NO DSP problem

[nima_sa]

Hi everyone

i've been struggling with a cisco 2811 router and fxo lines which is very strange i think . every 1 week , 2 FXO ports of voice gateway become off-hook until i administratively shutdown and the no shutdown the ports . i dont know what is a exact problem ..the output of ports configuration and command  are shown below...also i attach the screenshot the problem .

voice-port 0/0/1

translation-profile incoming PSTN-I
translation-profile outgoing PSTN-O
supervisory disconnect dualtone mid-call
supervisory dualtone-detect-params 1
echo-cancel coverage 24
echo-cancel mode 2
no vad
no comfort-noise
cptone IE
timeouts call-disconnect 3
timeouts wait-release 5
connection plar 219
impedance complex2
description 26450120
caller-id enable

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voice-port 0/1/0

translation-profile incoming PSTN-I
translation-profile outgoing PSTN-O
supervisory disconnect dualtone mid-call
supervisory dualtone-detect-params 1
echo-cancel coverage 24
echo-cancel mode 2
no vad
no comfort-noise
cptone IE
timeouts call-disconnect 3
timeouts wait-release 5
connection plar opx 200
impedance complex2
description 22828955
caller-id enable

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thanks in advance :)

[Philip D'Ath]

I don't know the answer.  I am suspicious of a software issue since it seems to work fine for a week and then the issue happens.  If it was me I would start by upgrading the IOS to a gold star release such as 15.1.4M12a.

https://software.cisco.com/download/release.html?mdfid=279120799&catid=268437899&softwareid=280805680&release=15.1.4M12a&relind=AVAILABLE&rellifecycle=MD&reltype=latest

[nima_sa]

thank you philip for your response;

i think i should upgrade it first ..but i dont know how can i deal with licensing part ....so you think my configuration is not a problem ? do you think maybe PVDM causes the problem ??

[Philip D'Ath]

I don't know.  I would try a software upgrade first.

[Alok Jaiswal · Accepted solution]

Can you try the below:

under the voice-port try to add 

No batter-reversal

if that doesn't fix it, try to 

voice-card 0
no local-bypass

Regards,

Alok

[nima_sa]

thank you Alok

i am going to issue these commands and i will inform you about the result . but could you please tell me about the second command ? (Voice-card )

is this command working on FXO cards ??

Thanks

[nima_sa]

Dear Alok

i've not had this problem anymore after these command you told me ...i think the issue is resolved. thank you so much