User guide

Technician’s Handbook
190
Port pinouts
The upper controller serial port supports call logging
(SMDR); the lower serial port supports and diagnostics
and maintenance functions. The ports default to
• 9600 bits/s
• 8 data bits
• no parity bit
• 1 stop bit.
Table 20: Serial port pinouts
Pin number Signal name Abbreviation
1 Data Carrier Detect DCD
2 Receive Data RXD
3 Transmit Data TXD
4 Data Terminal Ready DTR
5Ground GND
6 Data Set Ready DSR
7 Request to Send RTS
8 Clear to Send CTS
9 Ring Indication RI
3100 Hand.bk Page 190 Monday, August 19, 2002 8:49 PM