SIP / VOIP phones no longer work

[Rev+Mark]

Please, please can someone help.

I have gigafast FTTP and in addition to my sky phone number which is used for business I have successfully been using other VOIP phones connected to my router for years.

Just in these last few weeks these phones have failed to register HOWEVER my voip provider say that their systems have not changed and there are NO outages. Please, what on earth is happening?

[Chrisee]

@Rev+Mark what VOIP system do you use and are you using the standard SR203 the black Sky Broadband hub? If you havecthat hub have you madecany changes to the set up?

[Rev+Mark]

Hey thanks for being so attentive!

I have regular sky router.... just moved to new home about 8 months ago, so I presume latest model.

My sip accounts are registered with IRISHVOIP and I have a number of suitable phones but have most recently been using GIGASET and YEALINK

[mae-3]

@Rev+Mark 

One thing to try is switching off the router for about an hour to acquire a new public IP address, this may stop the block to the VoIP service provider.

[heywoodh]

Did you ever get to the bottom of this ?

I have exactly the same problem with som SNOM phones connected to VoipFone. It started overnight last Thursday, fine at 5 pm on Thursday, dead 9am on Friday. Taken them to a friend's house over the weekend and they work fine when plugged in to Plus Net.  Sky support say "that's beyond my level of knowledge".

A bit of a problem given I work from home full time

[TimmyBGood]

@heywoodh 

White or black Sky Hub?

[heywoodh]

It's a white one, with no option to enable/disable sip alg.

I have just spoke to someone in sky support again, who seemed a bit more knowledgable. It's now been escalated.

[TimmyBGood]

@heywoodh 

OK: important to make the distinction because the white Max Hub is doing things on its external connection rather differently to all previous models.

https://www.ispreview.co.uk/index.php/2024/06/isp-sky-broadband-uk-deploying-ip-address-sharing-via-... 

[heywoodh]

Thank you very much, that's an interesting read.

I only had fibre to premises installed about a month ago, before that I was on sky fibre to cabinet. So it's possible/probable I was on a non shared IP when first installed and Sky moved me onto MAP-T overnight last Thursday because they like to do things in stages - A sensible approach. This has created some lets say incompatibilities with my phone provider.   I'd hazard a guess the support tech I've just spoken to noticed the Map-T implementation and has requested I'm put back to normal. He did say it will be fixed remotely in 24-72 hours.

I'll let you know what happens over the next few days, but thanks again. 

[Jonny321]

Was this solved? If so how? 

I have the exact same issue with my White Sky Max Hub

[TimmyBGood]

@Jonny321 

Sky requests that you fill in the form linked from the pinned post at the top of this forum (the title refers to VPN use, but it's almost certainly a related issue for VoIP phones)

[Jonny321]

Thanks for the quick response. However, I can't see the pinned post with the link at the top of the forum

[Jonny321]

@TimmyBGood 

Ah I think I've found it. This Form? https://www.sky.com/help/forms/vpn-configuration 

[Jonny321]

@TimmyBGood 

Would it be this form? https://www.sky.com/help/forms/vpn-configuration 

I have noticed a couple or posts similar to this one. Is there currently no resolution for this?

Is there a setting somewhere where I can disable SIP ALG? I looks like it was available in the past with the old hubs.

[FLC]

@Jonny321 

https://helpforum.sky.com/t5/Broadband/Having-problems-with-a-3rd-party-VPN-and-have-a-Hub-6/td-p/48...