Hello,
I have a problem with the quality over dsl
I have two offices.
In one office is asterisk with two phones (lets say office1)
In the other office are 4 phones (office2)
The two offices are connected with vpn over dsl with
zyxel 660 routers
Zyxel has a generic VOIP-SIP “QoS” which seems to work somehow and i have installed an experimental g729 codec.
when i have 2 phone calls between office1 and office2 it works fine
when i try for a third call between two phones both of them in office2 the voice has lot of interrupts and not good quality while the other 2 phone calls still work fine (no quality problems)
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On the third phone call the rtp packets suppose to be peer2peer between two phones (LAN), so why the interrupts and bad quality between 2 phones on the same LAN?
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in case “nat=yes” for the client do the rtp packets go through the asterisk server?
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the dsl lines are not used for other porposes. Are zyxel router strong enough to handle RTP packets? (cpu is not over 15% as it shows). Is it possible that the switches cannot handle the rtp packets on the lan?(!)
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any hints what causes the problem or how i fix it?
Thank you
George