[WXC/VFX] VFX downstream comes and goes during call

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Aaryn015

104 posts

Master Geek

Topic # 24391 22-Jul-2008 19:56

Hi there. Has anyone seen this problem before? As it is an problem that is occuring on every call for us now.

What we have is when we either make a call, or receive one, we lose sound from the other end periodically. Usually around every minute, lasting 5-10 seconds. Our callers say they can hear us say "are you there", but we simply can't hear them. Just silence. No static or strange sounds.

Doesn't effect the internet, and we don't have dropouts much anymore either. This is just VFX.

Unfortunately, I don't have another router to test. But I have a DLink 502T modem and a Lynksys WRP400 setup.

My cell is poked and obviously the landline is no good. So posted here.

Cheers
Aaron

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Reply # 150530 23-Jul-2008 07:26

Hi Aaron

Seen something similar but in the opposite direction, with an Linksys AM300 and this was a faulty router, replaced it with exactly the same router and all was fine, they also had a wrp400,

You actually have only made one call since the 16th so I can only get details for that one.

But the issue will be the router as it is in almost 70% of cases the other 25% will be access conditions with the last 5% being incorrect configs (either us, yes we do make mistakes or the end user I'm looking at you Asterisk Guys

), VFX itself runs exactly the same way for all subscribers and for audio paths, the system will be sending to the same ports and IPs for the duration of calls this does not change, the issues that do occur like the one you are seeing here will be due to the router.

Basically it comes down to a lot of router manufactures have very poor SIP implementations they understand the Net but not SIP that is why your browsing is unaffected but your Voice was, the router will be blocking the packets for whatever reason then suddenly letting them through again, perhaps it thinks it some sort of attack, firewall kicks in etc

If I look at the call

The part we are intersted in is the Blue highlighted this is the number of Voice packets sent to you from the system in this case 2722, however the device itself reports that it only recieved 2432 and it lost 283, this 283 lost packets is your missing Voice

Compare it to the upload in Red where all packets sent 2728 were recieved going through the same router.

The issue will be the Router Aaron, do you have the latest firmware would be my first ask or perhaps tring a different router if you can manage to get hold of one.

uri	mos	timestamp	packets-passed	packets-dropped	packets-lost	current-jitter	average-latency	packets-duplicate	fraction-lost
Media Type	audio/pcmu
Observed
From:sip:094xxx232@as.wxcnz.net	4.44	20:33:51.316 Mon 2008-07-21	2728	0	0	0.103	0	0	0
session-id:0x08C2FD8682D01893 min-jitter:0.004 max-jitter:0.168 min-TTL:60 max-TTL:60 streamIndex:0 channel:0 min-latency:0 max-latency:0 codecs:PCMU telephone-event X-NSE
From:sip:99xxxx14@as.wxcnz.net	4.43	20:33:51.316 Mon 2008-07-21	2722	0	0	0.272	0	0	0

Timestamp     : 20:33:51.314 2008-07-21
Direction     : RX
Remote IP/Port: 118.90.xxx.xxx
Local IP/Port : 58.28.20.150
Transport     :
----------------------------------------
To: 099xxxx14<sip:99xxxx14@as.wxcnz.net>;tag=dbdb0311b330db6bo0
From: <sip:094xxxx232@as.wxcnz.net>;tag=96141c3a-13c4-488449b3-58c2ee87-2367b717
Call-ID: c1f0e089-xxxxxxxxxxxx
CSeq: 1
Server: Linksys/WRP400-1.00.05
P-RTP-Stat: PS=2728,OS=436480,PR=2432,OR=389120,PL=283,JI=1,LA=0,DU=47,EN=G711u,DE=G711u
Content-Length: 0

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Aaryn015

104 posts

Master Geek

Reply # 150672 23-Jul-2008 15:29

Cool Maverick. Cheers for the in depth breakdown. Makes sense to me.

I don't have another router unfortunately. I do have another Modem (AM300) but it doesn't sound like it's worth trying that. I'm fairly sure that updating the firmware was the first thing I did, but I've been through 2 modems so I may have them mistaken.

I'll check it out tonight and load the latest firmware if it isn't there. Failing that, I'll see about sending it back. It's less than 4 months old.

Cheers
Aaron

Aaryn015

104 posts

Master Geek

Reply # 150674 23-Jul-2008 15:31

FYI Maverick, the problem occurs on calls made to us too. Most of our calls are incoming.

maverick

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Reply # 150678 23-Jul-2008 15:47

Try the AM300 First, that should be fine I was just pointing out that I had seen a similar issue this week on the am300 but in the opposite direction and it was due to the unit being faulty, once again make sure you have the latest firmware am300

,

I just ask everyone to check firmware first now as I got caught out awhile ago, couldn't work out an issue on a someones connection, spent hours and was doing my head in , finally checked the firmware found it was so old as soon as i got them to upgrade problem went away........ once bitten

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maverick

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Reply # 150679 23-Jul-2008 15:50

Aaryn015: FYI Maverick, the problem occurs on calls made to us too. Most of our calls are incoming.

