Which is the Cisco recommended maximum jitter value of voice traffic over the network?

Which is the Cisco recommended maximum jitter value of voice traffic over the network?
A . 50 ms
B . 60 ms
C . 40 ms
D . 30 ms

View Answer

Answer: D

Explanation:

Voice calls, either one-to-one or on a conference connection capability, require the following:

– 150 ms of one-way latency from mouth to ear (per the ITU G.114 standard)

– 30 ms jitter

– 1 percent packet loss

17 to 106 kbps of guaranteed priority bandwidth per call (depending on the sampling rate, codec, and Layer 2 overhead)

150 bps (plus Layer 2 overhead) per phone of guaranteed bandwidth for voice control traffic

Reference: http://www.ciscopress.com/articles/article.asp?p=471096&seqNum=6