[bockwai]

Im having a problem with my BV service in that at regular intervals throughout any call I make or receive the caller's voice will start skipping like a scratched record and then after maybe 3-4 seconds will continue on as normal. This causes a breakup in conversations that is most annoying. Happens to the caller on the other end with my voice also. I havent been able to figure out why this is happening but its been a problem for over a month now using BV. Im on Comcast cable and the testmyvoip.com results are well beyond the minimum requirement. Ive tested for this problem without any other bandwidth hogging apps running on my home network and it still happens. Also, tested it using every possible BV proxy server and it makes no difference regardless of the ping times I get from the best source. Im wondering if its a problem with the Parkervision router. I just upgraded its firmware and hope that fixes this problem. Any help or suggestions appreciated.

[mberlant]

Who is provisioning your device, you or BV? If it is you, go into your Line 1 (I presume) page and raise the setting of the Network Jitter Level. It is probably set to "high", so you will move it to "very high".

If BV is provisioning your SPA you will need to ring them on 611 (be patient and keep calling back until you get a live human being) and ask them to make the necessary adjustments to your profile.

[bockwai]

Im provisioning the device myself. Could you be more specific as to what you mean by Network Jitter Level? Im using a Grandstream Handytone 286 ATA. Are you referring to iLBC Frame Size or iLBC Payload Type or Voice Frames per TX? Layer 2 or 3 QOS? Thanks for the help.

[mberlant]

Sorry. I assumed that you were using a Sipura adapter. I'll need to dig out my Grandstream ATA to see if/where the equivalent setting is in that device.

The Jitter Buffer is where the ATA temporarily stores the incoming voice packets, hoping that a "silence" packet will come in before the buffer fills with non-sequential packets. Since there are absolutely no delivery guarantees in the internet, it is very common to have lost and out-of-sequence packets, which cause breakup and static if they overwhelm the Jitter Buffer. By making the buffer larger you trade a little bit of latency for more smoothness.