Therefore, if you are using a DB25Ĭonnector, Pin 2 (TX) which is an output signal on a DTE (the PC) is linked to Pin 2 on the DCE the modem (where Quite simply, a "straight through" cable, linking pin 1 on the DTEĬonnector to pin 1 on the DCE connector (etc.) is all that is required. The RS/232 specification is designed for.
#Cisco Serial Dcd Dsr Dtr Rts Cts Pc
a PC to a modem) couldn't be any simpler. or more precisely, DTE to DCE connections.Ĭonnecting a DTE to a DCE (e.g. Pins in RJ45 plugs and sockets are numbered as shown in the diagram:- Connector Pinouts Function Unfortunately, this time you've got to learn them (or remember the URL for this page !) as they are Is that there are enough bits to allow you to connect anything (PC, terminal or modem) to the console orĪuxilliary port of your Cisco device by just picking out the correct connectors. This consists of an RJ45 "rollover"Ĭable in a fetching shade of blue (it used to be black) and a selection of RJ45 to DB9 and DB25 adapters. More-or-less any Cisco device you buy now comes with a standard "console kit". Once again, the pin numbers are usually visible (if you squint !) on the connector casing:- Cisco RJ45 Connector In the top left corner of the "male" connector and the top right corner of the "female" connector.
The pin numbering scheme is identical to that used for the 25 pin connector (see above). Numbers discreetly printed on them like the connector shown below:- 9 pin connector Identifying the Pins Happily, you don't need to actually remember this in any great detail. Left corner, while looking at a female connector pin 1 is in the top right corner. This means that looking at a male connector, pin 1 is in the top Numbering convention is chosen so that pin 1 on the "male" connector will connect to pin 1 and the "female"Ĭonnector, and so on for all pins. The first thing to know is how the pins in the connectors are numbers. RS/232 Pinouts & Cables RS/232 Pinouts & Cables 25 pin connector Identifying the Pins
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