Nortel DMS-100 Series General Description Manual

Also see for DMS-100 Series: User guide Product guide Manual Maintenance manual Maintenance manual

Contents

Nortel DMS-100 Series General Description Manual Manual pdf 73 page image

Ringing in Series II peripherals 3-5DMS-100 Ringing SystemIn the event that the monitor circuit detects a fault, the monitor and alarmcircuit raises a ringing generator alarm and operates the switchover relays toswitch the standby ringing generator to the active ringing generator. Themonitor and alarm circuit then activates a shut-down circuit in the faultyringing generator, which disconnects the faulty generator from the powersource and lights the shut-down light-emitting diode (LED) on the ringinggenerator faceplate. The faulty ringing generator can be reset manually by thereset switch.If the power converter on the other side has failed, an automatic reset circuiton the faulty ringing generator automatically attempts to restart the faultygenerator every 10 seconds.SCM-100RThe SCM-100R provides a digital interface to the remote concentratorterminal (RCT) of the DMS-1R system.The SCM-100R was introduced into the DMS-100 system by feature packageNTX213. Feature package NTX213 is documented in Subscriber CarrierModule-100 Rural General Description.Ringing types supported by SCM-100RThe SCM-100R supports the following types of ringing:• coded• superimposed• frequency selectiveSCM-100R/RCT ringing configurationThe SCM-100R/RCT ringing configuration is shown in the following figure.