> In my opinion, if only a SIP network is involved and > no gateways are used, overlap signalling (e.g., the > caller sends dialed digits to an outbound proxy in > consecutive separate INVITEs for the outbound proxy > to collect enough information and route the requests) > is meaningless, because there are no physical connections > to be established, am I right?
It isn't meaningless; it wastes network resources and the devices would need to agree upon what should occur (i.e. how the digits are collected, et cetera). Even though draft-ietf-bliss-shared-appearances provides a PUBLISH mechanism for seizing an appearance, some vendors might also allow an INVITE/484/ACK exchange to temporarily keep an appearance seized. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
