Tandem Switching

we are getting intermittent dropped calls and 1-way audio…

Does anyone have this setup:

PRI -> 1 port Digium Asterisk -> IAX2 -> 1 port Digium Asterisk -> PRI To a Toshiba PBX

???

Every so often users on the Toshiba PBX get 1-way audio and dropped calls.

PLEASE HELP alohatone@gmail.com