Carlos Chavez wrote:
On 4/5/16 3:17 PM, Joshua Colp wrote:
Carlos Chavez wrote:
I am currently having a voice quality problem with one of our Asterisk
servers. We have checked the network and we have found no problems that
could cause the voice to sound cracked and with small interruptions. I
am looking at the timing source for Asterisk and it is currently using
timerfd even though we have an E1 card installed. Is timerfd better than
dahdi? Any recommendations to test if timing may be a problem for voice
quality and DTMF?
What is the scenario and the channels involved? Timing is only used
for things such as playback, music on hold, and ConfBridge. If it's
strictly a two party call then Asterisk forwards media as received.
The problem appears on all calls, no matter the source or destination.
There are desk phones, softphones and a couple SIP trunks to another
office. They all experience the problem. Calls between extensions, from
or to the E1, from or to trunks. The only scenario left to try is
connecting calls only via the E1 so we completely eliminate the network
side of things and se if we get the same behaviour. During calls you can
hear some background noice and interruptions in the voice. DTMF fails
when we try to dial to external IVR.
I do not really believe that the fault is in the Asterisk server but I
have to eliminate all posibilities on my side before I can lay blame on
the network infrastructure. I was also just wondering if DAHDI would not
be a better timing source for Asterisk since it is hardware based?
Either timerfd or dahdi should perform the same. I wouldn't expect dahdi
to improve things unless something was really wrong on the system itself.
--
Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org
--
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