Tcp/ip to eia-232

[dalmada]

Hi everyone,

Does someone knows a way of receiving a tcp conection and then send it to an hardware device via eia-232

Thanks in advance.

David

[scottmac]

That would the traditional role of the "Terminal Server."

Cisco routers can act as terminal servers.

How many ports do you need? do you have a router?

If you're just looking for one or two ports, there are some one-or-two port TS units on the market (dedicated for terminal service, about the size of a pack of cigarettes).

What do you need to do?

Scott

[dalmada]

Well,

I have a host that will open a tcp/ip connection with my router wich will then

"translate the message" to the device connected via rs232. The device can not have an ip address.

Ex: I have an aplication that only uses Tcp connections, and I want to use it

to exchange messages with my GPS device ( that only communicates via rs232).

I hope I was clear enough

Thank you

David

[scottmac]

Do a search on the Main Cisco site for "Reverse Telnet"

Basically you configure a serial port (which can be the AUX port) then telnet to the router using the routers address, followed by 200X, where X is the serial port number (as displayed with a "show Line" command). For example, if the router is 192.168.1.254, and the GPS is on line 2, the command "telnet 192.168.1.254 2002" should attach you to line two and it should operate as if you are directly connected via RS232 to the device.

To "hangup" you'd do a ctrl-shift-6 (a "ctrl^") X, then enter the command disconnect.

It's not too bad, the search on "reverse Telnet" should get you some config guides and more detailed explanations.

Good Luck

Scott

[rjathan]

Hi,

I am looking at relpacing the Xylogics based Terminal Servers with Cisco "Terminal Servers".

I have to drive dumb terminals, printers and other rs/eia-232 devices.

I am looking at 8/16/32 port Terminal Servers.

Can you give some suggesstions/options on which prioduct I can use?

or where can I find more info?

thanks in advance.

Ramesh.

[scottmac]

You can probably find C 2509s pretty cheap, or any of the routers capable of using the async interfaces (like an eight port async interface in a 2600, or a bunch of 'em in a 3660).

It's kind of dependent on the budget and the line count you need.

Do a search on async interfaces on the main site.

Good Luck

Scott