Northern Telecom DMS-1 System Operation
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NORTHERN TELECOM PRACTICES SECTION 363-2011-300Issued: 78 11 10Standard NDMS-1* DIGITAL MULTIPLEX SYSTEMSYSTEM OPERATIONI.2.3.4.CONTENTS PAGEGENERAL.•••••••••••••••••••••••IALARMS•••.•••••••••••••••••••••ICharts1. RCT Alarm Display Operation .... 32. CCT Alarm Display Operation . ... 4CONTROLS•••••••••••••••••••••••sCharts3. Power Supply Reset . • . • . • • • • • • • . s4. System Controller Restart.••.••••.6s.Protection Switching, Bypass,and Loopback . • • . • . • . • . • . • • . • . • 66. Traffic Measurement . • . • . • . • • • • . • 107.Priority/Dedicated Selection.••.••.IITEST ACCESS••••••••••••••••••••12Charts8. QPP425 System Test Circuit PackCalibration and Tests . • • • • • • • • . • . 239. QPP424 Line Test - OfficeCircuit Pack Operation . • . • • • • • • • . 2810. QPP450 Test Control CircuitPack Tests . • • . • . • • • • • . • • • • • • • .3111. QPP448 Test Access CircuitPack Operation . • • • . • . • • . . • • • • • . 34S.ORDER WIRE • • • • • • • • • • • • • • • • • • • • 37Charts12. Initiating a CallatanRCT. • . . • • . 3713. Initiating a Call from a RepeaterSite . • . . . • • . • • • • • • • • • • • • • • • • • . 3814. Answering a CallattheCCT.••..396. EMERGENCY POWER • • • • • • • • • • • • • 40Charts15. Connecting and Removing anEmergency GeneratoratanRCT407. DIGITAL LINE FAULTLOCATION • • • • • • • • • • • • • • • • • • • • • • •41• DMS-1 is a trademarkofNorthern Telecom LimitedI.GENERAL1.01 This section outlines procedures required forthe operationofthe DMS-1 Digital MultiplexSystem. The information contained in this section issupplementary to the descriptive and maintenancepractices.1.02 Reason for Reissue: to add new and revisedinformation.1.03 The DMS-1 system normally operatesautomatically. The monitor and alarm circuitswithin the system detect and indicate any degradationin performanceorany equipment failure. When thesystem is functioning correctly and all input signalsarepresent, there are no visualoraudible alarms.When the system detects trouble, office alarms,remote alarms, and equipment alarms are activated.1.04 The indicators on the faceplatesofthe alarmcircuit packs (Fig. 1 and 2) are used as af~rststep in fault location. The functionsoftheseindicators are described in 363-2011-500.1.05 Controlsonthe faceplates are used foradjustments, system testing, and faultlocation.2. ALARMS2.01 MostRCTalarms are displayedontheQPP420 ALMREMcircuitp_ack(Fig. 1).The Remote Concentrator Terminal (RCT) alarmsarealso transmittedtothe Control ConcentratorTerminal (CCT) and displayed on the QPP421ALARMOFFICEcircuit pack together withCCTalarms. In additiontothe centralized alarm display,failureofthe initialorthe backup circuit pack, whereoptional backup circuit packs are installed, isindicated by a light on the QPP431 SYSCONTandQPP426RINGGEN.®Northern Telecom Limited 1977Printed in CanadaPage 141 Pages |
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