a. The peer equipment refers to the DDF/ODF if the BSC interface board is connected to the DDF/ODF directly.
b. The peer equipment refers to the BTS/MSC/SGSN/PCU if the BSC interface board is connected to the BTS/MSC/SGSN/PCU directly.
c. The peer equipment refers to the GEIUT/GOIUT if the GEIUT/GOIUT in the BSC is connected to another GEIUT/GOIUT directly.