Refer to the exhibit and configuration output.
A user in New York (5001) is trying to call a user in London (6001), but the call cannot be completed. Assuming that the WAN uplink is failing and the voice traffic has to go out toward the PSTN, which command do you need to add to dial peer to solve this issue?
dial-peer voice 3 pots
destination-pattern 6…
preference 1
port 0/0/0:23
dtmf-relay sip-notify
A. num-exp 512602 6001
B. prefix 757385
C. forward-digits 2
D. forward-digits 4
E. prefix 5126
Answer B must be; prefix 7573856
when a user dials the number 6001, the original digit 6 is stripped by the default POTS dial-peer digit stripping behavior, leading to only 3 digits being sent to PSTN.
This is where a prefix command comes in and 7573856 is prefixed to the remaining number thereby sending 7573856001 as outgoing number to PSTN switch.
Correct answer is B
with the command Prefix the final string that will be forward to the PSTN is :
prefix 757385+6001 = 7573856001
B is not correct either. The correct command would be ‘prefix 7573856’ as digit 6 in ‘destination-pattern 6…’ is stripped due to POTS’ default stripping behavior.