DTA, g.711, and pops

Has anyone else experienced frequent pops in the audio while using the g.711 codec on the DTA? This problem has plagued me since day 1. Another user at BBR reported the problem and said it wasn't present when configured for g.729. Indeed, with my other account I don't have the problem and I assume I'm configured for g.729 since I've never been able to adjust the setting (since Manage Adapters has been down long before I received the device for that account).

My assumption is that others are not having this problem or are not set for g.711 since I don't see this problem discussed.

Try chaning the codec settings now.

Try changing the settings for your adapter now, The manage adapter settings application is now online and working.

Thanks,

Ilya

Thanks. I just changed my other adapter to g.711. We'll see if both adapters do the same thing when set at that codec.

But I guess no one else is getting this problem since I haven't seen any other posts on it.

Okay this seems to be a problem.

When the Manage Adapters screen became available again I changed the codec setting for my second DTA to g.711. Even after 24hrs I didn't get the same dropouts and static that I experienced with my soho line configured at g.711. So I wondered about two things:

1) Maybe this is a problem with the UPS since the soho adapter was connected to the battery backup outlets while the second adapter was only connected to the surge suppression outlets. My thinking here is that this could be a line voltage problem.

2) Maybe the second DTA did not reconfigure itself for g.711 despite the fact that I changed the setting in the portal.

So I did two things: 1) I switched the soho adapter to the surge suppression only outlets on the UPS (plugging it into the same place as the second adapter). 2) I power-cycled the second DTA, forcing it to pick up its config file again, which should put it into g.711.

This is what I noticed, the sound remains unchanged with the soho adapter. I still get the same static pops and buzzes throughout a phone call--just calling voicemail reveals this. Meanwhile, the second adapter now appears to be suffering from the same problem. This points to g.711 being the problem.

But I would not rule out that this is a problem with line voltage. This could be a hardware issue. Either way, it's a big problem because it detracts from the use of g.711 and the longer the conversation is the more annoying the problem becomes.

Here's a link to the post from the BBR VOIP forum where this problem was first mentioned:

http://www.dslreports.com/forum/remark,10982621~mode=flat?hilite=broadvox static#10982621

Other than me, I don't think anyone else has reported this problem (in this or the other VOIP forum) and I find that strange. Is no one using g.711?

I have an adapter set to g729 and one to g711 in my home. Both connected to the same power strip, both connected to a switch obtaining individual public IP addresses from my cable modem. I have a third DTA in my home connected to a switch that is connected to a router, that is then connected to one of the DTA's; connected to the cable modem (did that make sense?).

I have had no such problems on any of my units, sound is perfect.

Yeah Jeff, that totally makes sense. I have IM'd the user that complained about this in the other forum wondering if he/she still has the problem. I'm going to be out for a week so I'll have to pick this up again later.

It's odd that this should only affect the audio when using g.711.

Edit: As an after thought...I'm wondering if this could be a problem with the gateway. Maybe this is something that is only affecting people that have a number assigned from the 703 area code. I bet the other person also has a 703 number assigned. That would certainly explain why other people haven't experienced this problem.

Actually I had not thought of looking at our FAQ, it is available in the end user portal. Here is a direct link and it looks like we have some information about this. The information here is related to the technology overall and not the DTA, or specifically Broadvox for that matter.

https://portal.broadvoxdirect.com/kb/kb.asp?list=93

I didn't think of that either. Doh! I'm going to try connecting it to a completely different UPS and see if that fixes the problem....if it still exists (I've been away for the past 10 days).