We have Asterisk-1.2.10 and Zaptel-1.2.7
1.) The System is running with FreeTDS and UnixODBC for SybaseASE
Connectivity thru PhpAGI
TE110P, Rhino Channel Bank w/ 8 FXO and 16 FXS and some analog phones
Atcom320=4, BT200=10, GXP2000=1 and Polycom501=1
Panasonic Hybrid PABX
The callers can call from PSTN and access their data in SybaseASE with no problem…the headache exist when analog phones connect to i phones
and vice versa.
after knowig the cause of echo which is the “imbalance” of endpoints as Analog phones<-----Hybrid------->ip phones i tried to tweak zapata.conf
giving this values
i remove 90% of echo which is quite acceptable. but when i call out from polycom501 to TELCO (ananlog phones) the called person doesnt hear me but i hear the callee answering my calls and say hello… hello… helloooo. Poycom501 has no echo issue ever since it is put in the * system. only when i solve the other ip phones.
as i tweak the zapata.conf and changes the values everynow and then to solve the echo.
There are times that rfc2833 in polycom501 did not function, this will occur when the person called did not hear
its so ironic that when you troubleshoot and success. but in exchange as you go to another phone it will no work anymore.
could you please advice me what is the best echo canceller for this mix ip phones.
is there a asterisk hardware echo cancaller?
3)i dont like to use AGRESSIVE_CANCELLER as some said it will convert my TE110P into half duplex as in (over and out …roger roger… go ahaed)