Hi,
I've got an * box with 4 E1 (TE405P) and a Class 4 Cirpack switch
(www.cirpack.com).
<IP Network>--<*>--<Cirpack>--<Public PSTN Network>
ISDN interco is EuroIsdn, ports are configured ccs, hdb3, crc4. Cirpack
is Network, * is Terminal/User.
As I encountered some pb with Sip to Zap transcoding (* to Cirpack way
poor quality, the other way fine), I tryed to put a loop on * in order
to make a 100 % TDM call and qualify only the ISDN side.
in zapata.conf, echocancel is on, echocancelwhenbridge is off.
A=calling one
B=called one
both are PSTN terminals
1) Incoming call on my Cirpack from PSTN.
2) Routing to *
3) On *, routing back to Cirpack.
4) On Cirpack, routing to PSTN.
=> Quality B to A is perfect.
Quality A to B is very poor, crackling sound, a strong crackling echo.
I am observing the same effect when performing a Sip-to-Zap call. That's
a one way problem.
If you have any idea, or tweak settings which could help, you're welcome.
thieumS
* 1.0.5
zaptel 1.0.4
