I have the RAM upgrade on my desk, so no probs there. Site definitely only has 1xISDN30 and no other equipment with E1.
T1/E1 combo card makes sense - AIUI combo has DSP and E1 on it so "combo" sounds like the right name, as DSP is also mentioned in the card description.
-> sysGetPlatformFamily
value = 64 = 0x40 = '@'
->
so is a CX according to the linked forum post. Was also able to use ataShow to confirm that it has a 40GB hard drive.