Figure 2.9 Option Boards Of The Uni (Voice Subscriber) - Samsung OfficeServ 7200 System Description

If 4SLM and 4DLM are mounted, UNI operates as a voice subscriber board.
Description of 4TRM/8TRK
4TRM supports only DTMF dialing, but does not support for Dial Pulse dialing.
8TRK supports DTMF and Dial Pulse dialing.
2.3.2.3 8TRK
The 8TRK (Trunk) provides 8 ports for analog trunk lines. One board has the PRS, MPD,
or CID path. Also, the board sends voice through the trunk lines and transmits voice data of
64 Kbps to one channel.
Major Functions
The 8TRK performs the functions below:

Detects ring connection.

Detects on/off-hook.

Sends dial pulse.

Performs Polarity Reverse Sensing (PRS) (Option)

Performs Metering Pulse Detection (MPD), (Option)

Performs the CID function.

Periodically checks if the line is connected. If so, the voice data can be transmitted.
This function is called line monitoring.

A caller information relay function (a path to verify the caller information from the
RCM2 can be created, if the caller information is provided through the 8TRK, by
connecting the RCM2 to the MP20)
© SAMSUNG Electronics Co., Ltd.
4SLM

Figure 2.9 Option Boards of the UNI (Voice Subscriber)

OfficeServ 7200 System Description
4DLM
2-19