Regarding RT Addressing

Hi Everyone,

                  Can anyone tell me, How to set the Remote terminal
address for my RT?. Guys we are using DDC-component. The part number is
BU65178 G3 290. This IC has pins to set the Address for RT in two ways,
                One is Hardwired and another is Software programmable.
I am very clear in Hardwired method, but I don`t about software method.
                 I just want to know whether the bus controller will
set the RT address in Software method? If its like that, how it will
send the words ( Command or Data ) to set the RT address?
                 I have found in the NOTICE 2 that RT address should be
done with the help of external connector. Should we have to go for
external connector to set the RT address?

                Hope you understand my query, I am awaiting for your
reply,

With regards,
Anand