
ET100 LAN-WAN Bridge
13
WAN Port Pin Assignment
The following tables give the pin, circuit, function and signal
direction as seen on the ET100's DB25M connector for each of the
selectable interfaces. RS-232 and RS-530 connections may be
made directly. Adapter cables are required to match the physical
connectors for V.35 (MB34), X.21 (DB15) and RS-449 (DB37).
a. V.24/RS-232 INTERFACE PIN ASSIGNMENT
PIN CIRCUIT FUNCTION DIRECTION EIA
1 FGND Protective GND AA
2 TD Transmit data OUT BA
3 RD Receive data IN BB
4 RTS Request to send OUT CA
5 CTS Clear to send IN CB
6 DSR Data set ready IN CC
7 GND Signal ground AB
8 DCD Carrier detect IN CF
15 TC Transmit clock IN DB
17 RC Receive clock IN DD
20 DTR Data term ready OUT CD
24 XTC DTE xmit clock OUT DA
Table 7: RS-232 Interface Pin Assignment
SW2-1/2-2 ON/ON
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