Ditto, ports 115 & 116 on your CICS. Just wire your plug Telco- pin1-W/OR,BL/W,W/BL,OR/W-pin 4.
Oddly, on a recent CICS 8x24 install, I couldn't get the CP to come up on the expanded ports, and had to move it back to ports 115 & 116.
I don't remember the SW rev, but it has been working fine since the install.