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DHS- L Instal lation
SMDR/SMDA Output Device
The output device or the Station Message Detail Recording (SMDR) must meet the
requirements and match the RS232C pin-out described below.
The SMDR port baud rate is programmable from 110 to 19,200 BPS.
The Data Format is: 8 data bits, 1 stop bit, No parity bit.
Connection of the SMDR serial port to a computer for call accounting is often
relatively simple, since a straight-through cable will typically mate the devices.
The SMDR serial port output is one way to the printer or other call accounting device.
KSU Connection
To connect an output device to the KSU:
1. Match the baud rates on the output device and the system.
2. Turn ON the AC power to both the device and the system before connecting the
RS232C cable to Port-2 on the KSU. This prevents any electrical surges from being
transmitted by the interface.
3. Carefully connect the RS232C DB-9 male end of the interface cable from the device to
the SMDR RS232C DB-9 female connector located at the bottom edge of the MPB.
The KSU end is considered DCE and printer or call accounting device is DTE.
The RS232C cable connecting the SMDR device to the KSU must not exceed 50 ft. in length.
DCE
Male DB-9
K
S
U
Figure 2-26: RS-232C DB-9 Connector
Consult your peripheral device documentation for additional information.
Chapter 2 - Description a nd Installation
Designation
1
DCD
2
RX
3
TX
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
2-45
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