Stuttering outgoing audio BV

[sabcik]

Can anyone please help? My out going audio is all choppy I can hear people fine, but they think I

[mberlant]

How much upstream bandwidth do you really have from the cable company? Is your ATA fighting for a piece of this bandwidth against P2P, gaming, or other bandwidth grabbing applications? Your ATA needs 80kbps in each direction to support this service.

You may want to check your bandwidth at www.dslreports.com and check your VoIP chances of success at www.testmyvoip.com and see what these two sources say about your environment.

[jmvox2]

I too am dealing with stuttering voice (outgoing audio only -- on both inbound and outbound BV calls) issues related to packet loss. Incoming voice quality is quite good. My SPA-1001 (2.13g) info tab shows packet loss on all calls. (No other significant activity on my network.)

Since I am usually on a cordless phone (Panasonic 900mhz), the first thing I did was swap to two different corded phones -- same results. Swapped all my cables after that ... When I got to the router (Trendnet TW100-S4W1CA-- simple NAT), I tried DMZ; and then forwarded SIP, RTP and TFTP ports. No change in voice quality. I then looked at the cable modem (Terayon TJ751x) and my ISP (adelphia 2mb/256k), but Testyourvoip.com tests show good MOS (3.9-4.1) numbers to all their locations, though Golden Phone tests consistently show poor MOS (1.2) and 17-21% packet loss. Extensive ping and traceroute tests (in & outbound) to a wide variety of locations show virtually no packet loss. Latency seems to be as expected. Broadbandreports speed checks confirm better than adelphia's advertised speed: Linkline shows 5mb/428k; Speakeasy 2mb/384k.

All I have left to investigate is the Sipura and BV's network, though I'm not sure how best to do that. I know the issue stems from packet losses, but how to track them down when all the tests I run using my computer and the network show excellent results, but using the phone, sipura, network & BV results in bad test numbers and poor outgoing voice quality?

FWIW, I haven't found a lot of difference switching between the lax and dca proxies other than longer ping times to dca (18ms/70ms). I was on with BV tech support the other night and the support rep, Richard Keller, heard my stuttering voice problem on our in-network call. One last clue: outgoing voice quality is considerably worse on inbound calls than on outbound. Incoming voice quality is equally good on both inbound & outbound.

[skaffloth]

I got the same thing today, they could hardly hear me on the other side. I am using the WISIP, but it is not the WIFI network as I was 3 feet away from the Access Point and alone on the network. I got 512k upstream (for real).

[mteper]

I am experiencing the same problem (also on Adelphia cable). Is that the common denominator here?

-MT

[vido]

i'm on comast and i have the same problem.
rather annoying when i call home from work.

[thehothit]

I've been with Broadvoice since October. Everything was fine until about a month ago. Since then, I've been experiencing frequent choppy outgoing audio.

I use Comcast, and my connection speed is excellent and there appears to be no packet loss (according to my SPA-3000's status page) during a "choppy" call. DSL Reports line checker also reports no packet loss.

I found that switching proxies usually cures the situation temporarily. I use the following proxies:

proxy.broadvoice.com (currently resolving to proxy.mia.broadvoice.com)
proxy-dca.broadvoice.com
proxy.dca.broadvoice.com

It seems as though it is a hit or miss affair. Some calls have great outbound audio (i.e. the person at the other end has no problems hearing me), while others apparently sound choppy and garbled.

I thought that my router may be causing the problem, so I bought a LinkSys WRT54G and installed Sveasoft's Alchemy on it and set up QOS for VOIP (works nicely!), but that didn't solve the problem.

I have a feeling that it has something to do with Broadvoice's proxy servers. I called their tech. support number a couple of weeks ago from a landline and their rep's voice kept on breaking up!!! I told the rep. that his voice was breaking up, and he made a note of it.

I wonder how many other people are experiencing this problem?

[jmvox2]

Here's an update to my earlier post regarding outgoing voice quality issues:

After testing audio quality with another BV user, and extensive pingplotter traces (6hours+) were inconclusive, I decide to start back at the beginning. I bypassed my router and connected my SPA-1001 directly to my cable modem (Terayon 715x). Lo! ..outgoing audio quality was dramatically improved. Funny, it was one of the first things I did and when I first started troubleshooting, and it didn't seem to make a difference. Anyway, I have now replaced my router (Trendnet TW100-S4W1CA) with a Linksys WRT50g and everything seems to be working fine. My testyourvoip Golden Phone test scores have improved to 4.1 MOS.

My old router seems to have been able to pass all my ping and trace tests and handle incoming RTP packets, but been unable to match that performance on outgoing RTP packets.

I guess the lesson is: always check the hardware twice... or thrice!