Multiple SIP handsets, one extension?

Have been unable to get a conclusive answer on this:

  • Can/how does Asterisk support multiple handsets registering as the same extension (preferably SIP)?

e.g. Would like to have a handset say at home that is configured the same as my extension at work - that way I can work from home or at the office and both handsets operate identically/transparantly (much like what Free World Dialup provides) …

Thanks gang,

I would just setup a new extension and forward calls…

It can’t.

The only ‘exception’ to this are the cisco 7940/7960 phones, they have multiple lines, but when you enter ‘the same’ sip configuration for more then 1 line, it only registers once (1!) with asterisk. I think you’re better of looking into call roll-over of ring-groups…

could you just set up a ring group instead?

Have each phone use a seperate registration and then ring both phones with something like this:

exten => 1,1,Dial(SIP/phone1&SIP/phone2,15)
exten => 1,2,Voicemail(u1)
exten => 1,3,Hangup