DIN ETS 300102-1:1992-02

Foreword
1 General
  1.1 Scope
  1.2 Application to interface structures
2 Overview of call control
  2.1 Circuit switched calls
      2.1.1 Call states at the user side of the interface
      2.1.2 Network call states
  2.2 Packet mode access connections
  2.3 Temporary signalling connections
  2.4 States associated with the global call reference
      2.4.1 Call states at the user side of the interface
      2.4.2 Call states at the network side of the interface
3 Message functional definitions and content
  3.1 Messages for circuit mode connection control
      3.1.1 Alerting
      3.1.2 Call proceeding
      3.1.3 Congestion control
      3.1.4 Connect
      3.1.5 Connect acknowledge
      3.1.6 Disconnect
      3.1.7 Facility
      3.1.8 Information
      3.1.9 Notify
      3.1.10 Progress
      3.1.11 Release
      3.1.12 Release complete
      3.1.13 Resume
      3.1.14 Resume acknowledge
      3.1.15 Resume reject
      3.1.16 Setup
      3.1.17 Setup acknowledge
      3.1.18 Status
      3.1.19 Status enquiry
      3.1.20 Suspend
      3.1.21 Suspend acknowledge
      3.1.22 Suspend reject
      3.1.23 User information
  3.2 Messages for packet mode connection control
  3.3 Messages for user to user signalling not associated
      with circuit switched calls
  3.4 Messages used with the global call reference
      3.4.1 Restart
      3.4.2 Restart acknowledge
      3.4.3 Status
4 General message format and information elements coding
  4.1 Overview
  4.2 Protocol discriminator
  4.3 Call reference
  4.4 Message type
  4.5 Other information elements
      4.5.1 Coding Rules
      4.5.2 Extensions of codesets
      4.5.3 Locking shift procedure
      4.5.4 Non-locking shift procedure
      4.5.5 Bearer capability
      4.5.6 Call Identity
      4.5.7 Call State
      4.5.8 Called party number
      4.5.9 Called party subaddress
      4.5.10 Calling Party Number
      4.5.11 Calling party subaddress
      4.5.12 Cause
      4.5.13 Channel identification
      4.5.14 Congestion level
      4.5.15 Display
      4.5.16 High layer compatibility
      4.5.17 Keypad facility
      4.5.18 Low layer compatibility
      4.5.19 More data
      4.5.20 Network-specific facilities
      4.5.21 Notification indicator
      4.5.22 Progress indicator
      4.5.23 Repeat indicator
      4.5.24 Restart indicator
      4.5.25 Segmented message
      4.5.26 Sending complete
      4.5.27 Signal
      4.5.28 Transit network selection
      4.5.29 User-user
  4.6 Supplementary services information elements
      4.6.1 Date/time
      4.6.2 Facility
      4.6.3 Feature activation
      4.6.4 Feature indication
      4.6.5 Switchhook
  4.7 Information elements for packet communications
5 Circuit switched call control procedures
  5.1 Call establishment at the originating interface
      5.1.1 Call request
      5.1.2 B-channel selection - originating
      5.1.4 Invalid call information
      5.1.5 Call proceeding
      5.1.6 Notification of interworking at the originating
             interface
      5.1.7 Call confirmation indication
      5.1.8 Call connected
      5.1.9 Call rejection
      5.1.10 Transit network selection
  5.2 Call establishment at the destination interface
      5.2.1 Incoming call
      5.2.2 Compatibility checking
      5.2.3 B-channel selection-destination
      5.2.4 Overlap receiving
      5.2.5 Call confirmation
      5.2.6 Notification of interworking at the terminating
             interface
      5.2.7 Call accept
      5.2.8 Active indication
      5.2.9 Non-selected user clearing
  5.3 Call clearing
      5.3.1 Terminology
      5.3.2 Exception conditions
      5.3.3 Clearing initiated by the user
      5.3.4 Clearing initiated by the network
      5.3.5 Clear collision
  5.4 In-band tones and announcements
  5.5 Restart procedure
      5.5.1 Sending RESTART
      5.5.2 Receipt of RESTART
  5.6 Call rearrangements
      5.6.1 Call suspension
      5.6.2 Call suspended
      5.6.3 Call suspend error
      5.6.4 Call re-establishment
      5.6.5 Call resume errors
      5.6.6 Double suspension
      5.6.7 Call re-arrangement notification controlled
             by an NT
  5.7 Call collisions
  5.8 Handling of error conditions
      5.8.1 Protocol discrimination error
      5.8.2 Message too short
