[Serusers] SIP call hold/unhold

[samuel]

UA is not SIP compliant. It must include the SDP in the OK.

Samuel.

2005/12/14, tcchan <tikchoong.chan at redtone.com>:
> Dear All,
>
> I encountered a UA that behave as follow:
>
> UA1 call UA2
>
> UA1 ---- invite with SDP -----> UA2
>
> UA1 <------OK with SDP --------UA2
>
>
> UA1 hold the call,
>
> UA1 ------invite (hold)  ------>UA2
> UA1 <--------OK but not SDP ---UA2
>
>
> UA1 unhold the call
>
> UA1 ------invite ----------->UA2
> UA1 <-------OK but also no SDP---UA2
>
>
>
> I found that most ATA(UA) would attached a SDP when reply an OK whether
> the call is hold or unhold.  But there is one ATA that does not (UA2).
>
>
> I noticed that some ATA--Linksys (UA1) would send a BYE to UA2 if it
> receive a OK with no SDP in the hold case.
>
> My Question is :
>
> Is UA2 behave according to RFC?
>
>
>
> Would deeply appreciate if someone could let me know the answer as I
> always have trouble reading RFCs...
>
>
> Thanks fot any help available.
>
> Regards,
>
> TC Chan
>
>
>
>
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