Outgoing issues RT31P2

Posts: 15 · Vonage Forum Associate Joined: Mar 02, 2005 Posts: 15

Location: Murfreesboro, TN (Nashville 'burb)
Provider: Comcast
Cable Modem: Scientific Atlanta's Webstar DPX100
Vonage Adapter: Linksys RT31P2
Current setup: Modem > Linksys > 3 Buffalo WBRG54's and a Uniden TRU8866 system

Speed test from dslreports.com:
2005-11-03 00:05:18 EST: 3757 / 344
Your download speed : 3757 kbps or 469.7 KB/sec.
Your upload speed : 344 kbps or 43 KB/sec.

Vonage Speed Test Results:
Download 3,524,320 bps
Upload 344,648 bps
QOS 49%
RTT 68 ms
MaxPause 234 ms

Testyourvoip.com Test Results TO Boston:
MOS Analysis from You TO Boston
Media Quality MOS 4.0 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.57 60.3%
Latency 0.00 0.0%
Packet Discards 0.38 39.7%
Packet Loss 0.00 0.0%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 156 ms
Packet Discards 1.5%
Packet Loss 0.0%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 40 ms
Random Loss

Jitter Min: 0 ms
Avg: 8 ms
Max: 56 ms

Signaling Quality Post-Dial Delay 78 ms
Call Setup Time 94 ms
Media Delay 219 ms

Lately our outgoing calls have been getting worse and worse, with people unable to hear us, choppy and/or garbled audio. Up until tonight, I'd had the Linksys running behind the Buffalo in a DMZ with no QoS. When configured that way, I got a 4.2 on the testyourvoip.com test. Now, I'm getting the above. I've enabled QoS on the Linksys, but it's set at 512Kbs. Should I set that to 300kbs so it's more within my upload range?

This is, of course, one of those intermittent problems which can happen at any time of the day. Could it be the Webstar modem? I thought I read on the forums somewhere that I need a certified DOCSIS 2.0 modem, and I believe this is only certified for 1.1. Any help would be appreciated.

Thanks,
Patrick

Posts: 19 · Vonage Forum Associate Joined: Oct 19, 2005 Posts: 19

It looks like you have a good deal of packet discards which is similar to what I am seeing.

You noted in your subject that you are having outbound issues, so inbound is ok? Reason I ask is that I am having the same issue. Outbound had been poor at best, inbound - perfect!

Posts: 2257 · Posted: Thu Nov 03, 2005 9:49 am Post subject: Re: Outgoing issues RT31P2

hawkmultimedia wrote:

This is, of course, one of those intermittent problems which can happen at any time of the day. Could it be the Webstar modem? I thought I read on the forums somewhere that I need a certified DOCSIS 2.0 modem, and I believe this is only certified for 1.1. Any help would be appreciated.

Thanks,
Patrick

I have a Linksys BEFCMU10, which is currently loaded with 1.0.9 of the firmware (DOCSIS 1.0). My ISP has *recommended* a 2.0 compliant modem, but they have stated that they will gladly *support* my 1.0, and my Vonage service works perfectly.

The rest of the Vonage-supplied Linksys router has given me no end of heartache, but the Vonage part works GREAT.

2.0 would probably help, but I'd call your ISP with that packet discard info and ask them what to do. They might give you a loaner 2.0 modem (or replace it if you are renting their gear) to help diagnose the problem, if they think it's modem-related.

Also, if you have a router, try pypassing it and making your connection straight from a computer to the Modem. See if that changes your numbers...

Posts: 15 · Vonage Forum Associate Joined: Mar 02, 2005 Posts: 15

Thanks for the replies. Of course, now that I've screwed with my network, I can't remote into it today. So, I will try straight from the modem tonight. And, yep, this is only outbound traffic. Inbound has always been fine.

Posts: 19 · Vonage Forum Associate Joined: Oct 19, 2005 Posts: 19

Anyone know what the difference is between inbound and outbound? Why inbound would always be perfect but outbound poor? I posted this in another thread "On way calls". I was curious if it has to-do with the codec. I have mine set to 50 but it seems that people tell me when I call them I sound far away. But if it is an inbound call, they say I sound perfect.

Not trying to jump in with that ? in this thread but it seems as if your problem and mine seem related and I don't understand how inbound differs from outbound.

Thanks everyone!

Posts: 277 · Posted: Thu Nov 03, 2005 10:30 am Post subject: Re: Outgoing issues RT31P2

hawkmultimedia wrote:

I thought I read on the forums somewhere that I need a certified DOCSIS 2.0 modem, and I believe this is only certified for 1.1.

I'm also on Comcast, and although I have a modem certified for DOCSIS 2.0, Comcast network is still running DOCSIS 1.1, they haven't yet gone to 2.0. So my 2.0 certified modem is on 1.1. By the way, you can get to a set of status pages for most cable modems at http://192.168.100.1/

So if your modem is dropping too many packets, a new modem might solve the problems, but not because its DOCSIS 2.0.