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New Member

Call from PSTN E1 ISDN PRI to Cisco 7920 crackling noise

Hello everybody.

When I received a call from PSTN through PSTN>H323 GATEWAY>CCM>Access Point>Ciso 7920. I hear a crackling noise on the phone but if I make a call backwards from Cisco 7920 to PSTN it works fine.

The other phones like Cisco 7912 and Cisco 7960 work fine in both directions from PSTN and to PSTN.

Regards

Walter

5 REPLIES
Hall of Fame Super Gold

Re: Call from PSTN E1 ISDN PRI to Cisco 7920 crackling noise

Hi,

the fact that depedning on the direction of the call the problem occurs, is a bit strange. Which FW do you have on the 7920 ?

New Member

Re: Call from PSTN E1 ISDN PRI to Cisco 7920 crackling noise

Hi Bevilacqua

The firware on all the Cisco 7920 is 7920.4.0-03-01.

According to the TAC informacion about crackling noise is a battery problem I have tried 5 differents phone and I get the same problem.

Regards.

Hall of Fame Super Gold

Re: Call from PSTN E1 ISDN PRI to Cisco 7920 crackling noise

Thanks for letting us know, this is bad, as cisco admits the problem is with the phone, you should be able to send them back and either they give you ones that have no problem, or credit for another purchase.

New Member

Re: Call from PSTN E1 ISDN PRI to Cisco 7920 crackling noise

Hello Bevilacqua.

Do you have the information where cisco admits the problem with the phone??

Regards

Walter

Hall of Fame Super Gold

Re: Call from PSTN E1 ISDN PRI to Cisco 7920 crackling noise

I was relying on what you said, I guess an email from tac or case details are sufficient the bring up the matter with the sales representative.

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