A company's employees have been complaining that they have been unable to select options on the internal IVR of the help desk IT support has been given Cisco UCM traces and below is the snippet of the SDP of the INVITE packet.

How is this issue resolved?
Suggested Answer: D
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8 comments · newest first
MI
Millie
12 months ago
Really? I thought KPML was the standard for DTMF now.
CA
Caren
12 months ago
I’ve seen it work with G.722 too, so not sure about that.
AR
Artie
1 year ago
Wait, isn’t G.729 also a common codec for this?
RI
Rikki
1 year ago
Totally agree, that’s usually the fix for IVR issues!
SI
Sina
1 year ago
I think configuring DTMF for RFC 2833 is the way to go.
NO
Noelia
1 year ago
I feel pretty confident about this one. The exhibit clearly shows the redundant route reflector setup, so I just need to match that to the correct configuration option.
AU
Audra
1 year ago
Based on the information given, I think the best approach is to look at the MSTI 1 details in the diagram. Since the switch is labeled as the root switch, that suggests it is the root switch for MSTI 1. So I'm going to go with option B, "Root switch".
JA
Jamie
1 year ago
I'm a little unsure about this one. The wording is a bit tricky, and I want to make sure I understand all the nuances before selecting an answer.