Appendix
357
The following figure illustrates a successful call between Yealink SIP IP phones in which
two parties are in a call and then one of the parties transfers the call to a third party
without consulting the third party. This is called a blind transfer. In this call flow scenario,
the end users are User A, User B, and User C. They are all using Yealink SIP IP phones,
which are connected via an IP network.
The call flow scenario is as follows:
1. User A calls User B.
2. User B answers the call.
3. User B transfers the call to User C.
4. User C answers the call.
Call is established between User A and User C.
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