Signal strength indicators
Digi TransPort User Guide 80
RS-232 (V.24) serial cable wiring
The tables below detail the wiring required for the various types of serial cable that you may
need.
Note Some products are able to operate both synchronously and asynchronously. When these
products are operating asynchronously, it is strongly recommended that the clock pins
(TxC, RxC and ETC) are left disconnected.
25-Pin to 25-Pin straight through cable
This cable is normally used to connect a V.24 synchronous terminal to a Digi router.
Note Frame Ground is optional
DB 25-Digi Side DB 25
Signal Pin # (DCE) Pin # (DTE) Signal
Frame Ground (Case) Shield Shield Frame Ground (Case)
TxD 22TxD
RxD 33RxD
RTS 44RTS
CTS 55CTS
DSR 66DSR
GND 77GND
DCD 88DCD
RxC 1717RxC
DTR 2020DTR
ETC 2424ETC
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