Howto:How to read the call screen

How to analyse /interpret call values in the log / trace / PBX -> calls

Applies To

This information applies to

all builds

Reading the call screen values of delay, jitter and packet loss isn’t self explaining.

In the trace and in the log you can see the following:

G729AB,60(0,0)

Codec, packet size (delay in ms, jitter in pieces) it is shown two times for in and out traffic.

In the pbx under call it looks like that:

G729AB (30,7,241)

Codec (delay in ms, jitter in pieces, packet lost in pieces) it is shown two times for in and out traffic

You must distinguish between in-house (switched net) and WAN, furthermore the values are related to each other.

The following values are "normal" limits, but it is also possible that you have a rather good call quality with values which are ("much") higher.

It is up to the administrator to interpret this values in the context.

For example if you lose 20 packets in a two minute call, it is much more bad then losing 20 packets in a 2 hour call.

in-house connections:

(<5/0-9/-)

WAN connections:

(150/16-25/<10)