User Manual

Yealink Skype for Business HD IP Phones Administrator Guide
xxii
SIP Request ............................................................................................................................ 389
SIP Header ............................................................................................................................ 390
SIP Responses ....................................................................................................................... 391
SIP Session Description Protocol (SDP) Usage .................................................................. 394
Appendix E: SIP Call Flows ......................................................................................................... 394
Successful Call Setup and Disconnect ............................................................................... 394
Unsuccessful Call Setup—Called User is Busy .................................................................. 397
Unsuccessful Call Setup—Called User Does Not Answer ................................................ 399
Successful Call Setup and Call Hold .................................................................................. 401
Successful Call Setup and Call Waiting ............................................................................. 404
Call Transfer without Consultation ...................................................................................... 408
Call Transfer with Consultation ............................................................................................ 411
Call Conference .................................................................................................................... 416
Index ......................................................................................421