6.6 Call Hold/Call Wait

23.1533GPPOut of band transcoder controlRelease 17Stage 2TS

Figure 6.6/1: Configuration during Call Hold/Call Wait scenario

This scenario assumes subscriber C (served by RNC-O”) calls subscriber B (served by RNC-T), currently in communication with subscriber A. Subscriber C receives a tone/announcement, applied by terminating side. Then subscriber B puts subscriber A on Hold and A receives an announcement (applied again by terminating side.)

MGW-O has to establish an originating side call context (T4, T5), MGW-T the respective terminating one (T3 only, T1 from subscriber will be moved to it during the scenario), the B party context has to be inserted into path again (if TBE was removed).

Figure 6.6/2: Call Hold/Call Wait and TrFO. Message flow part 1

Figure 6.6/3: Call Hold/Call Wait and TrFO. Message flow part 2

Figure 6.6/4: Call Hold/Call Wait and TrFO. Message flow part 3

Figure 6.6/5: Call Hold/Call Wait and TrFO. Message flow part 4