NT. It's important always to check and configure all the port jumpers. Normally the telephony cards have the TE/NT configuration schema but you can always consult the card's instruction manual.

A 8BRI card complete schema is present at http://www.ipbrick.com/files/8BRISchema.png.

Figure 6.3: BRI card

The correct port configuration (NT,TE) between all the company interfaces, is present at Figure 6.4.

Figure 6.4: Interconnection between IPBrick, PSTN e PBX

Leds

• Fixed Red: With link;
• Blinking Red: Without link;
• Fixed Green: Current call using that port.

Pinout

The correct cable pinout between PSTN, IPBbrick.GT and PBX can be seen at Figure 6.5 and Figure 6.6.

Figure 6.5: Straight RJ-45 cable pinout

Figure 6.6: Crossover RJ-45 cable pinout between IPBbrick.GT and PBX

Footnotes

... BRI^6.1

Basic Rate Interface

... NT^6.2

Network Termination

... TE^6.3

Terminal Equipment