CUE and FXO disconnect Problem

Answered Question
Oct 13th, 2009
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I have problem with FXO ports located in CME 7. the call remains active till the disconnect signal comes from the CME or CUE


I tried the following:


I am calling from PSTN to IP Phones: if the user answers the call and then I terminate the call. Call will disconnect. if the user does not take the call then the call will be forwarded to the CUE voice mail. once it is forwarded I terminated the call from PSTN. but the call in this case still active and a silent message will be stored in the voice mail.


I think it is not normal FXO disconnect problem because it does not happen between the CME and PSTN. it is between CUE and PSTN. so any help??

Correct Answer by paolo bevilacqua about 7 years 6 months ago

In the sound software, you look at the time interval for tone and silence.

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paolo bevilacqua Tue, 10/13/2009 - 04:17
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It is indeed a disconnect problem of the most classic type.


Remember, either use ISDN where the problem never happens, or must configure accurately disconnect supervision, and live with an inferior system.

JustForVoice_2 Tue, 10/13/2009 - 06:29
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Thank you for your reply. but I tried all disconnect supervision types but no luck

paolo bevilacqua Tue, 10/13/2009 - 06:32
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You need to configure the tones explicitly for your country.


And, some IOS versions have bugs that prevent it from working.

JustForVoice_2 Tue, 10/13/2009 - 07:20
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I am using 2851 IOS version:12.4(24)T


I searched bug toolkit and I found the following bug:


CSCsx42760 Bug Details:


Need attention tone detector for supervisory disconnect

Symptom:

Inability to disconnect on the US 'offhook alert' or 'attention tone'. This tone is used to alert a user that the phone is offhook, after the phone has been offhook for an extended period of time after the other party has hung up.



Conditions:

The tone is made up of 1400 Hz, 2060 Hz, 2450 Hz, and 2600 Hz. This tone is sometimes found as a disconnect tone in areas that do not have any other supervisory disconnect method, and is the only form of disconnect notification.


This bug is to introduce CLI to offer an ability to disconnect on this tone.


Workaround:

None.

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsx42760&from=summary


but I am not in US


Inability to disconnect on the US 'offhook alert'


Do you think this is the problem???

paolo bevilacqua Tue, 10/13/2009 - 07:28
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No, the problem is that you need to configure the tones for your specific country and pstn.

JustForVoice_2 Tue, 10/13/2009 - 07:39
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I already have configured them


this is the configuration:


voice-port 0/3/0

supervisory disconnect dualtone mid-call

supervisory custom-cptone STC

no battery-reversal

input gain 14

output attenuation -6

cptone SA

timeouts call-disconnect 5

timeouts ringing 5

timeouts wait-release 5

timing hookflash-out 50

connection plar 5003

caller-id enable


paolo bevilacqua Tue, 10/13/2009 - 07:47
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I do not see the custom-cptone configuration.

JustForVoice_2 Sat, 10/17/2009 - 03:36
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I already have added the voice class but still the same problem.


any suggestion??


paolo bevilacqua Sat, 10/17/2009 - 03:53
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Wrong tones, or buggy IOS.

JustForVoice_2 Sat, 10/17/2009 - 04:26
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Thank you too much for your response:


how I can know the configuration for:


voice class custom-cptone XXXX

dualtone disconnect

frequency

cadence


I used this site:

http://www.3amsystems.com/wireline/tone-search.htm?start=0&kTone=10


to determine the frequency and cadence.


then under the voice port I added the following:


supervisory custom-cptone XXXX


Is there any thing else before upgrading the system???

paolo bevilacqua Sat, 10/17/2009 - 05:03
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That seems all good, sometime actual tones don't match database, in which case you have to record and frequency analyze, kind of tedious process.

JustForVoice_2 Sat, 10/17/2009 - 05:30
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can you give me more details. how I can record and analyze the frequency?


do you know some program to do this??




paolo bevilacqua Sat, 10/17/2009 - 05:32
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You can record by hooking an IPCP, capture packets on the PC with wireshark and export the sound file.


I then use cool edit to frequency analyze, others may be available.

JustForVoice_2 Sat, 10/17/2009 - 05:44
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I asked you too much, sorry but I hope this is my last question in this conversation. What do you mean in IPCP?

paolo bevilacqua Sat, 10/17/2009 - 07:02
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The softphone. Don't worry asking questions.



JustForVoice_2 Sat, 10/17/2009 - 10:19
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Then I have another question, how we can know the cadence?


you told me how to find the frequency.


Thank you too much.


Correct Answer
paolo bevilacqua Sat, 10/17/2009 - 12:14
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In the sound software, you look at the time interval for tone and silence.

mohammad.elshafie Sun, 10/25/2009 - 02:53
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Hi all,


I faced the same problem and I tried all frequncies, but still the same issue.


Did u solve it "JustForVoice", or it is really a bug?


thanks

paolo bevilacqua Sun, 10/25/2009 - 03:00
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Please open new thread for new problems.

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