D/240SC-T1 support all these 4 types:
IDA-P = ISDN PRI on T1 (ITU-T standard), using 4ESS protocol
IDA-M = DTMF on T1 (can use US CAS Global Call or direct DTMF+A/B bit programming)
IDA-R = R1 tones on T1 (rarely available now)
IDA-C = ITU C7(SS7) on T1 (D/240SC-T1 be the bearer circuit, and SIU/PCCS6 as signalling GW)
The card had been approved for IDA-P and IDA-M, while have references for IDA-C with DK's products.
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