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New Member

Cellphone modem and AUX Port

Hi,

I want to connect a cellphone with an internal modem to the aux port of my router. Deriving from

http://www.cisco.com/en/US/tech/tk801/tk36/technologies_tech_note09186a0080094bbc.shtml

this should generally be possible.

However, modem autoconfigure discovery does not detect any device on the aux port, even though the modem of the cellphone could be reached via a PC com-port before. I have also tried to set the aux port manually, with the same result. I have also used a different device's aux port for comparison, with no result.

The cellphone data cable uses a standard 9-pin female connector - to connect it to the 9-pin female connector of the console cable on the aux port, I use a common gender changer.

#sh run | begin line aux 0

line aux 0

password public

login

modem InOut

modem autoconfigure discovery

transport input all

#sh line 65

[ignore the speed, this one changes constantly due to autoconfigure, of course]

Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int

* 65 AUX 38400/38400 - inout - - - 0 0 0/0 -

Line 65, Location: "", Type: ""

Length: 24 lines, Width: 80 columns

Baud rate (TX/RX) is 38400/38400, no parity, 2 stopbits, 8 databits

Status: Ready, Active, No Exit Banner, Modem Configuring,

Modem Speed Locked, Modem Signals Polled, Autoconfig Running

Capabilities: Modem Callout, Modem RI is CD, Modem Discovery

Modem state: Ready

Modem hardware state: noCTS noDSR DTR RTS

Special Chars: Escape Hold Stop Start Disconnect Activation

^^x none - - none

Timeouts: Idle EXEC Idle Session Modem Answer Session Dispatch

00:10:00 never none not set

Idle Session Disconnect Warning

never

Login-sequence User Response

00:00:30

Autoselect Initial Wait

not set

Modem type is unknown.

Session limit is not set.

Time since activation: never

Editing is enabled.

History is enabled, history size is 20.

DNS resolution in show commands is enabled

Full user help is disabled

Allowed input transports are pad telnet rlogin mop udptn v120 ssh.

Allowed output transports are pad telnet rlogin mop v120 ssh.

Preferred transport is telnet.

No output characters are padded

No special data dispatching characters

Output of "debug confmod":

Mar 1 03:40:48.927: TTY65: detection speed (115200) response ------

*Mar 1 03:40:55.055: TTY65: detection speed (57600) response ------

*Mar 1 03:41:01.183: TTY65: detection speed (38400) response ------

*Mar 1 03:41:07.311: TTY65: detection speed (19200) response ------

*Mar 1 03:41:13.439: TTY65: detection speed (9600) response ------

*Mar 1 03:41:19.567: TTY65: detection speed (2400) response ------

*Mar 1 03:41:25.695: TTY65: detection speed (1200) response ------

*Mar 1 03:41:31.823: TTY65: detection speed (300) response ------

*Mar 1 03:41:31.823: TTY65: No modem found

Any ideas about why this does not work as expected, and how to correct it?

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Cellphone modem and AUX Port

All the cisco AUX port cables that I've seen are DB25. You might find one on the web, otherwise you have to order a custom-made one or make one yourself.

6 REPLIES
Silver

Re: Cellphone modem and AUX Port

If you are using your router's console cable then that is the problem. Check this for the differences in signals and pinouts:

http://www.cisco.com/en/US/products/hw/routers/ps332/products_tech_note09186a0080094ce6.shtml#topic16

New Member

Re: Cellphone modem and AUX Port

Thank you. But that section is about DB-25 ports, while my router (which is a 2600) has a RJ45 aux port.

According to the document you point at, section 15, the pinouts for aux and console ports are identical.

http://www.cisco.com/en/US/products/hw/routers/ps332/products_tech_note09186a0080094ce6.shtml#topic15

Thus, the console cable should be usable for this setup? Or am I misreading anything here?

Silver

Re: Cellphone modem and AUX Port

This document will make things cleare:

http://www.cisco.com/en/US/products/hw/routers/ps214/products_tech_note09186a00801f5d85.shtml

Please compare the Console<--->DB25 to AUX<--->DB25. You'll see that signals go to different pins.

New Member

Re: Cellphone modem and AUX Port

I see. So what I need is a special cable that connects the Aux Port in a different way than a Console cable. Thanks so far.

Is there a pre-manufactured cable from Cisco (or someone else) for the purpose of connecting modems that use a DB-9 connector?

Silver

Re: Cellphone modem and AUX Port

All the cisco AUX port cables that I've seen are DB25. You might find one on the web, otherwise you have to order a custom-made one or make one yourself.

New Member

Re: Cellphone modem and AUX Port

Thank you.

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