[asterisk-users] Asterisk and 802.11g

Yuan LIU yliu11 at hotmail.com
Thu Feb 8 01:36:38 MST 2007


I'm greatly surprised when testing an Asterisk box with 802.11g.  Here's the 
topology:

VoIP caller --- 802.11g --- Asterisk --- 802.11g --- VoIP extension
                                       |
                                     FXO ___ PSTN extension

When I call a VoIP extension on that box (from a VoIP extension), voice is 
good.  But when this box tries to bridge the call with a PSTN extension, 
voice is completely broken.  And it's not because of the cheap X100P - when 
I ping the box, round trip is >4,000 ms, most of the time causing timeout.  
Once the call hangs up, ping time dropped to 1-2 ms.  Ping time started to 
surge even when FXO is simply ringing.

If VoIP to VoIP extension call uses re-invite (which it did), voice is also 
good in the Console channel.

How can voice traffic stall 802.11g? (I haven't checked, but CODEC is likely 
ulaw.)

Yuan Liu




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