[WXC/VFX] WxC VoIP blocked by XT Network

Forums › One New Zealand (including Vodafone, WxC, Farmside) › [WXC/VFX] WxC VoIP blocked by XT Network

ALARMNZ

88 posts

Master Geek
Inactive user

#67094 27-Aug-2010 18:49

After a set of gruelling tests ( late August 2010) I can confirm Telecom is stopping VoIP traffic for WxC via its XT mobile network.

I have proven the wireless router is not at fault, as I swapped to the vodafone network and it worked fine.

So please let me know why this is so because WxC is not a fault.

cokemaster

Exited
4930 posts

Uber Geek

Retired Mod

Trusted

Lifetime subscriber

#373722 27-Aug-2010 19:38

Is that using internet.telecom.co.nz or direct.telecom.co.nz ?

webhosting

Loose lips may sink ships - Be smart - Don't post internal/commercially sensitive or confidential information!

freitasm

BDFL - Memuneh
79320 posts

Uber Geek

Administrator

ID Verified

Trusted

Geekzone

Lifetime subscriber

#373723 27-Aug-2010 19:38

I have a Cisco router with 3G fall back and I had no problems using my VFX line while the modem was on XT.

sbiddle

30853 posts

Uber Geek

Retired Mod

Trusted

Biddle Corp

Lifetime subscriber

#373856 28-Aug-2010 09:33

I have no issues using VoIP on XT.

ALARMNZ

88 posts

Master Geek
Inactive user

#373914 28-Aug-2010 12:50

freitasm/Sbiddle/cokemaster

Ok thanks thats very encouraging, will try some other devices perhaps next week.

Hmmmmm modem settings may be at fault....

maverick

3594 posts

Uber Geek

Trusted

WorldxChange

#373932 28-Aug-2010 14:28

Just grabbed a pre paid XT sim this morning for my IPad to Test, had a few calls going to and from it with no issues, messaging is all good.

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well

https://www.facebook.com/wxccommunications

coffeebaron

6236 posts

Uber Geek

Trusted

Lifetime subscriber

#373946 28-Aug-2010 15:34

I had a play with a 3G router over XT + VFX a while back. This had issues with running a standard VFX provisioned ATA and certain phone calls.
Basically a few seconds into the call, the call would drop out. This seemed to affect calls that were answered virtually straight away - e.g. 0800 calls to an IVR.
When 3G steps up from idle to full go, there is a delay and usually packet lose. The SIP message acknowledging the call did not get through, therefore it got dropped from the WxC side a few seconds into the call.
Calls that had a bit more ring time, seemed to work OK.

Using the same type of 3G router in Vodafone variant, there was no issue.

Rural IT and Broadband support.

Broadband troubleshooting and master filter installs.
Starlink installer - one month free: https://www.starlink.com/?referral=RC-32845-88860-71
Wi-Fi and networking
Cel-Fi supply and installer - boost your mobile phone coverage legally

Need help in Auckland, Waikato or BoP? Click my email button, or email me direct: [my user name] at geekzonemail dot com

coffeebaron

6236 posts

Uber Geek

Trusted

Lifetime subscriber

#373947 28-Aug-2010 15:36

maverick: Just grabbed a pre paid XT sim this morning for my IPad to Test, had a few calls going to and from it with no issues, messaging is all good.

Can you try a call to 0800 000 000 and see if that works ok? Make sure the iPad is completely (3G) idle at call setup.

Rural IT and Broadband support.

Need help in Auckland, Waikato or BoP? Click my email button, or email me direct: [my user name] at geekzonemail dot com

Quic Broadband

Move to New Zealand's best fibre broadband service (affiliate link). Free setup code: R587125ERQ6VE. Note that to use Quic Broadband you must be comfortable with configuring your own router.

maverick

3594 posts

Uber Geek

Trusted

WorldxChange

#373967 28-Aug-2010 16:31

coffeebaron: I had a play with a 3G router over XT + VFX a while back. This had issues with running a standard VFX provisioned ATA and certain phone calls.
Basically a few seconds into the call, the call would drop out. This seemed to affect calls that were answered virtually straight away - e.g. 0800 calls to an IVR.
When 3G steps up from idle to full go, there is a delay and usually packet lose. The SIP message acknowledging the call did not get through, therefore it got dropped from the WxC side a few seconds into the call.
Calls that had a bit more ring time, seemed to work OK.

