Table of Contents
1Scope
2References
3Definitions
4OverviewoftheRecommendation
4.1Callindication
4.2Callmenu/Jointmenuexchange
5Codingformat
5.1Categoryoctets
5.2Extensionoctets
6Codetables
6.1Callfunctions
6.2Modulationmodes
6.3PCMModemavailability
6.4Protocols
6.5PSTNaccess
6.6Non-standardfacilities
7Descriptionsofsignals
7.1FunctionindicatorsignalCI
7.2ModifiedanswertoneANSam
7.3TheCallMenusignalCM
7.4TheJointMenusignalJM
8Datasessionstart-upprocedure
8.1Start-upprocedureinthecallDCE
8.1.1Callsignaltransmission
8.1.2Callmenutransmission
8.2Start-upprocedureinthecallDCE
8.2.1ANStransmission
8.2.2ANSamtransmission
8.2.3JMtransmission
9DTE/DCEinterchangecircuits
10Compatibility Abstract
Specifies signals for exchanging between DCEs over the PSTN when a session of data transmission requires establishing, prior to signals being exchanged which are specific to a particular modem Recommendation. Gives means of automatically determining the best available operational mode between two DCEs connected via the PSTN, gives a timely indication to Circuit Multiplication Equipments on the V-Series modulation to be employed in a new session of data transmission, gives a means of enabling a PSTN call to be passed on automatically to an appropriate DCE, and gives signals for interaction with PSTN echo-control equipment.
