Specifications

CHAPTER 2. Hardware of the OfficeServ 7200
2-20 © SAMSUNG Electronics Co., Ltd.
Figure 2.9 Option Boards of the UNI (Voice Subscriber)
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.
 Functions as the relay path of caller information (When caller information is entered as
8TRK, connect the RCM/RCM2, which is an option board, with the MP20 so that the caller
information can be checked in the RCM/RCM2.).
Specifications
The 8TRK has eight trunk line ports.
4SLM
4DLM