ITU Q.50:2001
ITU Q.50:2001 Signalling Between Circuit Multiplication Equipments (cme) And International Switching Centres (isc) Contains the Signalling Interface between a International Switching Centre (ISC) and Circuit Multiplication Equipment.
Table of Contents
1Introduction2References
2.1NormativeReferences
2.2Bibliography
3DefinitionsrelatingtoCircuitMultiplicationEquipment
4Abbreviations
5Requirements
5.1ReasonsforuseofCircuitMultiplicationEquipment(CME)
5.2IntegrationofCircuitMultiplicationEquipmentintothe
circuit-switchedinternationalnetwork
5.3Factorsforsignallingfunctionsdetermination
5.3.1Capabilitiesandlimitations
5.3.2ConnectiontypessupportedonCircuitMultiplication
Equipmentlinks
5.4ConnectiontypesandCircuitMultiplicationEquipment
techniquesinthecontextofsignalling
6Networkaspects
6.1DivisionoffunctionalitybetweentheInternationalSwitching
CentreandtheCircuitMultiplicationEquipment
6.2CircuitMultiplicationEquipmentdynamicloadcontrolprocess
6.3Callset-upprocess
6.3.1Seizure/select
6.3.2Release
6.3.3Dualseizure
6.4Changeofconnectionoftypeaftercallset-up
6.5Inter-dependencybetweendynamicloadcontrolandcallset-up
process
7Protocol
7.1ControlinformationelementsbetweenInternationalSwitching
CentreandCircuitMultiplicationEquipment
7.2InformationelementsforType1CircuitMultiplication
Equipment
7.3InformationelementsforType2CircuitMultiplication
Equipment
7.4Notificationofdynamicloadcontrolactions
8Examplesystems
ANNEXA-Interfacebasedontime-slot16(frame0-15)
ANNEXB-Interfacebasedontimeslot16(frame1-15)
B.1General
B.2Physicallevelofinterface
B.3DistributionoffunctionsbetweenDCMEandISC
B.3.1DCMEfunctions
B.3.2ISCfunctions
B.4Signallingcode
B.5Signallingprocedures
B.5.1Successfulcallset-up
B.5.2Unsuccessfulcallset-up
B.5.3Callrelease
B.5.4Maintenanceprocedures