[155476] in North American Network Operators' Group
Re: voip network hopping
daemon@ATHENA.MIT.EDU (Cameron Byrne)
Fri Aug 10 19:55:32 2012
In-Reply-To: <CAH_OBic43ogP--1nBoR=z7L_cqJNyyuOEdDEW_y=CY0-1naz3Q@mail.gmail.com>
Date: Fri, 10 Aug 2012 16:55:02 -0700
From: Cameron Byrne <cb.list6@gmail.com>
To: shawn wilson <ag4ve.us@gmail.com>
Cc: North American Network Operators Group <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Aug 10, 2012 12:19 PM, "shawn wilson" <ag4ve.us@gmail.com> wrote:
>
> i'm curious if there is any spec in the voip protocol suite that
> allows one to maintain a call while changing networks?
>
> what i want to do is setup a softphone on an android phone. however,
> this won't work very well if i can't switch from wifi -> 3g -> wifi (i
> doubt wifi -> wifi is possible because of hardware limitations). my
> alternative is to get asterisk to put the call on hold and play an
> automated message if a reconnection (and unhold) takes >1 second. i
> would expect that ip telephony would allow for some type of hopping
> though, i just don't know what to google for?
>
In IMS this is called session call continuity (scc or vcc) and is defined
by the 3gpp
UMA and GAN do this too, but not for sip.
CB
