Hi Jhun,
To answer your question briefly the following two sections of the 'show call active voice brief' provide information regarding echo and QOS:
noise:-52 acom:45 i/0:-51/-16 dBm
-NoiseLevel=-59
The active noise level for this call.
This value is calculated in the comfort
noise generation module and is used
to generate comfort noise when voice
activity detection (VAD) is enabled.
-ACOMLevel=45
The current ACOM level for this call.
ACOM is the combined loss achieved
by the echo canceler. This value is the
sum of the Echo Return Loss (ERL),
Echo Return Loss Enhancement
(ERLE), and Non-Linear Processing
(NLP) loss for the call.
pl:146400/0ms lost:0/1/0 delay:55/55/85ms
-HiWaterPlayoutDelay=55ms
The First-In, First-Out (FIFO) jitter
buffer high mark that indicates the
maximum depth to which the de-jitter
buffer adapts for this call.
-LoWaterPlayoutDelay=55ms
The FIFO jitter buffer low mark that
indicates the minimum depth to which
the de-jitter buffer adapts for this call.
-ReceiveDelay=85 ms
The current playout FIFO delay plus
the decoder delay for the call.
The following output tells us that there was a codec negotiation using g711ulaw:
g711ulaw TextRelay: off
Codec negotiation occurs after call setup and alerting states, so most likely the terminating device is off hook.
-be advised that the show call active voice brief only displays active calls, so most likely this is not a dropped call.
I hope this answers your question
cheers
Edson
