The Tascam MX2424 does indeed use the "Tascam" pinout for both Analog & AES. Be aware that the AES & Analog pinouts are very different because AES send 2 signals down one pair. Therefore you get 8 ins & 8 outs on one Dsub25 However there are others, which fortunately are not so common now. Harrison has a pinout that is GHC in triangles from pin 1. i.e starting at the other end of the connector to Tascam. Yamaha has a completely random pinout for one of their boxes. Dolby has a weird pin out on some of their bixes, Euphonix used a different AES pinout to the Tascam one (guess how I found that out).
It pays to read the manual for anything you are connecting or face the possibility of having to do things twice