Specifications

OfficeServ 7200 System Description

2.3.2.6 4BRI

The 4BRI (Basic Rate Interface) provides the digital trunk line. A 4BRI provides 2B + D

ISDN BRI and functions as the Q-SIG. This board transmits voice via the trunk line and a

channel transmits the voice data of 64 Kbps. The 4BRI is not available for MP20S.

Major Functions

The 4BRI performs the functions below:

 Processes the T/S0 mode signals by programming.

 Uses 4port T mode or selectively uses 4port S0

 Resistor Terminations for S0 line (100 W).

 Endures the ITU-recommended level of surge.

 Protects the output port by monitoring line signals.

 Crystal-less wander and jitter attenuation/compensation to TR62411.

Specifications

The specifications of the 4BRI are as follows:

 Four trunk line port

 T: 8 channels

 S: 8 channels

Front View of 4BRI

The front view of the 4BRI is shown in the figure below:

Figure 2.14 Front View of the 4BRI

The components on the front panel of the 4BRI have the functions below:

4BRI

P1-T

RUN

P2-T P3-T P4-T

P1-S P2-S P3-S P4-S

ACT