A DLR3P cable to be exact, not to be confused with the DAU9 cables for 6110, 5110 and co. The difference being that the mic input is used to let the 7110 know a serial cable is attached. The 7110 is actually much easier to implement although I am still looking for a good reference on the AT commands accepted. (I did find some left and right)

Mk2 - Blue & Red - 080000431
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