[Freeswitch-users] FreeSWITCH and Sangoma - Robbed Bit Channel Associated Signaling (CAS)

Are there any tricks to getting Robbed Bit Channel Associated Signaling (CAS) working properly with FS (legacy 1.06 nor latest git seem to show desired results) and Sangoma boards. I am using model A102, REV 1.1. DTMF does not seem to be recognized in the call stream so IVR does not respond. SIP calls work fine. Brian C. Edgar, Jr.