Using the same type of 3G router in Vodafone variant, there was no issue.

Thanks Fraser, your describing exactly the symptoms AlarmNZ is seeing, the call is answered but the 200 ok does not get through to the far end, the reason the call drops is that there is no ack from the end point so the sip timer from the network drops the call at about 10 secs, my discussions with the AlarmNZ guys is that the unit is not passing the packets, the issue with power up is interesting as well but is part of the issue as the 200 ok is sent multiple times over about 8 secs.

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well

https://www.facebook.com/wxccommunications

maverick

3594 posts

Uber Geek

Trusted

WorldxChange

#373971 28-Aug-2010 16:44

coffeebaron:
maverick: Just grabbed a pre paid XT sim this morning for my IPad to Test, had a few calls going to and from it with no issues, messaging is all good.

Can you try a call to 0800 000 000 and see if that works ok? Make sure the iPad is completely (3G) idle at call setup.

Yes can reproduce the issue, it's the same issue as you and alarmNZ have seen, as you suggest I would tend to agree with you, I am guessing this is probably a technical limitation with XT since it can be reproduced across multiple connection types, I guess this is a plus for Vodafone and a negative for Telecom.

Obviously VoIp is not supported and "illegal" in their t&c's , but I will see who I can talk to about the actual performance as they them selves would want it to as good as possible.

Thanks for the info Fraser this was very useful and accurate, Neville this is exactly the issue your seeing, I'm guessing Vodafone will have toe your failover options.

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well

https://www.facebook.com/wxccommunications

coffeebaron

6236 posts

Uber Geek

Trusted

Lifetime subscriber

#374031 28-Aug-2010 20:43

A while ago (I think) there was talk or some tests of VFX using TCP, rather than UDP for traffic, or at least SIP signaling. Did this idea ever come to anything?
Would be interesting to try.

Rural IT and Broadband support.

Need help in Auckland, Waikato or BoP? Click my email button, or email me direct: [my user name] at geekzonemail dot com

maverick

3594 posts

Uber Geek

Trusted

WorldxChange

#374041 28-Aug-2010 21:25

coffeebaron: A while ago (I think) there was talk or some tests of VFX using TCP, rather than UDP for traffic, or at least SIPI signaling. Did this idea ever come to anything?
Would be interesting to try.

TCP has always been supported Fraser :)

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well

https://www.facebook.com/wxccommunications

maverick

3594 posts

Uber Geek

Trusted

WorldxChange

#374653 31-Aug-2010 07:22

TCP makes no difference Fraser, appears to be a bit of a bug with XT ..

Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well

https://www.facebook.com/wxccommunications

ALARMNZ

88 posts

Master Geek
Inactive user

#374660 31-Aug-2010 08:03

I looked at this again and yes if the call is answered too quickly the call drops, while if its allowed to ring a couple of times all is OK.

Perhaps it could be something to do with the CID hand off ?

sbiddle

30853 posts

Uber Geek

Retired Mod

Trusted

Biddle Corp

Lifetime subscriber

#374662 31-Aug-2010 08:07

ALARMNZ: I looked at this again and yes if the call is answered too quickly the call drops, while if its allowed to ring a couple of times all is OK.

Perhaps it could be something to do with the CID hand off ?

Nothing to do with CID, it looks like it's packet loss occuring during state transitions as the connection goes from 3G to HSDPA. because VoIP uses UDP rather than TCP no retransmission occurs.

coffeebaron

6236 posts

Uber Geek

Trusted

Lifetime subscriber

#374736 31-Aug-2010 10:16

Try the call again, but this time with a file downloding in the background - i.e. so that the 3G connection cannot drop to idle.
Would be interested to see what result that gives, as my theory is it is an issue during 3G idle to full go.

Rural IT and Broadband support.

Need help in Auckland, Waikato or BoP? Click my email button, or email me direct: [my user name] at geekzonemail dot com