[cisco-voip] 7960 periodic pop noise

[Matt Slaga (US)]

Some of the older 7940/60s had a 400Mhz processor.  Nextel phones transmitted at 400Mhz.  You could literally reboot the Cisco phones by putting the Nextel phone really close to the cisco phone and pressing 'push to talk'.

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Teixeira, Mike
Sent: Wednesday, August 26, 2009 1:30 PM
To: 'Chris Ward (chrward)'; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] 7960 periodic pop noise

We are replacing the 7960s with 7945s. We ordered the new phones but they haven't arrived yet.

Our old Nextel phone, when active, would cause a 7960 to make noise when on a PTT call  and receiving PTT. I'll do more testing.

A while ago I was running the stage for a concert. During the concert the bass player had his iPhone on top of his amp. Everytime the iPhone received data the amp made a horrible noise. If I have my data correct, the cause was the bass player's iPhone was GSM.

Mike
From: Chris Ward (chrward) [mailto:chrward at cisco.com]
Sent: Wednesday, August 26, 2009 10:25 AM
To: Teixeira, Mike; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] 7960 periodic pop noise

There is/was an issue where certain cell phones, when placed too close to a 7960/40 would cause the ip phone to make some noise. I don't recall if it was a pop or not, but it was an odd sound. There was no solution but to move the cell phone farther away from the ip phone.

Other than that, if it only happens at idle, I have no idea. Does replacing the phones resolve it? And what model are you replacing the phones with?

-Chris

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Teixeira, Mike
Sent: Wednesday, August 26, 2009 12:47 PM
To: 'cisco-voip at puck.nether.net'
Subject: [cisco-voip] 7960 periodic pop noise

Hello,

Recently a few of my old 7960s have been making a periodic pop noise, like it does when it is powered on with POE. This happens when the phone is only idle.

I am going to replace these, as the users report them, since they are EOL. Anyone have any experience on this?

Thanks,
Mike



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