[SIPForum-discussion] Can any SIP session have zero or no participant???

[Nirmal Patel]

Hi,

Can any SIP session have zero or no participant???
I came to know that ------

SIP-initiated sessions can have no or just one participant. Examples of a
session with no participants include an invitation to a multicast group with
no members (beyond the invited party). Also, SDP sessions can start at a
future time relative to the invitation.

So can anyone pls tell me ------

1.How come a multicast group possible without a member?And if there is no
member then how come the session is possible???

2.What is the case where only one participant is present and how???


Regards
Nirmal
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