Anyone else had trouble getting a good incoming voice stream on a D-Link DIR-655 router? Outgoing voice is fine, but incoming is constantly choppy regardless of load. All other network connections are clean.
I recently switched out an older Belkin Pre-N router for the newer 655 and the problem appeared. The Belkin had no choppy issues. No other network changes.
I have the automatic QOS running, and have also tried to manually set QOS rules for the static IP. Also, tried putting the LinksysPAP outside the firewall and turning off the auto packet 'defragmentation' option. None of these changes made a difference. I haven't tried to disable the SPI on the FW yet, but I really don't think this is going to do much since putting the Linksys outside the FW (in the DMZ) made any difference.
Details as follows:
Adapter is a LinksysPAP2 running 2 phones with a static IP. Motorola Modem -> Dir-655 wireless router -> Netgear WGPS606 wireless bridge -> LinksysPAP2
Any ideas? I'm running out of them... Thanks in advance!
Speed test statistics --------------------- Download speed: 14833640 bps Upload speed: 2459472 bps Quality of service: 69 % Download test type: socket Upload test type: socket Maximum download pause: 115 ms Average download pause: 2 ms Minimum round trip time to server: 21 ms Average round trip time to server: 50 ms
Voip test statistics -------------------- Jitter: you --> server: 3.3 ms Jitter: server --> you: 0.0 ms Packet loss: you --> server: 0.0 % Packet loss: server --> you: 100.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 41 Estimated MOS score: 3.6
Yeesh. Packet loss server to you is 100%. It's a wonder that it's working at all.
The first thing I'd do is verify the source of the problem. First remove the Netgear and re-check the phone quality and re-run the test. Assuming no change, remove the new D-link. If that verifies that the D-link is the problem, then troubleshoot from there. I'd start by completely disabling QoS and turning the firewall off completely.
Hmm. Interesting about the packet loss...I'll definitely check into that because its so weird and I'll try the other things as well - but remember that this same setup was all working perfectly until I switched out my Belkin router for the DLink.
I'll let you know in a couple of days what I find.
- completely disable the FW, - turn off the Stateful Packet Inspection - forcibly setting my router Connection Type to "Cable or Other Broadband" (it was auto-sensing to "xDSL or other frame relay network" for some reason) - add a QOS rule (even though I don't believe this should be required since the Automatic option should do this anyway) to allow ALL traffic (UDP, TPC, ICMP etc) to/from the static internal Linksys PAP IP with highest priority - port forwarding for UDP ports 21,53,69,123,2400,5061, 10000-20000 has been set for the Linksys static IP
None of these seem to have made a difference to the incoming sound quality, however as soon as I put my original Belkin pre-N router back in the mix, replacing the new D-Link 655 router, it works fine again.
Due to location issues I have not been able to remove the Netgear wireless bridge from the equation, but since it works fine with this in place with the Belkin, I really don't think this is the cause unless there's some conflict.
Any other thoughts or ideas, no matter how weird sounding? This is driving me nuts and I really want to stick with the D-Link 655 but at this rate I don't think I'm going to be able to...
Server to me packet loss is still showing as 100% which is so weird since calls are largely intact.
The PC running the Voip tests is wirelessly connected to the DLink router.
I am not able the change the Linksys location easily (don't ask...), but will try to do so over the weekend. At the same time I will also wire the testing PC directly to the same Netgear bridge which will mimic the current location of the Linksys.
I'll let you know what I find, but in the meantime I have also tried turning off the QOS completely and this didn't fix it. I am in the process of trying to disable 'traffic shaping' but since this requires a reboot I can't complete it until this evening.
Well I got some of the tests done that I wanted to do, as follows:
I got the Traffic Shaping on the router completely turned off but this doesn't seem to have made much difference.
I also wired my test laptop via CAT5e to the Netgear bridge which the LinksysPAP hangs off, to mimic the setup for the Voip test. The results are as shown, still with the Server> Me at 100% loss, which I really can't explain other than I'm seeing some kind of exception in the testing process.
Speed test statistics --------------------- Download speed: 8756832 bps Upload speed: 2092552 bps Quality of service: 19 % Download test type: socket Upload test type: socket Maximum download pause: 440 ms Average download pause: 3 ms Minimum round trip time to server: 32 ms Average round trip time to server: 38 ms
Voip test statistics -------------------- Jitter: you --> server: 5.3 ms Jitter: server --> you: 0.0 ms Packet loss: you --> server: 0.0 % Packet loss: server --> you: 100.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 35 Estimated MOS score: 3.6
...More interestingly is the Quality of Service which is now only 19%. I actually ran the test twice and the first time it only came in at a horrible 10%. Not sure if this is related to the turn off of the QoS and Traffic Shaping on the router, but I'll turn these back on again shortly and retest to see if it is indeed related.
I'll update when I get the opportunity to relocate the LinksysPAP to hang directly off the DIR-655, but apart from that I'm out of options.
Re-enabled QOS and Traffic Shaping, running the test several time shows that the quality is fluctuating a load (24%, 49% etc)
The download and upload speeds are also fluctuating quite wildly (I saw Download of 3.6 Mbps and more than double that in 2 tests in the space of about a minute) Upload speeds remained relatively consistent just over 2Mbps.
I suspect that there's something up in the area right now. So I'll run the wired tests again during the day this week to recheck.
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