UC540: Can we limit FX0 call duration?

[JOSEPH GALEA]

                  Maybe due to carrier, some of our FX0 calls don't disconnect (the situation occurs most when call originates from outside and outside hangs up first; especially more likely when the outside caller was on hold or in conference and then hangs up). Anyway tried lots of stuff - looks like the carrier Cablevision/Lightpath doesn't always forward supervisory disconnect.

We wanted to limit call times. We never go over; for example, 5 hours.  So if we limit call times to 5 hours then at least the FX0 lines would clear over night.

Is there a command to limit FX0 call time? Both directions is fine as long as we eventually get a disconnect.

Thanks,

Joe Galea

[Leo Salcie Tejeda]

Hi,

There's not such feature in CME. You will need a tcl script to disconnect The call. I recommend you this link: http://ciscoscripts.com


Sent from Cisco Technical Support Android App

[paolo bevilacqua]

Thank you Leo for recommending my work. However in a case like OP is described, it is enough to configure tone-based disconnect supervision to avoid stuck lines.

[JOSEPH GALEA]

Paolo,

Even though the system does not hang up, yes, the FX0 we eventually get a rapid beep - the rapid beep just continues and continues.   I thought that the helpline tried to disconnect based on the rapid beep tone but our rapid beep had 4 peaks not two peaks.  The helpline was able to get a disconnect based on the beeps found over seas (two peaks) but not from our carrier (four peaks).  

I can't seem to attach the associated file that can be played using the Audacity application. The Audacity application shows 4 peaks.

Can you use tone-based disconnect supervision if the rapid beep has 4 peaks?

Joe

[paolo bevilacqua]

Yes, tone-based disconnect supervision can be used with any pattern, as it is fully configurable.

[JOSEPH GALEA]

Paolo,

Capturing the audio and using the Audacity application, the helpline and I believed that the repeating 4 frequencies are 1400, 2060, 2453 and 2600 Hz, it’s an information to the user that phone’s handset is left off hook.

I received this from the helpline:

"We tried to configure and use this tone as disconnect tone in order to make call disconnection, however because it is consisted of 4 different frequencies, it’s not being possible to configure that. If that tone would have only 2 frequencies, we would be able to prepare disconnect tone for it."

I very much appreciate the helpline but does this particular response from the helpline make sense? [Actually, the repeating 4 frequency peaks may be 1400, 2060, 2450 and 2600.]

Thanks again,

Joe

[paolo bevilacqua]

That is called howler tone. You can try configuring the two prevalent frequencies, but I'm not sure there is any.

[nirmalissac]

I hope this document will help you.

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800ae2d1.shtml#topic11

[JOSEPH GALEA]

Nirmal,

Do you know the CLI Commands in our case?  After about 40seconds of silence we get the North American Off-Hook Tone which is 1400,2060,2450, 2600; cadence .01sec on, .01sec off.  There is about 40 to 50 secounds of silience on that particular line before the tone starts.

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Thank you,

Joe