Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Handheld Radio Causes 7940/7960 Reboot?

Here's a good one...

Gonna start a TAC case Thursday, but in the middle of a 400+ phone rollout, we just discovered that 469MHz (licensed) handheld radios cause the 7940's and 7960's to reboot when the radio is keyed within a couple of feet of the phone. A little experimenting says it happens in a range of about [405.5-486.5 MHz].

Is there some new 440MHz processor in some of these phones? It's not all 7940's or 7960's, but a good cross-section of them -- with little logic to serial/rev #'s.

Anyone heard of that little gem before?

Mike

  • Other Collaboration Voice and Video Subjects
4 REPLIES
Silver

Re: Handheld Radio Causes 7940/7960 Reboot?

Would suggest you to try some other load for a couple of phones which are rebooting very consistently.

New Member

Re: Handheld Radio Causes 7940/7960 Reboot?

We had the same problem with radios being near the phones. When the radio transmitted, it rebooted the phone. Did Tac Provide any workaround?

Don

New Member

Re: Handheld Radio Causes 7940/7960 Reboot?

Don -

Workaround, no. But definitely get a TAC case open. They should be able to come up with something for you.

Mike

New Member

Re: Handheld Radio Causes 7940/7960 Reboot?

We are experiencing the same issue. Random selection of phones. From a forum search I found this:

"Its likely that there is a floating ground in the ac circuit at this site or ground was lost on conduit. Get an electrician to check it out or get a ground checker from a hardware store (fairly cheap) and check out the circuit. If ground or conduit ground is lost then rf sheilding is lost and RF will induce HF voltage spikes on ac line."

I'm going to have this checked out. Dunno what else to do otherwise.

106
Views
0
Helpful
4
Replies