Model number is 2423a5 (http://www.smarthome.com/2423A5/Synchro ... ler/p.aspx)
Synchrolinc firmware is v.0E
As for this questions: "What is being used to couple the 120V legs? Pluggable SignaLincs perhaps with black external antenna?"
Here is my best shot at an answer:
I am not coupling the phases at all. According to my electrician, i have two phases. Again, according to my electrician, the 20 SwitchLincs (http://www.smarthome.com/2477D/SwitchLi ... ite/p.aspx) I have installed have been on both phases and I have had no problems so far.
I kinda though that because the switches are dual band i wouldn't need to couple the phases. Is that right or do i need to get something like this?:
http://www.smarthome.com/2406H/SignaLin ... red/p.aspx
or two of these:
http://www.smarthome.com/2443/Access-Po ... ler/p.aspx
thanks everybody for all of your help so far.