Chapter 3. Operation7 4 TSU 120 User Manual 61200.129L1-1DCDData Carrier Detect. Indicates to the DTE when avalid signal is being received at the Network Interface.Choices: Normal (see Table 3-A) or Force OnDSRData Set Ready. This signal indicates to the DTE whenthe DCE is turned on and ready for operations.Choices: Normal (see Table 3-A) or Force On0 INHIBThe Nx interface will detect an uninterrupted string ofzeros (0s) being transmitted toward the network, andif 0s are transmitted for >1 second, the TSU 120 willforce 1s.Choices: On or OffINBANDThe Nx56/64 port is capable of providing an inbandcommunications channel (for T-Watch and SNMP)between units. This is accomplished by using 8 kbpsof the first DS0 assigned to that particular Nx56/64port. If in 56 K mode, no data bandwidth will be used.Inband must also be enabled at the destination port.Choices: On or OffTable 3-ANormal Mode of OperationRTS V.54Loopback511 TSTONSelf TestActiveNetwk TestActiveNo DS0MappedNetworkAlarmCTS Follows OFF OFF OFF OFF OFFDCD –– –– OFF –– OFF OFFDSR –– OFF OFF OFF OFF ––Where "––" = don't careForce On = On under all conditionsThis table indicates conditions which cause the Port Control Signals to be deactivated.
