Karel MS48, Инструкция по установке и обслуживанию

Страница: 20 / 70

Karel MS48 Installation & Maintenance Guide
Edition 3.2
17
II.3. CALL RECORD LISTING INTERFACE – CM48
MS48 system offers the alternative of using a PC for Call Record Listing (CRL)
facilities, so that you can process the records of the external calls stored in the
system memory over PC.
CM48 Call Record Listing Interface serves this purpose. By way of CM48, call
records can be processed, filtered and statistically ordered or a phone directory
can be created. CM48 consists of the add-on card called PKCR, a 5-meter cable
for PC-PKCR connection, a security plug and a 3.5” diskette with the necessary
software that operates under Windows. The cable has a 25-pin D-type plug at the
PC end and a 5-pin connector at the PKCR end.
•
PC R
EQUIREMENTS
:
The PC to be used with MS48 should have the following specifications:
a) 640 KB RAM (at least)
b) Windows (not older than 3.1)
c) A harddisk
d) A serial port
•
S
IGNALING AND COMMUNICATION
P
ARAMETERS
:
The signaling between PKCR card and the PC is illustrated in the following
table. Since the PC-PKCR cable has a 25-pin plug at the PC end, it is
necessary to employ a 25-pin to 9-pin converter plug, in order to use the 9-pin
connector of the PC:
PKCR Card PC
Connector Pin No Signal 25-pin Connector
Pin No
9-pin Connector
Pin No
1 + 10 VDC 4 7
2 - 10 VDC 20 4
3 TXD 3 2
4 RXD 2 3
5 PC GND 7 5
The signal names above are given with respect to CM48 and these pin
assignments are valid only for IBM compatible devices. If your device is not
IBM compatible, then you must provide the requested pin connections to
match the signaling parameters of CM48.
The communication protocol for PC-Exchange connection is illustrated in the
following table.
For PC
Data Bits 8
Stop Bit 1
Parity None
Baud Rate
4800 Bps
CM48 is able to set the communication protocol to the appropriate values
automatically.