12,290
edits
SIP Audio Problems: Difference between revisions
m
→Brief overview
(→Advanced troubleshooting: it's not markdown ;)) |
m (→Brief overview) |
||
| (5 intermediate revisions by 2 users not shown) | |||
|
! Type !! Typical Cause !! Typical fix
|-
| '''No audio''' || On mute, handset loose cable?! Firewall/NAT blocking traffic || Investigate firewall/NAT/ALG
|-
| '''Short silent gaps''' || Packet loss || Check internet quality
| '''No audio after a few minutes''' || Firewall/NAT/session timeouts || Investigate firewall/NAT/ALG
|}
* Calling *100 will play a continuous 1Khz tone - if the audio breaks up then there is a problem
= Checklist: =
== NAT ==
If your phones are are on a 192.168.x.x or 10.x.x.x IP address then they will be behind a NAT router. Our [[VoIP NAT|VoIP and NAT]] page has information and tips if your phones are behind a NAT router and you have problems.
== Things to figure out ==
== Things to investigate ==
* Check the quality of the internet connection
* Calling *100 will play a continuous 1Khz tone - if the audio breaks up then there is a problem
* Check the CQM graph (if using A&A for the internet connection)
* Check for other traffic on the internet connection - spikes in traffic can affect audio
* (if non-A&A internet) Try a different Internet connection, including using a different ISP
* Try non-NAT
*
* If it's only the incoming audio that is broken, look for the jitter buffer setting on the SIP device and increase it bit by bit.
| |||