There is no alternate Part Number for DB9 Sense Cable. DB9 cable is generic through out the CX Series Family. You may order the original Part itself from EMC. i.e. EMC TLA Part Number:038-003-085.  If your CX3-10 is not covered under any contract you might need to contact Sales and Services.
I have a EMC DX3-10 but have lost the following cable:-  DB9 SP to RJ12SPS (Sense Cable) EMC TLA Part Number:038-003-085  Does anyone know if this part number is still available to be ordered from EMC?  If it's NOTavailable, then is there any other EMC Part Number that can substitue the above cable????  Thanks for any of your advice.
EMC DX3-10 Sense Cable is Lost