[cisco-voip] avaya s8300 with callmanager over h.323

[Lukas Drbohlav]

hello,

i would like to connect our new avaya s8300 with cisco callmanager over 
h.323. 
my situation is when i make a call to callmanager, user pick up phone but 
without
voice, connection is still up to user hang cisco phone.
when i make call from cisco phone, situation is same, connection is stable 
but without voice.
we use G.711 codec.

do you have any experience with my problem ?

thank you

regards

lukas drbohlav