Cheers , that will be the same issue , try the AM300 and will see how we go.

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Aaryn015

104 posts

Master Geek

Reply # 150771 23-Jul-2008 21:20

Hi Maverick,

OK, tried the AM300, but as per the reason for me replacing it with the DLink, it's a pile of junk. It stays connected for around 20 secs, then cuts off. Then repeats. I even tried a fresh install. Can't even get into the interface to set it up.

It was never actually this bad before I had the wiring fixed a few weeks ago. I should probably send that thing back.

So back to where I was.

Firmware for the WRP400 is 1.00.05
Firmware for the DSL-504T is V3.02B01T01.NZ.20071119

From what I can find - both seem current.

maverick

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Reply # 150818 24-Jul-2008 06:21

Argh okay, so the AM300 is actually faulty, I thought you just had it spare floating around,

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Aaryn015

104 posts

Master Geek

Reply # 150854 24-Jul-2008 09:33

Well that's just the thing, so did I!

It wasn't that bad before we had the line issue sorted out. It would just cut out now and then when the line was no good and I would need to reboot everything to reconnect. The DLink renews the router's IP by itself after a dropout. Now that the line is fixed, the AM300 cuts out religously. I could actually time a pattern of connect, 10 seconds, drop, connect, 10 seconds....

Anyway, I suppose sending the Router back is the only option in this case? I might send the AM300 back with it and get a WAG54GP2v2? Trying to figure out what unit is the culprit is a major pain in the ass.

Cheers
Aaron

maverick

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Reply # 150856 24-Jul-2008 09:36

It will be the router, that is my educated guess the wrp400 is a good unit and won't be the problem Aaryn..... I would almost lay my reputation on it (that's if I had one of course

)

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Jekkyl

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Master Geek
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Reply # 150877 24-Jul-2008 10:20

I have the exact same problem. I have a Dynalink RTA 1320 going to a wrp400. Be interesting to know if you manage to get this resolved.

maverick

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Reply # 150887 24-Jul-2008 10:34

Jekkyl: I have the exact same problem. I have a Dynalink RTA 1320 going to a wrp400. Be interesting to know if you manage to get this resolved.

The router here is not passing the packets,you sent in this last 11 minute call 35865 audio packets and we got all of them, we send you 35809 and 4038 of them were lost,

----------------------------------------
Timestamp     : 09:05:33.897 2008-07-24
Direction     : RX
Remote IP/Port: 118.90.xxxx
Local IP/Port : 58.28.xxx.xxx
Transport     :
----------------------------------------
BYE sip:47xxx04@as.wxcnz.net:5060;
Via: SIP/2.0/ 118.90.xxx.xxx;branch=z9hG4bK-78694aff
From: 0944xxx47 ;tag=e4a717d61b49fc3co0
To: ;tag=96141c3a-13c4-48879a2f-65b469e0-31ec358f
User-Agent: Linksys/WRP400-1.00.05
P-RTP-Stat: PS=35865,OS=5738400,PR=31771,OR=5083360,PL=4038,JI=3,LA=0,DU=722,EN=G711u,DE=G711u
Content-Length: 0

uri	mos	timestamp	packets-passed	packets-dropped	packets-lost	current-jitter	average-latency	packets-duplicate	fraction-lost
Media Type	audio/pcmu
Observed
From:sip:47xxx04@as.wxcnz.net	4.44	09:05:55.427 Thu 2008-07-24	35865	0	0	0.098	0	0	0
session-id:0x08C2FE242B89B238 min-jitter:0.004 max-jitter:16,777.328 min-TTL:60 max-TTL:60 streamIndex:0 channel:0 min-latency:0 max-latency:0 codecs:PCMU telephone-event X-NSE
From:sip:944xxx47@as.wxcnz.net	4.43	09:05:55.427 Thu 2008-07-24	35809	0	0	0.272	0	0	0

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Jekkyl

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Master Geek
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Reply # 150893 24-Jul-2008 11:04

So you think this could be a faulty wrp400 as well?. Or could it be the Half bridge mode setup I have?. Was speaking with Nick before he went away he seemed to think I was getting a strange voip port not sure if that somehow relates to anything.

maverick

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Reply # 150896 24-Jul-2008 11:13

No it will actually be the router not passing packets to the WRP400, possibly due to the half bridge mode, the port will be fine as this is not related to the Media path only the Signaling, do you happen to have another router around you could try ?

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Jekkyl

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Master Geek
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Reply # 150910 24-Jul-2008 12:08

You mean the dynalink adsl modem/router not passing packets to the WRP router/voip yea?.

I have another adsl modem/router/voip unit and on the weekend I will have another linksys adsl modem/router I can test with. Not sure which way to set them up thou.

maverick

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Reply # 150913 24-Jul-2008 12:11

Just replace the router you have and plug the wrp400 into that , if it's on DHCP it should be fine,

see how you go with those different routers,

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