CHAPTER 2.
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© SAMSUNG Electronics Co., Ltd.
2.3.1 Control Boards
This section describes the configuration and functions of the MP20 and MP20S, which are
the main control boards that control all the functions of the OfficeServ 7200, and those of
the LCP, which is the minor control board.
2.3.1.1 MP20
The MP20 is the main control board that controls all the functions of the OfficeServ 7200
and is mounted on slot 0 of the basic cabinet. The MP20 performs voice switching,
processes signals, and manages the subscriber terminals.
Major Functions
The MP20 performs the functions below:
Operates applications through the LAN interface.
Easy Installation using the SD card.
Back ups the databases.
Provides ports for the Universal Asynchronous Receiver and Transmitter (UART) test.
Holds a meeting, detects caller IDs and multi-frequency and controls door phones.
Functions as the internal/external MOH or loud/common bell.
Sets the time and shows table time.
Functions as the Analog Phase Locked Loop (APLL) for the synchronization of the
digital subscribers.
Option Board
There are RCM2, MIS, CRM, IRM and Modem as option boards mounted in the MP20.
The functions of these option boards are as follows:
R2 CID Module 2 (RCM2): RCM2 detects an office line CID or transmits the CID
information to the extension telephone as the ASIC chips, which detect the CID. In
addition, RCM2 creates the R2 signal, the signaling signal between offices through the
composed option board. The location that the RCM2 is mounted in the MP20 is
provided and displayed on the MP20. If the RCM2 board is mounted, it is available to
create the R2 signal through the 30 channels, and detect the R2 signal of 8 channels or
office/extension CID of 14 channels. Selecting a detected signal (R2/CID) is decided
by the switch location of the RCM2. The Simultaneous R2 CID Support function
supports the 4 R2 channels and 6 office/extension CID channels at the same time (Over
V2.45)
Miscellaneous (MIS): MIS is the option board mounted in the MP20. The location is
provided and displayed on the MP20. MIS provides 2 external holding voice source
ports, an external paging port, a loud bell port, a common bell port, and also provides 2
dry contact ports that connect or disconnects the signal transmission or power supply
with external equipments.