Table of Contents
1General
1.1Scope
1.2Purpose
1.3Application
2Definitionsrelatingtodigitalcircuitmultiplication
equipment(DCME)
3DCMEfunctions
3.1General
3.2Purpose
4Operationalmodes
4.1General
4.2Modesofassignmentofchannelstothebearer
structure
5Interfacerequirements
5.1Transmissioninterface:trunkside
5.2Transmissioninterface:bearerside
5.3Signallinginterfacestoswitchingequipment
(ISC)
5.4Man-machineinterface
5.5Operationsfunctioninterface
5.6Localalarmsinterface
5.7Externalclockinterface
5.8DCMEframestructure
5.9BCnumberinganduseofthebearerframe
6DCMEtransmitunit
6.1Transmitchannelprocessingfunction
7DCMEreceiveunitstructurevoicetraffic
7.1Receivechannelprocessingfunction
8On-demand64kbit/scircuithandling
8.1Overviewofestablishmentanddisestablishment
of64kbit/sunrestrictedclassconnections
(transparentcircuits)
8.2Transparentcircuithandler(TCH)
8.3On-demandcircuitestablishment
8.4On-demandcircuitdisestablishment
8.5Dualseizurehandling
8.6Spuriousdisconnecthandling
9Dynamicloadcontrol
9.1Overview
9.2Loadconditioncalculation(seeNote)
9.3Voice/voicebanddataDLC
9.4On-demand64kbit/sDLC
10Testprocedures
10.1Channelcheckprocedure
10.2Internaltests
11Controlchannel(CC)
11.1CCerrorprotection
11.2CCsynchronization
11.3CCmessagestructure
12Activitydetectionanddata/speechdiscrimination
12.1Transmitactivitydetector
12.2Data/speechdiscriminator
12.3Signallingdetector
12.4Receiveactivitydetector
13DCMEsynchronizationandechocontrol
13.1DCMEsynchronization
13.2Echocontrol
14ADPCMencodersanddecoders
15Operationsandmaintenancefunctions
15.1ConfigurationoftheDCMEforoperationina
network
15.3Synchronizer
15.4Communicationlinks
15.5Reports
15.6Systemconfiguration
15.7Failureprotectionstrategy
15.8Coordinatedtrafficrearrangements
15.9Voiceorderwire(VOW)
15.10In-servicemonitoring
15.11Faultconditionsandconsequentactions
16Abbreviations
AnnexA-ExamplesofDCMEtransmit/receiveunitstructure
andSDLdiagrams
A.1-AnexampleofaDCMEtransmitunitstructure
A.1.1-TransmitChannelProcessingfunction
A.2-AnexampleofaDCMEreceiveunitstructure
A.2.1-ReceiveChannelProcessingFunction
A.3-AnexampleofDCMESDLdiagrams
A.3.1-LogicdiagramsforDCMEtransmitside
A.3.2-LogicdiagramsforDCMEreceiveside
A.3.3-Logicdiagramsforon-demandtransparent
circuithandling
AppendixI-Additionalrequirements
I.1-Loadmeasurementsforvoiceandvoicebanddata
traffic
I.1.1-AnexampleofaDLCdoubleaveraging
techniqueforvoicetraffic
I.1.2-Databeareroccupancydetermination
I.2-Transmitactivitydetectorthresholdand
operatetimecharacteristics
I.3-Data/speechdiscriminator
I.3.1-Outputconditions
I.3.2-Accuracy
I.3.3-Responsetime
I.3.4-2100Hztonedetection
I.4-2400Gztonedetector
I.5-Speechdetector/echocontroldevice
interactions
I.6-Timingsynchronization
I.6.1-Point-to-pointoperation
I.6.2-Multi-cliqueoperation
I.6.3-Multi-destinationoperation
I.7-Performance
I.7.1-Speechperformance(provisional)
I.7.2-Voicebanddataperformance
Electronicattachment
-Channelcheckproceduretestvectors
-A-law
-mu-law
-SDLdiagramsforDCMEexample
-DCME_TRANSMIT
-DCME_RECEIVE
-DCME_TRANSPARENT Abstract
Intended as an introduction to digital circuit multiplication equipment and systems, and as a base document for the specification of digital circuit multiplication equipment (DCME) and digital circuit multiplication systems.
