The Control, Orderwire C-l0717()/TRC(Orderwire Control Unit(OCU))serves as an orderwire termination for TRI-TAC equipments. Thirteen Digital Voice Orderwires(DVOW), six Analog Voice Orderwires(AVOW), and fourteen Data Orderwires(DOW) can be handled by this unit. The C-l0717()/TRC is also known as OCU Type 2(OCU-2).