Lucent Technologies PortMaster PM-2, Hardware Installation Manual

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RS-232 Cable
B-10 Communications Server Hardware Installation Guide
RS-232 Cable
Table B-5 gives pinout information for a 25-pin RS-232 cable with two DB-25
connectors. Pins not listed have no connection.
Note – RS-232 only supports signaling at speeds up to 56Kbps. If the connected device
supports RS-423 signaling, use an RS-423 cable to obtain speeds up to 128Kbps.
This cable is not supplied, but can be ordered from Lucent. Specify product code MC-6.
Table B-5 RS-232 Cable with DB-25 Connectors
Pin Name Definition Direction
2 TXD Transmit Data Output
3 RXD Receive Data Input
4 RTS Request to Send Output
5 CTS Clear to Send Input
6 DSR Data Set Ready Input
7 SGND Signal Ground
8 DCD Data Carrier Detect Input
15 ST Send Timing Input
17 RT Receive Timing Input
20 DTR Data Terminal Ready Output
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