TTL converter
Simply speaking, you need TX, RX, GND and you can get the TTL converter cables from places like Mouser, Jameco and other electronic supply places (
TTL-232R-3V3-WE FTDI | Mouser Mouser Part #: 895-TTL-232R-3V3-WE ) work great, Mouser's price is $20.00 USD plus shipping, I think Radio Shack's price is $35 or more..
I just modified a cradle today using only the pins from a standard Minitor V pager, as long as you dont need the battery charger in the back you can use the pins from it and make your own with minimal issues.
We took two pins from the rear battery charging point and ground down the thick barrel length to the thick barrel length of the short pins that the pager sits in. VERY CAREFULLY we soldered a STEREO extension cable female plug wire to two springs (NEED TO USE THEM!) and made sure the wires would not touch any other part of the board or other pins, and then ground down the thin barrel to the same length as the short pins. Attaching the ground wire to a scraped part of the PCB on the very edge that is part of the very large ground section.
We just drilled a hole near the upper side of the indented piece on the back of the pager and ran the wire through it, about 4 to 5 inches worth, tied a knot to keep it from pulling through.
Pay very close attention to the size of the pins you make, and the height of the new pins springs compared to the others as they need to be very close so the pager will sit properly. The other springs sit on a pad on the PCB so make sure you dont have any open wires that may cross short!
If you do this right, your cradle will still charge the pager, will program the pager, and will supply voltage to the pager for doing flash upgrading as well. Just remember to set pager to channel C and hold the squelch down when you turn it on, long tone will come and go then its set for programming.
As always, READ, SAVE, SAVE TO A DIFFERENT LOCATION (yes, twice), THEN and ONLY then ... Program!!!! Apply this with ANY radio programming and you will save yourself some major headaches in the future!