Outgoing Audio cutting out (they can't hear me)
Submitted by brainbolt on Tue, 07/22/2008 - 12:43pm.
I'm having an intermittent issue with people on the other end of calls on our system not being able to hear us. In other words, we'll be on a call, and then all of a sudden the person we are talking to cannot hear us, but we can hear them. It will go back to normal after a variable amount of time, then it will cut out again.
Some info about our configuration: We have two locations with linked servers. All incoming calls come in to the server at site A, but we have it setup so that the call rings some extensions at site B so that users at site B can answer the call, and then transfer the call to an extension at site A.
I haven't been able to definitively confirm it, but it seems like the issue happens only in that scenario. If the call comes into site A, and a user at site A answers the call first, it doesn't appear to happen. Like I said though, I haven't been able to confirm.
Has anyone experienced anything like this?
Brain,
This looks like a
Mon, 07/28/2008 - 2:37pm
We are having the same
Fri, 08/22/2008 - 11:50am
We are having the same problem - and we don't have the 'linked site' setup - just a plain old TB 2.6.1 with a VoIP trunk and an Sangoma card. The problem doesn't happen on every call and doesn't seem to be specific ... it happens on incoming and outgoing calls on both the VoIP trunk and the Zap channels. Possibly 5% of calls?
Using Cisco 7940 phones on the same LAN subnet as the Trixbox.
Anybody any ideas?
Bump - same problem here
Fri, 09/12/2008 - 1:46am
We have a very similar problem. Inbound and outbound calls work perfectly, good call quality, no lag and then after a random amount of time audio goes one-way (normally we are not able to hear the caller, but they can hear us)
We have had the same problem on calls over the ZAP (ISDN30) channels and also over an IAX trunk too.
The ISDN is running on a Sangoma A101D card, but given the problem also occurs on the IAX channels I doubt it's to do with that.
Any suggestions appreciated as I have 30 very unhappy women giving me grief every day (but that's another story ;-) )
PS All handsets are Snom.
I'm another user chasing
Fri, 09/12/2008 - 5:50am
I'm another user chasing this problem. Like the first poster it is the far end that can't hear us for a few seconds at random times (~10 minute intervals more or less). I've chased every networking issue I could find and I'll have to either find a better internet line or better firewall. The firewall is a linksys RV082 with a cable modem and a DSL line. I had setup so that all VoIP is on the 3M/600K DSL and have tried it over the 16M/1M cable WAN with the same results. Bandwidth is plenty for our few users and the problem can happen with a single call and no pc traffic.
9 calls out of 10 are excellent but when it does happen I get a nasty gram from the boss. It rarely happens to me but the others are using the phones more often than I am.
Last night I put in a pfSense firewall and routed only the PBX through it. I must say that pf has a lot more control over QOS than the otherwise excellent RV082. Today's test is to turn down the available bandwidth on the RV and see what the PF can do for me. I get a better MOS score through the PF.
We are a small office with a tiny IT budget. So our options have to be reasonable. We won't be able to get a T1 or Cisco level hardware or even a FXO card for the landline. The external FXO works nicely (no silence issues over that) and the SIP/IAX trunks need to fill out the rest of our needs. We did spring for the 55i phones so now the pressure is on me to make every call perfect. 99% perfect is apparently not good enough. That random upstream silence is unnerving however. Almost sounds like silence suppression which of course we don't want.
Are you saying that you've
Fri, 09/12/2008 - 6:32am
Are you saying that you've seen the same over a PSTN line? That would be disturbing news unless there is a simple fix at the pbx. So far I only see the problem over VoIP calls and it doesn't matter which IAX/SIP provider or internet line I use. My PSTN lines route through the pbx but terminate on an external grandstream FXO, so far no complaints for calls from there.
Just to cover the trixbox side of things is there anything related to silence suppression I can look for? To the far end user that total silence is what is disturbing.
Member Since:
2008-05-30