SIP re registration times

Are there any rules about SIP re registration times? I have seen two
or three minutes from some and an hour from others. Just wondering.

--
Regards
Dave Saville

NB Remove nospam. for good email address

Dave Saville wrote:
> Are there any rules about SIP re registration times? I have seen two
> or three minutes from some and an hour from others. Just wondering.
>

In general, longer is better. I usually go for an hour.

Basically, the longer the registration is valid for, then the more time
you attempt re-registration should the first attempt at re-registration
fail.



Lots of people suggest really fast ones (like a minute) to hold NATs
open. This is not best practice; keep alives are much better for this.

That is my quick explanation, but I'm really busy today.

Tim

On Thu, 31 Jan 2008 12:45:53 +0000, Tim <nutnews@kooky.org> wrote:

>Lots of people suggest really fast ones (like a minute) to hold NATs
>open. This is not best practice; keep alives are much better for this.

On my voip.co.uk account, the server seems to override whatever
setting I make in my PAP2. It seems to set the registration interval
to 120 seconds. I'm not sure if I can alter this.

Tesco Internet Phone seems even shorter with a registration interval
of 45 seconds.

For both of these accounts I have my 'register expirse' setting on the
PAP2 at 3600 seconds but it seems to be overridden. Prior to the new
voip.co.uk platform my setting was not overridden.

"Al Paca" <Al-Paca@lostsomewhereinperu.com> wrote in message
news:fdh3q315glht2ddt2b8dklsipa4o0h03qg@news.indiv idual.de...
> On Thu, 31 Jan 2008 12:45:53 +0000, Tim <nutnews@kooky.org> wrote:
>
>>Lots of people suggest really fast ones (like a minute) to hold NATs
>>open. This is not best practice; keep alives are much better for this.
>
> On my voip.co.uk account, the server seems to override whatever
> setting I make in my PAP2. It seems to set the registration interval
> to 120 seconds. I'm not sure if I can alter this.
>
> Tesco Internet Phone seems even shorter with a registration interval
> of 45 seconds.
>
> For both of these accounts I have my 'register expirse' setting on the
> PAP2 at 3600 seconds but it seems to be overridden. Prior to the new
> voip.co.uk platform my setting was not overridden.

Yes, I think the lower of the re-register periods is taken where they are
different, but I could be wrong - the rules could be slightly more complex.

In message <fntfq0$asp$1@aioe.org>
"Herman" <whitehouse.madhousetakemeout@bigfoot.com> wrote:

> "Al Paca" <Al-Paca@lostsomewhereinperu.com> wrote in message
> news:fdh3q315glht2ddt2b8dklsipa4o0h03qg@news.indiv idual.de...
> > On Thu, 31 Jan 2008 12:45:53 +0000, Tim <nutnews@kooky.org> wrote:
> >
> >>Lots of people suggest really fast ones (like a minute) to hold NATs
> >>open. This is not best practice; keep alives are much better for this.
> >
> > On my voip.co.uk account, the server seems to override whatever
> > setting I make in my PAP2. It seems to set the registration interval
> > to 120 seconds. I'm not sure if I can alter this.
> >
> > Tesco Internet Phone seems even shorter with a registration interval
> > of 45 seconds.
> >
> > For both of these accounts I have my 'register expirse' setting on the
> > PAP2 at 3600 seconds but it seems to be overridden. Prior to the new
> > voip.co.uk platform my setting was not overridden.
>
> Yes, I think the lower of the re-register periods is taken where they are
> different, but I could be wrong - the rules could be slightly more complex.

In SIP, the UAC can request what it wants (the most common period
being 3600 seconds, which is mentioned in the RFC), and the UAS can
grant what it likes. The period granted often is shorter than that
requested, e.g. Sipgate grants 600 when I request 3600. It would
be unusual (not certain if it's wrong, though) to grant you more
than you request.

Dave

On Thu, 31 Jan 2008 22:22:09 GMT, Dave Higton
<davehigton@dsl.pipex.com> wrote:

>In SIP, the UAC can request what it wants (the most common period
>being 3600 seconds, which is mentioned in the RFC), and the UAS can
>grant what it likes. The period granted often is shorter than that
>requested, e.g. Sipgate grants 600 when I request 3600. It would
>be unusual (not certain if it's wrong, though) to grant you more
>than you request.

Thanks for the info Dave.