I've been reading the postings here for quite some time. My service has never been excellent, but I ran the speed test and I believe my ISP is the problem (AT&T). I've attached the results and was wondering what specifically do I need to tell the technicians at AT&T that needs to be improved? I usually hear the caller very well, but they often complain that my voice is jarbled, so it is my outgoing that is the problem. I have QoS enabled on my network. This is my setup:
Netopia 2241N DSL modem (bridged ethernet mode) -> Dell 1800 PowerEdge Server (Small business server 2003 R2) -> Level One Fast Ethernet Switch -> All computers and two Motorola V2441 adapters.
QoS enabled on both network cards in the Server
I get similar results if the server is removed and the netopia DSL modem is set as a router. I have to keep the Netopia in bridged mode because I host my own e-mail.
Thanks for any advice.
Speed test statistics --------------------- Download speed: 2728000 bps Upload speed: 424992 bps Quality of service: 70 % Download test type: socket Upload test type: socket Maximum download pause: 94 ms Average download pause: 10 ms Minimum round trip time to server: 56 ms Average round trip time to server: 256 ms
Voip test statistics -------------------- Jitter: you --> server: 2.3 ms Jitter: server --> you: 3.6 ms Packet loss: you --> server: 0.0 % Packet loss: server --> you: 0.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 7 Estimated MOS score: 4.0
Actually, the round trip time is a bit high, but those results aren't too bad. What happens if you plug your computer directly into the DSL modem for a test? Also, try running a test at www.testyourvoip.com, test call to Boston. How does that look?
This is the test result from the server (directly connected to the DSL modem) with the Local Area network removed, only connected to the internet. I'll now try the other test you recommended.
Speed test statistics --------------------- Download speed: 4135968 bps Upload speed: 431408 bps Quality of service: 78 % Download test type: socket Upload test type: socket Maximum download pause: 94 ms Average download pause: 7 ms Minimum round trip time to server: 57 ms Average round trip time to server: 313 ms
Voip test statistics -------------------- Jitter: you --> server: 0.2 ms Jitter: server --> you: 3.8 ms Packet loss: you --> server: 0.0 % Packet loss: server --> you: 0.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 7 Estimated MOS score: 4.0
It appears my latency is the problem. I'm not sure how to fix that. Is it something I can tweak in my server maybe or is it an ISP problem?
Test Details
The information below explains why your call quality score (MOS) was less than perfect. Find the results that you want more quickly... Jump to: Media Quality Signaling Quality
MOS Analysis From You TO Boston MOS analysis chart Media Quality MOS 4.4 / 5.0 (Best with G.711 is 4.4)
Degradation Sources Codec 0.58 100.0% Latency 0.00 0.0% Packet Discards 0.00 0.0% Packet Loss 0.00 0.0% Codec G.711 (PCM at 64kbps, 20ms RTP payload, 80kbps IP BW) Round-Trip Latency 179 ms Packet Discards 0.0% Packet Loss 0.0% Loss Periods Min: 0 ms Avg: 0 ms Max: 0 ms No Loss Jitter Min: 0 ms Avg: 6 ms Max: 14 ms Signaling Quality Post-Dial Delay 125 ms Call Setup Time 125 ms Media Delay 265 ms
MOS Analysis FROM Boston To You MOS analysis chart Media Quality MOS 4.4 / 5.0 (Best with G.711 is 4.4)
Degradation Sources Codec 0.58 100.0% Latency 0.00 0.0% Packet Discards 0.00 0.0% Packet Loss 0.00 0.0% Codec G.711 (PCM at 64kbps, 20ms RTP payload, 80kbps IP BW) Round-Trip Latency 179 ms Packet Discards 0.0% Packet Loss 0.0% Loss Periods Min: 0 ms Avg: 0 ms Max: 0 ms No Loss Jitter Min: 4 ms Avg: 6 ms Max: 20 ms Signaling Quality Post-Pickup Delay 117 ms Call Setup Time 127 ms Media Delay 148 ms
Your round trip time is high, and just as bad, or worse, with your local LAN equipment removed. I think we can eliminate that equipment as the problem. Your speeds look good, assuming that you're not paying for something better.
As you say, latency/round trip time/delay seems to be an issue. That's what I'd tell the tech, but don't be surprised if you don't get much help. If the speeds are up to their standards, they're likely to call it a day.
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