Incoming calls - computerized/choppy

Posts: 16 · Vonage Forum Associate Joined: Mar 05, 2005 Posts: 16

Over the last week or two, some of our incoming calls become computerized/robotic/choppy sounding. This only happens on incoming calls. Usually calling the person back solves the problem.

setup:
Motorola SB4200 Hooked up to a Linksys WRT54G Running Sveasoft Firmware>Linksys RT31PT2

I wondering if I am getting some kind of electrical interfernce. I moved my routers around some last night and the problem seemed to disappear only to return this morning. I ran some tests yesterday and they seemed ok. Once I get home I can post some results. Any ideas? I will probably move some things around to try to eliminate any chance of electrical interference as a first step.

Posts: 1 · New Forum Member Joined: Jul 08, 2005 Posts: 1

I have the exact same problem as you with a similiar configuration.

Posts: 16 · Vonage Forum Associate Joined: Mar 05, 2005 Posts: 16

My problem is gone. I had a short in my power adapter. I replaced it and the interference has gone away.

Posts: 646 · Posted: Tue Jul 12, 2005 10:32 pm Post subject:

Which device's power adapter did you replace? What did you replace it with?

Posts: 102 · Vonage Forum Senior Joined: Jul 04, 2005 Posts: 102

yes please post your info. this is good troubleshooting info. i have the wrt54 GS and the same phone adapter with a linksys modem

Posts: 16 · Vonage Forum Associate Joined: Mar 05, 2005 Posts: 16

I replaced the power adapter for the Linksys WRT54G.

I believe that this is the one I replaced it with:
12V/1000mA AC-to-DC Power Adapter
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=273-1776

Posts: 7 · New Forum Member Joined: Jan 31, 2005 Posts: 7

lsdean wrote:

Over the last week or two, some of our incoming calls become computerized/robotic/choppy sounding. This only happens on incoming calls. Usually calling the person back solves the problem.

setup:
Motorola SB4200 Hooked up to a Linksys WRT54G Running Sveasoft Firmware>Linksys RT31PT2

I wondering if I am getting some kind of electrical interfernce. I moved my routers around some last night and the problem seemed to disappear only to return this morning. I ran some tests yesterday and they seemed ok. Once I get home I can post some results. Any ideas? I will probably move some things around to try to eliminate any chance of electrical interference as a first step.

I have been having the same problems except it's on both incoming and outgoing calls. Some of the caller's words drop out or get a springy metallic quality to them. Unfortunately, in the last week I also upgraded my cable modem service to .8/10Mbps and changed my cable modem from an SB3100 to a SB5100. I thought it was my new hardware but the problem comes and goes. It's really bad today, but last night it was fine. It is very frustrating. It sounds like packet loss but I have nothing else running to use any bandwidth.
Otherwise my internet connection is fine and I'm enjoying the increased speeds.

My configuration:
SB5100 (2 WAN IPs)
5 port 10/100 switch
RT31P2 | BESFX41
nothing | PCs/WAP/16 port 10/100 switch

Posts: 1389 · Posted: Thu Jul 14, 2005 3:37 pm Post subject:

Packet loss and bandwidth are separate of themselves...you can have lower bandwidth with low packetloss and be ok...I have seen people with 8 mbps down and 1mbps up and with high latency and packetloss and have bad quality...

Try www.testyourvoip.com and do a test call to Boston. The look at the detailed results showing to and from boston and post them here...

Posts: 34 · Vonage Forum Junior Joined: Apr 05, 2005 Posts: 34

OK, Here's my problem. I have 2 Linksys RT31P2 on a partial T3 connection (9.5Mb up / 8.5Mb down). Both have substattial audio dropouts in both directions about every 90 seconds. The two routers are directly connected to the Internet through a Cisco Catalyst Switch and have Internet IPs. I also have a softphone on my laptop that sits behind a PIX 515 which is also connected to the Catalyst Switch. The Softphone works flawlessly with no audio dropouts.

The 2 Linksys adapters have nothing but dropouts. I have tried giving them private IPs and placing them on the internal network with the same dropout problems.

Considering the MOS figures are in the 4.1 - 4.4 range every time I test and that the Softphone works perfect, I think it has to be a setting in the Linksys routers that are causing problems.

Any thoughts on what I can try?

Doug

MOS Analysis from You TO Boston
Media Quality MOS 4.2 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.58 73.9%
Latency 0.00 0.0%
Packet Discards 0.20 26.1%
Packet Loss 0.00 0.0%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 101 ms
Packet Discards 0.8%
Packet Loss 0.0%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 40 ms
Random Loss

Jitter Min: 0 ms
Avg: 2 ms
Max: 29 ms

Signaling Quality Post-Dial Delay 81 ms
Call Setup Time 91 ms
Media Delay 221 ms

MOS Analysis FROM Boston To You
Media Quality MOS 4.4 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.57 96.8%
Latency 0.00 0.0%
Packet Discards 0.02 3.2%
Packet Loss 0.00 0.0%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 101 ms
Packet Discards 0.1%
Packet Loss 0.0%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 20 ms
Random Loss

Jitter Min: 0 ms
Avg: 3 ms
Max: 20 ms

Signaling Quality Post-Pickup Delay 119 ms
Call Setup Time 120 ms
Media Delay 150 ms

Posts: 10 · Vonage Forum Associate Joined: Dec 16, 2004 Posts: 10

I've been complaining to Vonage about this exact problem for at least a month now. This has been happening sporadically for 2 months now. I have an open trouble ticket. It is to the point now that I have to seriously consider dumping them after 2+ years as a business and residential customer. This is happening on both of my lines. Now I just answer my cellphone with the simulring feature as I have free incoming on it.