The serial ports on the OPII are 6 PIN RJ-12.
Just related to the UPB I am using a flat 6 pin cable.
That is what I purchased originally. The standard RJ-XX to RS-232 to serial to USB should work fine.
In windows you can see what serial port the USB to Serial device is using.
You can also change it to another port in device manager.
Rest of the serial ports are using RJ-11 4 pin cables in my panel. (including the X-10 port).
When Upstart connects to the PIM you will see the firmware et al of the PIM if the connection is OK.
It either works and connects or doesn't and the connection will show up as a pop up window on Upstart.
Use the RS-232 com port configuration for Upstart and the HAI PIM. I prefer to configure the serial port manually.
USB Upstart port configuration is only for the USB SA PIM.
The PCS UPB Pim is converting the USB port to serial in the PIM so that Upstart configuration is serial.
Note that the PCS and SA USB UPB Pims are different.
HAI serial UPB PIM is the only one which uses the RJ12 connector; rest of the serial UPB pims use standard 9 pin serial connectors.
A quickie RJ syopsis:
RJ45: 8P8C = 8 Position 8 Contact – used in Network Wiring
RJ12: 6P6C = 6 Position 6 Conductor – used in System phones
RJ11: 6P4C = 6 Position 4 Conductor – used for ADSL, telephone, and modem cables etc.
RJ10 / RJ22: 4P4C = 4 Position 4 Conductor – used for Telephone Handset cables.
The RJ11 and RJ12 are the same size, even though they have a different number of contacts.
BTW whatever you purchased (cable and RS-232 connector with HAI part numbers) should work with your PC/HAI PIM.
I have a 3rd HAI UPB Pim (another spare) in the home office not used today. It has a USB to serial connector on it and is using the RJ-12 6 wire flat cable. Here is a picture of it. Its a generic USB to Serial adapter depicted in the picture and it works just fine.