Voice part of call dropping at 30 seconds

Ambient · 08-19-2007, 03:36 AM

Hi Everyone.

Whilst my D-Link all in one voip router is in for repairs, I decided to bring out my old modem and my Netcomm V100 ata adapter (which, did work fine before). After configuring and the like I make a call and what I'm noticing is that around 30 seconds into the call the voice part just turns off. The call remains connected and I can see data coming down but, no voice.

Strange. So I've tried my 3 different SIP providers directly and there is no problem at all. Go back to using Voxalot and sure enough, every time it'll drop at around 30 seconds.

I'm forwarding ports 5060 and 6000 for both TCP and UDP (the V100 has an RTP baseport option, so I just forwarded it on my NAT anyway) and apart from that there's not a lot of options I can change to diagnose this issue further.

I've tried all combinations with Optimise Audio Path and Symmetric NAT handling on the Voxalot side to no avail as well. Can anyone suggest anything else to try?

Thanks.

martin · 08-19-2007, 04:02 AM

2 possibilities jump to mind:

1. Your device is attempting a re-invite, failing and subsequently dropping the voice stream

2. There is a NAT related issue where your firewall drops the RTP port.

- Does *600 drop after 30secs?
- Does the callee still hear your voice once the dropout happens?

For now I would keep the "Optimize Audio" set to "No" and the "Symmetric NAT" to yes until you get to the bottom of this problem.
.

Ambient · 08-19-2007, 12:38 PM

Hi Martin.

Thanks for the reply. Yeah, I've set those options because I know they were the default behaviour for voxalot for a long time.

Unfortunately the echo test greeting lasts for just over 30 seconds so by the time I start talking, I can't hear myself. So, I tried voicemail with a *500 - was navigating the menus fine and then, nothing.

Tried calling my own home number - was talking to myself fine too; then suddenly the voice part goes, and I gt the standard "I've hung up on you" engaged tone - so the call is actually dropped after 30 seconds though my V100 doesn't seem to detect it.

Sure enough, if I go direct to any SIP it's fine - just not via voxalot. So, I've removed my NAT enteries for it and added my V100's internal IP as DMZ just to make sure and sure enough bzzzt - same problem.

I might try resetting my modem to factory defaults and seeing what happens there.

Thanks.

martin · 08-19-2007, 09:27 PM

Ambient, please check your PMs.
.

Ambient · 08-19-2007, 10:19 PM

Have done so - and replied

I'll re-do some more testing and, with any luck, I'll replicate the error again and post results here (for everyone else).

Ambient · 08-20-2007, 10:02 PM

Just an update for everyone else. I'm using a Seimens Speedstream 6520 modem and when I backed off the firmware to an older verson, this issue went away. I'm starting to wonder if it's BigPond that has somehow managed to disable VOIP calls after 30 seconds via the modem (I'm not using BigPond as my ISP).

I'm still diagnosing this issue with Martin.

Current modem update (that causes this issue) is:

Update_E752_AF5_106-71_a056_v1s

Modem firmware that is a-ok:

Update_E752_AC4_106-29_a056_v1r

Will provide further updates.

08-19-2007, 03:36 AM	#1
Ambient Banned Join Date: Apr 2007 Posts: 11 Thanks: 6 Thanked 1 Times in 1 Posts	Voice part of call dropping at 30 seconds Hi Everyone. Whilst my D-Link all in one voip router is in for repairs, I decided to bring out my old modem and my Netcomm V100 ata adapter (which, did work fine before). After configuring and the like I make a call and what I'm noticing is that around 30 seconds into the call the voice part just turns off. The call remains connected and I can see data coming down but, no voice. Strange. So I've tried my 3 different SIP providers directly and there is no problem at all. Go back to using Voxalot and sure enough, every time it'll drop at around 30 seconds. I'm forwarding ports 5060 and 6000 for both TCP and UDP (the V100 has an RTP baseport option, so I just forwarded it on my NAT anyway) and apart from that there's not a lot of options I can change to diagnose this issue further. I've tried all combinations with Optimise Audio Path and Symmetric NAT handling on the Voxalot side to no avail as well. Can anyone suggest anything else to try? Thanks.

08-19-2007, 04:02 AM	#2
martin Join Date: Feb 2006 Posts: 2,930 Thanks: 528 Thanked 646 Times in 340 Posts	2 possibilities jump to mind: 1. Your device is attempting a re-invite, failing and subsequently dropping the voice stream 2. There is a NAT related issue where your firewall drops the RTP port. - Does 600 drop after 30secs? - Does the callee still hear your voice once the dropout happens? For now I would keep the "Optimize Audio" set to "No" and the "Symmetric NAT" to yes until you get to the bottom of this problem. . __________________ Martin Please post support questions on the forum. Do not send PMs unless requested.*

08-19-2007, 09:27 PM	#4
martin Join Date: Feb 2006 Posts: 2,930 Thanks: 528 Thanked 646 Times in 340 Posts	Ambient, please check your PMs. . __________________ Martin Please post support questions on the forum. Do not send PMs unless requested.

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08-19-2007, 12:38 PM	#3
Ambient Banned Join Date: Apr 2007 Posts: 11 Thanks: 6 Thanked 1 Times in 1 Posts	Hi Martin. Thanks for the reply. Yeah, I've set those options because I know they were the default behaviour for voxalot for a long time. Unfortunately the echo test greeting lasts for just over 30 seconds so by the time I start talking, I can't hear myself. So, I tried voicemail with a *500 - was navigating the menus fine and then, nothing. Tried calling my own home number - was talking to myself fine too; then suddenly the voice part goes, and I gt the standard "I've hung up on you" engaged tone - so the call is actually dropped after 30 seconds though my V100 doesn't seem to detect it. Sure enough, if I go direct to any SIP it's fine - just not via voxalot. So, I've removed my NAT enteries for it and added my V100's internal IP as DMZ just to make sure and sure enough bzzzt - same problem. I might try resetting my modem to factory defaults and seeing what happens there. Thanks.

08-19-2007, 10:19 PM	#5
Ambient Banned Join Date: Apr 2007 Posts: 11 Thanks: 6 Thanked 1 Times in 1 Posts	Have done so - and replied I'll re-do some more testing and, with any luck, I'll replicate the error again and post results here (for everyone else).

08-20-2007, 10:02 PM	#6
Ambient Banned Join Date: Apr 2007 Posts: 11 Thanks: 6 Thanked 1 Times in 1 Posts	Just an update for everyone else. I'm using a Seimens Speedstream 6520 modem and when I backed off the firmware to an older verson, this issue went away. I'm starting to wonder if it's BigPond that has somehow managed to disable VOIP calls after 30 seconds via the modem (I'm not using BigPond as my ISP). I'm still diagnosing this issue with Martin. Current modem update (that causes this issue) is: Update_E752_AF5_106-71_a056_v1s Modem firmware that is a-ok: Update_E752_AC4_106-29_a056_v1r Will provide further updates.