Free Cisco 300-810 Actual Exam Questions - Question 14 Discussion
A company deployed the Cisco Webex calling with Cisco Unified Border Element as a local gateway
for PSTN calls and a firewall to restrict and control the HTTP-based traffic that leaves and enters the
network. However, Alice in LA cannot dial 82024001 to reach Charlie in NY. Which action must an
administrator take to resolve the issue?
It’s B, since SIP signaling uses TCP 5062 which must be allowed outbound.
B Opening TCP port 5062 outbound on the firewall is key because CUBE mostly uses TCP for SIP signaling, not UDP. Without that port open, calls won’t get through the firewall, blocking dialing like Alice’s situation. The UDP ports usually handle media streams, but if signaling can’t pass, the call can’t even start, so opening TCP 5062 is the right move here.
D vs B? UDP 8934 is for media, opening it might fix call setup issues.
This one’s tricky, but since Cisco Unified Border Element uses TCP for signaling typically, opening TCP port 5062 outbound (option B) should fix the dialing issue. UDP 5062 (A) is less likely because signaling usually relies on TCP, not UDP, so firewall blocking TCP 5062 is probably causing the problem.
Looks like the issue is with the signaling port, so gotta go with A.