Agree there is no generic behavior here. IMO, if there are multiple UAs
registered to the same AOR, then one should be able to call the AOR and
reach the others. If a UA initiates an INVITE and receives that invite
itself, in many cases it should probably reject that, because it is
busy. It can be tricky if the calling UA supports something like call
waiting, because it might alert for the incoming call even though it has
an outgoing call in progress.
Putting your outgoing call on hold in order to handle the incoming call
to yourself would probably not be very satisfying. :-) But luckily that
is probably pretty difficult to do, because its hard to put a outgoing
call on hold before it has answered.
Thanks,
Paul
Alex Balashov wrote:
> Yes, but there's no such thing as generic behavior here; it depends on
> what the UAS side is.
>
> If it's a B2BUA, it'll generate a new dialog and the UA should accept
> the incoming call the same way it accepts any other incoming call.
>
> If it's a proxy, the UA should reject the call because it will have the
> same Call-ID, CSeq, tags, etc. and thus be considered a loop.
>
> tamal.bis...@wipro.com wrote:
>
>> I want to know the generic behaviour.
>> Anyway, we can assume that, the same user bob is registered to the same
>> SIP server from 2 different mobile MOB1 and MOB2.
>> Bobs intention might be to get connected to MOB2 from MOB1.
>>
>> Using MOB1 If bob sends INVITE sip:b...@commondomain. SIP server will
>> fork the invite to both the mobile.
>>
>> What is the expected behaviour for bob when the invite reaches to MOB1.
>> Should bob be able to establish the call? Should it send 200 OK, CANCEL
>> or any error response or just simply ignore the
>> INVITE.
>>
>>
>> Thanks & Regards
>> Tamal Tanu Biswas
>> Email: tamal.bis...@wipro.com
>> Cell: 9880757970
>>
>> Arise! Awake! and stop not till the goal is reached.
>> -Swami Vivekananda
>>
>> -----Original Message-----
>> From: Alex Balashov [mailto:abalas...@evaristesys.com]
>> Sent: Friday, December 12, 2008 11:56 AM
>> To: Tamal Tanu biswas (WT01 - Product Engineering Services)
>> Cc: sip-implementors@lists.cs.columbia.edu
>> Subject: Re: [Sip-implementors] Calling Self
>>
>> That depends on to whom / what the caller sends the request. Where is
>> it going?
>>
>> tamal.bis...@wipro.com wrote:
>>
>>>
>>> What is the expected behaviour is a user calls himself ?
>>> Should the called handle the Invite and call should get established Or
>>> cancel should be send or else some error response can be set.
>>>
>>> Thanks & Regards
>>> Tamal Tanu Biswas
>>>
>>>
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>> Alex Balashov
>> Evariste Systems
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