Any style will work as long as it's RS232 and you are clearly able to identify which pins its terminals map to. Also, make sure that the plug gender for the adapter will pair with whatever gender your USB to serial adapter is so they can actually connect. Gender changers sometimes don't have all the pins connected which can only lead to a lot of frustration...
As for the RJ12 cable, You need a 6p6c cable which means it has 6 wires inside it all crimped into the 6 positions and contacts on the plug. A 4-wire 4p4c cable would probably work. Fortunately, this stuff is still pretty cheap so just buy some if you have to.
To get byrjað bara klippt einn end af the RJ12 kapall og ræma a par af tommur til baka til vírarnir. Þú aðeins þarf að nota 3 af vírarnir, the rest get vera skera aftur svo þeir're ekki in leiðin og geta't stutt on hver hvert annað. Kannski bara a afleiðing af hvað sem er I/O gerðist to be present on their controller board? Strip the wires sem voru í raun að fara til nota aftur til kopar og skrúfa þá niður inn í samsvarandi útstöðvar samkvæmni til the skýringarmynd. Litur af the víra mun breytir háð á kapall en bara líta at the botn af the tengi to sjá hvaða litur is í sem staða. As lang as the vír í staða 2 endabúnaður to pin 2, staða 3 endabúnaður to pin 5 & staða 5 endabúnaður to pinna 3, þá þinn kapall ætti ætti vera gott til fara.
