Figure 2.9 2Brm Board Appearance - Samsung OfficeServ 7070 System Description

2.3.2.3 2BRM
The 2BRM (BRI ISDN module) board provides two 2B+1D digital trunk ports. This
module is connected to 4 channel ISDN trunk in S0 and T0 interface. In S0 interface do not
support DC power feeding mode.
Key Functions
The 2BRM digital trunk board provides the following functions:

Full duplex 2B+1D S/T interface transceiver based on Consultative Committee on
International Telegraphy and Telephony (CCITT) I.430

Frame conversion between S/T interface and ISDN Oriented Modular(IOM)

Receive timing recovery according to a specific operation mode

D-channel access

Activation and deactivation procedures (automatic wake-up in power-down state)
Specification
The 2BRM digital trunk board provides four B channel and two D channel.
Appearance

The 2BRM board can be mounted as a daughter board on the BMP (B8S part) or E8S
board.

Maximum 3 boards can be mounted in a system.

There is no separate line connection part within the 2BRM board. It is connected to an
external line through the RJ45 connector on the line connection part, located at the
right side of the system.

Switch on of S1 provided a termination 100 ohm for S0 interface.
© SAMSUNG Electronics Co., Ltd.
OfficeServ 7070 System Description/Ed.02OfficeServ 7070 System Description/Ed.02

Figure 2.9 2BRM Board appearance

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