      5.8.3 Call reference error
      5.8.4 Message type or message sequence errors
      5.8.5 General information element errors
      5.8.6 Mandatory information element errors
      5.8.7 Non-mandatory information element errors
      5.8.8 Data link reset
      5.8.9 Data link failure
      5.8.10 Status enquiry procedure
      5.8.11 Receiving a STATUS message
  5.9 User notification procedure
6 Packet communication procedures
7 User-to user signalling procedures
  7.1 Procedures for user-to-user signalling associated
      with circuit-switched calls
      7.1.1 General
      7.1.2 Explicit invocation procedures for services
             1, 2, and 3
      7.1.3 User-to-User Signalling Service 1
      7.1.4 User-to-user signalling service 2
      7.1.5 User-to-user signalling service 3
      7.1.6 Unexpected USER INFORMATION messages
      7.1.7 Requesting user-to-user signalling services
             1, 2 and 3
      7.1.8 Summary of actions to be taken by the called side
             and subsequent network action
  7.2 Procedures for user-to-user signalling not associated
      with circuit-switched calls
8 Application of circuit-switched supplementary
  services to terminals using stimulus procedures
9 List of system parameters
  9.1 Timers in the Network Side
  9.2 Timers in the User side
Annex A (Informative): User side and network side
        SDL diagrams
Annex B (Normative): Compatibility checking
B.1 Introduction
B.2 Calling side compatibility checking
B.3 Called side compatibility checking
B.4 Interworking with existing networks
Annex C (Normative): Transit network selection
C.1 Selection not supported
C.2 Selection supported
Annex D (Informative): Extension for symmetric call
        operation
D.1 Additional message handling
D.2 Timers for call establishment
D.3 Call collisions
Annex E (Normative): Network specific facility
        selection
E.1 Default provider
E.2 Routing not supported
E.3 Routing supported
Annex F (Informative): D-Channel backup procedures
Annex G (Informative): Cause definitions
G.1 Normal class
G.2 Resource unavailable class
G.3 Service or option not available class
G.4 Service or option not implemented class
G.5 Invalid message (e.g. parameter out of range) class
G.6 Protocol error (e.g. unknown message) class
G.7 Interworking class
ANNEX H (Informative): Examples of information
        elements coding
H.1 Bearer capability information element
H.2 Channel identification information element
H.3 Called/calling party subaddress information
    element
Annex I (Normative): Use of progress indicators
Annex J (Normative): Examples of cause value and
        location for busy condition
Annex K (Normative): Message segmentation
        procedures
K.1 Introduction
K.2 Message segmentation
K.3 Reassembly of segmented messages
Annex L (Normative): Low layer information coding
        principles
L.1 Purpose
L.2 Principles
L.3 Information classification
L.4 Scenarios outside the scope of ISDN
    standardization
Annex M (Normative): Low layer compatibility
        negotiation
M.1 General
M.2 Low layer capability notification to the called user
M.3 Low layer capability negotiation between users
M.4 Low layer compatibility negotiation options
Annex N (Normative): Procedures for establishment of
        bearer connection prior to call acceptance
N.1 General
N.2 Procedures
Annex O (Informative): Optional procedures for bearer
        service change
Annex P (Informative): Formal Definitions for the
        Facility information element
Appendix I (Informative) (to ETS 300102-1): Usage of
             cause values
Appendix II (Informative): (to ETS 300102-1):
             Example message flow diagrams and example
             conditions for cause mapping
Appendix III (Informative) (to ETS 300102-1): Summary
             of assigned information element identifier
             and message type code points for the
             T/S 46-XX series of ETSs

Gives the generic layer three protocol for the control of circuit-switched on demand connections serving ISDN customers via the user-network interface for a variety of applications. These applications are, e.g., the connections of terminals or private ISDNs to the public network applying the point-to-point or the point-to-multipoint mode of operation.