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210-065 · Question #20
210-065 Question #20: Real Exam Question with Answer & Explanation
The correct answer is A: H.450.3. H.450.3 is the ITU-T standard specifically defining call forwarding supplementary services for H.323-based systems.
Question
Which standard will support call forwarding?
Options
- AH.450.3
- BH.323
- CRFC 2833
- DH.450.2
Explanation
H.450.3 is the ITU-T standard specifically defining call forwarding supplementary services for H.323-based systems.
Common mistakes.
- B. H.323 is the overarching umbrella standard for multimedia communications over packet networks; it defines the framework but does not itself specify call forwarding - that is delegated to the H.450.x supplementary service series.
- C. RFC 2833 defines the transport of DTMF and other telephony tones as named telephony events over RTP, which has no relation to call forwarding signaling.
- D. H.450.2 defines call transfer supplementary services (moving an established call to a third party), not call forwarding - the two are distinct operations with different H.450.x designations.
Concept tested. H.450.3 call forwarding supplementary services standard
Reference. https://www.itu.int/rec/T-REC-H.450.3/en
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