[c-nsp] can not configure modem by router

Juergen Marenda cnsp at marenda.net
Sat Nov 17 09:34:44 EST 2012


On Sat, Nov 17, 2012 at 02:22:58PM +0330, s m wrote:
> hello guys
> 
> i wanna connect a modem to a 2800 router by AUX port. this is my
> configuration:
> modem InOut
> modem autoconfigure discovery
> transport input all
> stopbits 1
> speed 38400
> flowcontrol hardware
> 
> the speed value changes because "mode autoconfigure discovery" is set.
> 
> i used blue console cable RJ45 to DB9 for connecting AUX port to modem.

use the black cable or the supplied 9-to-25 CON-MODEM-adapter.
the light-blue cable is to connect to a PC-AT Serial Port.

Or crimp an RJ45 Plug reverse on the router's end of the cable .

Or use a NULLmodemcable beetween Modem and DB9 "con" .

You should be able to telnet ip-of-your-router 2001 ,
authenticate at router, and then speak with the modem.

If you connect PC with Hyperterm instead of the modem,
and this works, then it will not work with the modem,
and you need to get/build a fitting cable, see above.


[...]
> i read when the connection is correct, modem hardware stats should be CTS
>  not noCTS. moreover i can not do reverse telnet to modem.

YOur cabling is wrong, both sides SEND and RECIVE Lines are connected together
(RS232 i must be shorit-ciruit proof, +-12 V...)
> 
> please let me know how i should fix it and configure my modem by  AT
> commands.

Hope this helps,

Juergen.



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