Karel DS200, Техническое справочное и монтажное руководство

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DS Series PBX Technical Reference And Installation Guide
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V.3. DS200L
V.3.A. THE PCU200 BLOCK
V.3.A.1. GENERAL INFORMATION
PCU200 is a processor structure that has been based on a 19” PC, which controls all
functions of the exchange.
The PC that functions as the PCU200 is 19” in width, 2U in height and 80 cm in depth. It is
placed in a 19” cabinet.
The master software of the exchange runs under the Linux Suse 11.0 on the PCU200
computer. The minimum requirements of a DS200L PCU block:
•
Pentium IV 2.4 GHz. processor
•
60 GB hard disc
•
1 GB RAM
The master software runs under LINUX in real time and performs its functions by means of a
file system. Using this file system, the entire exchange parameters, statistical data, call
records, alarm information, etc. are stored in separate files on hard disc.
Figure shows the PCU200 and the redundant PCU200 in a 19” cabinet.
V.3.A.2. COMMUNICATION
PCU200 communicates with the other units within the exchange over the TCP/IP protocol.
PCU200 is the unit that initiates intra-exchange communication.
PCU200 controls all the communications between all the exchange units. The
communication information, namely IP addresses and TCP ports of the DCC and TW200
units are entered in a table in the PCU200.
Thanks to that structure, both of the blocks that carry out TDM and IP switching can be
controlled by the same center. Besides, PCU200, which provides communication through the
ethernet structure, has completely been isolated from exterior factors. That fact is extremely
essential considering that the system security is thus increased.