[Asterisk-Users] Multiple Line Appearances

[John Baker]

How were you able to integrate this with asterisk?  Or did you drop
asterisk in favor of ser?

John

On Thu, 2004-01-29 at 12:44, John Todd wrote:
> At 12:20 PM -0500 1/29/04, Jeremy McNamara wrote:
> >MLS Drop for SysAdmin wrote:
> >
> >>Has anyone successfully implemented concurrent appearance of the 
> >>same PBX extension on multiple SIP phones?
> >>
> >>When using Cisco 7960s under call manager, you can have several 
> >>phones with the same line appearance, but the first user to seize a 
> >>line makes it inaccessible to other phones.
> >>
> >>Under SIP operation it seems as though this is not possible, but we 
> >>don't see group ringing definable for SIP extensions.
> >
> >
> >It is my understanding that Cisco didn't bother implementing this 
> >functionality into their SIP firmware. However, as you have 
> >described, this feature does work when using CCM.
> >
> >chan_skinny (and chan_sccp - which btw, will become the same channel 
> >driver soon) will eventually support this feature.
> >
> >If you (anyone?) have any motivation for Theo and myself to make 
> >Asterisk's SCCP support go to the top of our to-do lists, please 
> >contact either one of us off-list.
> >
> >Jeremy McNamara
> 
> The Cisco phones with SIP support this just fine; it's not a problem 
> for the endpoints, it's a problem for the SIP registrar.
> 
> The phones will happily send out the same authentication 
> name/password pair all day long to the server. The server must be 
> smart enough to then map those multiple registrations to a single 
> "number." Asterisk does not support this feature at this time.
> 
> If you want to use this trick, try SER, as I have had multiple 
> devices with the same registration data register against SER.  When 
> an INVITE is passed into the system, all the phones automatically 
> ring and the first pickup gets the call.
> 
> Typically, you'd want to do this type of multi-number mapping back on 
> the server, anyway - it's not a good idea to have multiple endpoints 
> registering with the same auth data, but you can do it if you really, 
> really want - just not with Asterisk.
> 
> JT
> 
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