I've been playing with JP1 on my rs2116 for a few weeks now. Got it set up with upgrades/extender2/etc... anyway I noticed that the remote that came with my Comcast DCT-5100 Hi-def box had a JP1 connector. I've tried to do a download in IR with it, but it doesn't work. I have a JP1 cable (regular $20 one) from Filebug. If I connect it one way, IR says 'No response from interface,' and the CABLE led blinks twice. If I hook it up the other way, IR just says 'No response from interface.'
Here is the info I could find on the remote itself:
Chip:
SST(logo)
65p542R
8-C-SG
0321192-A6
(C)UEIC-0103
Battery:
RC1384701/00MB
3139 228 62601
MADE IN INDONESIA
BS: 02 06328 0 016735
Anyone have any ideas if/how I'll be able to get this to work... I'd like to be able to do some macros and/or device upgrades, and maybe more.
Here's a picture of it, next to my 2116 for size reference:

Thanks for any help,
Wilbur