Refer to the exhibit.
An engineer is troubleshooting an issue with the caller not hearing a PSTN announcement before the SIP call has completed setup. How must the engineer resolve this issue using the reliable provisional response of the SIP?
A. voice service voip sip no rel1xx
B. sip-ua disable-early-media 180
C. voice service voip sip rel1xx require 100rel
D. voice service voip sip send 180 sdp
