We have a customer site with the following setup:
Mitel TA7102 ATA(fax)> Registers to Mitel MiVB MXE3> SIP trunks through Mitel MBG.
The site has 2 ATA's for fax machines. If you call inbound to the ATA's, you get fax tones. Both of the fax machines can talk to each other via the DID numbers. But if you try to fax outbound to anywhere, the machine gets a busy signal.
All the phones can make and receive calls no problem. I can't find any settings for T38 other than the ATA and the COS in the MiVB. does any one have any ideas?