Cisco IP Phones dropping calls out of the blue

[Hankejp]

Just wondering ifanyone has come across this problem. In one of our buildings we have multiple users who when talking on their 7940's are having their calls drop. There's no noise or anything when the calls drop the phone just goes dead. The user can dial a new number right away and the phone doesn't reset. It can be when talking to a number outside the business or inside, IP to IP, IP to Mitel, it doesn't matter. We had some engineers look at all of our routing logs and they say everything seems to be fine with them. The next step for us is to wait for a user to get a call dropped and to look in the logs as to why it was dropped.

Just wondering if anyone is or has experienced this problem.

 

[MG2005]

what does rain have to with VoIP ??

its voice over IP not voice over the atmosphere

wireless, satellite, etc may have problems when it rains...VoIP does not have issues when it rains

look for another pattern lol

 

[jneiberger]

You're exactly right! Rain might cause the outside wiring to get wet, which will cause awful noise and dropped calls, but that has nothing to do with VoIP.

On the other hand, perhaps some VoIP gateway devices have interfaces that are more sensitive to that sort of noise than a TDM PBX would be.

I've seen something similar in the data world where old equipment is running fine with a noisy data line, but all sorts of problems occur when the hardware is upgraded and the new hardware is more sensitive to noise. Perhaps this voice issue is similar.

John

 

[MG2005]

i can see more people being home from work in the rain meaning more internet congestion, meaning if you use voip and you have calls that traverse the internet, you may have some quality issues...

but thats really voice over internet and not really voice over IP per say...

or there is something on the path/route of the IP call that has issues with weather...like a carrier that uses satellite or wireless or some equipment that can be affected by weather...but again VoIP is not to blame, its the equiupment somewhere along the path of that call

but on a private network with QoS and dedicated connectivity between sites weather should have no effect..

 

[SStieferman]

???? Verison admits increased call vol on rainy days for VoIP networks????? If I called them with an Exchange problem would they have told me "Microsoft Exchange doesn't handle damp circuits very well"?

HOW DO YOU TRUNK YOUR CALLS TO THEM?
---IF---
YOU DO HAVE DATA LINES AND ARE PASSING VoIP DIRECTLY TO VERISON, THEN I WOULD GUESS THAT EVERY OTHER PIECE OF NETWORK GEAR WAS SPITTING OUT ERRORS AS WELL?

Final question. Did you replace a TDM switch with IP to fix this problem?