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New Member

FXO disconnection

Is there any way to find which signals are coming from PSTN(Telco)side? I have a FXO disconnection problem and almost tried every thing. Please help.

Regards,

MAR

18 REPLIES
Hall of Fame Super Gold

Re: FXO disconnection

Which country are you in?

Check the info from the great guys at:

http://www.3amsystems.com/wireline/tone-search.htm

Hope this helps, please rate post if it does!

New Member

Re: FXO disconnection

Yes, i've checked and i make a new custom tone but it didn't resolved my problem. Please advice.

Hall of Fame Super Gold

Re: FXO disconnection

Record your tone on the PC, attach it here together with config and mentioen the applicable country.

New Member

Re: FXO disconnection

Please find the attached tone & config file. Country = Pakistan. Also find the debug file.

Regards,

MAR

Hall of Fame Super Gold

Re: FXO disconnection

Hi, recording quality is marginal, but try 440 Hz, 275 ms on 275 ms off.

New Member

Re: FXO disconnection

Is voice port configuration is alright ?

Hall of Fame Super Gold

Re: FXO disconnection

Seems so.

New Member

Re: FXO disconnection

I've checked but it didn't work. Please find the attached "debug vpm all" file. I'll be waiting for your useful suggestion.

Thanks

Hall of Fame Super Gold

Re: FXO disconnection

Tone-based disconnect supervision is not very reliable and sometime doesn't work at all.

However in the debug seems like you're getting battery reversal, try that:

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800ae2d1.shtml#topic6

Good luck!

New Member

Re: FXO disconnection

I've tried but no luck. Is there any way to find out which type of signals PSTN are sending.

Regards,

MAR

Hall of Fame Super Gold

Re: FXO disconnection

It's probably 425 Hz after all. The recording you sent has a lot of noise and the frequency analysis can be impacted. The main problem is that tone-based is unreliable in itself.

New Member

Re: FXO disconnection

Is there any way to find out which type of signals PSTN are sending ?

Hall of Fame Super Gold

Re: FXO disconnection

They are sending the signals detailed above, problems is rotuter doesn't recognize them. Which exact IOS are you using ?

New Member

Re: FXO disconnection

Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 12.4(3h), RELEASE SOFTWARE (fc2)

c2800nm-adventerprisek9-mz.124-3h.bin

Hall of Fame Super Gold

Re: FXO disconnection

That "might" be CSCek27376. Do you use "connection plar XXX" or "connection plar opx XXX", and can you switch to the second if using the first ?

New Member

Re: FXO disconnection

I've checked but no output. So anyway thanks. You did'nt tell me how to check the PSTN signals?

Hall of Fame Super Gold

Re: FXO disconnection

No output for what ? We've checked the PSTN signals already.

New Member

Re: FXO disconnection

What i meant to say is that i've checked but it's not working.

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