Figure 2.14 Front View Of The 4Bri - Samsung OfficeServ 7200 System Description

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2.3.2.7 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 4 port T mode or selectively uses 4 port S0
Resistor Terminations for S0 line (100 ).


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:
The components on the front panel of the 4BRI have the functions below:
2-24
P1-T P2-T P3-T
P1-S P2-S P3-S

Figure 2.14 Front View of the 4BRI

P4-T
P4-S
RUN
ACT
4BRI
© SAMSUNG Electronics Co., Ltd.