I have an Mitel with 3300 ICP Call Control version; I have an DSU cabinet with PRI card installed. This PRI card is connected with an Alcatel PABX 4400 PRI card, both with qsig protocol.
When I make a call from Mitel to Alcatel the call is established but after 5 seconds it breaks; from Alcatel to Mitel everything is Ok.
Thanks !!