We are running 2 Asterisk boxes (ast-a and ast-b) connecting our 2
offices. We did some voice quality testing as follows:
ast-b calls ast-a externally (ie. over public phone lines), ast-a
forwards the call back to ast-b over IAX. Since ast-b can't access the
public phone network by itself it has to talk to ast-a over IAX to reach
public phone lines that way.
So the external phone-call really looks like this (dialing external
number of ast-a at ast-b):
ast-b [ IAX ] ============> ast-a [ public phone network ]
^ |
| |
--------
Then ast-a transfers call to a different extension at the ast-b location
(over IAX). So we have:
ast-b => [IAX] => ast-a => [ phone network ] => ast-a => [IAX]
=> ast-b
We discovered the following pattern of noise on the line: after about 4
minutes 45 seconds there'll be tiny interruptions in the transmission
for about 4-5 seconds, after that it would be ok for about 1:35 at which
point another 4-5 second disruption occurs. Then it would start all over
again.
Transmission ok for 4:45, disruption, transmission ok for 1:35,
disruption, ...
So that follows a pattern. Any ideas how to find out what exactly is
going on here and which box is tropping/losing packets or if it happens
somewhere in betweeen (hops we can't control)?
Best regards,
Markus