Q: 6
An engineer deploys a Cisco Expressway-E server for a customer who wants to utilize all features on
the server. Which feature does the engineer configure on the Expressway-E?
Options
Discussion
Makes sense to pick B here. Mobile and Remote Access really is the standout feature for Expressway-E, not the others.
Option C and E look right. G.729r8 and G.729ar8 both need to be transcoded to G.711 variants since endpoints can't negotiate that directly, which is a classic dspfarm use case. Pretty sure about this but open to correction.
C E
C and E. G.729 variants to G.711 need transcoding, that's classic on Cisco dspfarm setups. Pretty sure those are the right pairs.
C E imo, official guide and Cisco labs both highlight those transcoding pairs a lot.
Saw something similar on a practice exam, it's C and E for the G.729 to G.711 permutations.
C vs B. I was thinking "SIP gateway for PSTN" (C) because Expressway-E sits on the edge and handles SIP stuff, but after checking, looks like C is a common trap. Pretty sure SIP trunking to PSTN isn't a native function here. Wouldn't argue if someone picked C though since that edge/PSTN wording confuses people.
Don't think D applies, G.722 and G.729r8 don't usually need transcoding since they're not typically paired directly in UC setups. The real mismatches are C and E, since G.729 to G.711 transcoding is classic dspfarm territory. Pretty confident here but open if someone spots a nuance I missed.
C and E, seen those exact codec pairings in official study guide plus lots of Cisco lab tasks with dspfarm. Agree?
C/E for sure. G.729r8 and G.729ar8 can't interoperate directly with G.711ulaw or alaw, so transcoding on the dspfarm is needed in those cases. The others can usually negotiate or are less common pairings. Someone correct me if I'm missing a scenario, but this matches what I remember from lab configs.
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