What is the cause of this issue?

exams 300-815 V1 300-815 exam 0 Comments

A user in location X dials an extension at location Y. The call travels through a QoS-enabled WAN network, but the user experiences choppy or clipped audio.

What is the cause of this issue?
A . missing Call Admission Control
B . codec mismatch
C . ptime mismatch
D . phone class of service issue

Answer: A