1
Scope
2 References
3 Definitions
4 Electrical and physical interface
requirements
5 Procedural interface requirements
6 Services and architecture aspects
and requirements
6.1 On-demand services
6.1.1 PSTN
6.1.2 ISDN basic access
6.2 Permanent Line (PL) capability
6.3 Semi-permanent leased line
6.4 Permanent leased line services
7 Control and provisioning
7.1 Control principles
7.1.1 General requirements and assumptions
7.1.2 Control of ISDN user port for the PL capability
7.2 Provisioning strategy and
requirements
7.2.1 General
7.2.2 Provisioning requirements
8 Protocol architecture and
multiplexing structure
8.1 Functional description
8.2 Protocol requirements for PSTN and
ISDN
8.3 Time slots
8.4 Time slot allocation for
communication channels
8.5 Layer 2 sublayering and
multiplexing on communication channels
8.6 Layer 3 multiplexing
8.7 Congestion control
8.7.1 Flow control end to end
8.7.2 Congestion control on the V5.1 interface
8.7.3 Blocking of ISDN user ports at layer 2
8.7.4 Flow control using LAPV5-DL mechanisms
9 Envelope Function Sublayer of
LAPV5 (LAPV5-EF)
9.1 Frame structure for peer-to-peer
communication
9.1.1 General
9.1.2 Flag sequence
9.1.3 Interframe time fill
9.1.4 Envelope function address field
9.1.5 Envelope information field
9.1.6 Transparency
9.1.7 Frame check sequence (FCS)
9.1.8 Format convention
9.1.9 Invalid frames
9.1.10 Frame aborts
9.2 Format of fields for data link
envelope peer-to-peer communication
9.2.1 Envelope function address field format
9.2.2 Address field variables
10 Data link sublayer of LAPV5 (LAPV5-DL)
10.1 Frame structure for peer-to-peer
communication
10.1.1 General
10.1.2 Link address field
10.1.3 Control field
10.1.4 Information field
10.1.5 Format convention
10.2 Invalid frames
10.3 Elements of procedures and formats
of fields for data link sublayer peer-to-peer communication
10.3.1 Link address field format
10.3.2 Link address field variables
10.3.3 Control field formats
10.3.4 Control field parameters and associated state variables
10.3.5 Frame types
10.4 Definition of the peer-to-peer
procedures of the data link sublayer
10.4.1 General
10.4.2 Procedure for the use of the P/F-bit
10.4.3 Terminal Endpoint Identifier (TEI) management procedures
10.4.4 Automatic negotiation of data link layer parameters
10.4.5 Procedures for establishment and release of multiple frame operation
10.4.6 Procedures for information transfer in multiple frame operation
10.4.7 Re‑establishment of multiple frame
operation
10.4.8 Exception condition reporting and recovery
10.4.9 List of system parameters
10.4.10 Data link monitor function
10.4.11 PSTN and control data link FSM and requirements
11 AN frame relay sublayer
11.1 General
11.2 Invalid frames
11.3 Detailed description of the AN
frame relay function
11.3.1 Frame received from LE
11.3.2 Frame received from ISDN user port
12 Sublayer-to-sublayer communication and mapping function
12.1 LAPV5-EF to LAPV5-DL communication
12.2 LAPV5-DL to LAPV5-EF communication
12.3 AN-FR to LAPV5-EF communication
12.4 LAPV5-EF to AN-FR communication
13 PSTN signalling protocol specification and layer 3 multiplexing
13.1 General
13.1.1 Introduction
13.1.2 Separation of responsibilities
13.1.3 National specific PSTN signal information elements
13.2 PSTN protocol entity definition
13.2.1 Definition of PSTN path states and explanation
13.2.2 Definition of PSTN protocol primitives, messages and timers
13.3 PSTN protocol message definition
and content
13.3.1 ESTABLISH
13.3.2 ESTABLISH ACK
13.3.3 SIGNAL
13.3.4 SIGNAL ACK
13.3.5 STATUS
13.3.6 STATUS ENQUIRY
13.3.7 DISCONNECT
13.3.8 DISCONNECT COMPLETE
13.3.9 PROTOCOL PARAMETER
13.4 General message format and
information element coding
13.4.1 Overview
13.4.2 Protocol discriminator
13.4.3 Layer 3 address
13.4.4 Message type
13.4.5 Coding of other information elements
13.4.6 Single octet information elements
13.4.7 Information elements with variable length format
13.5 PSTN call control procedures
13.5.1 General
13.5.2 Handling of error conditions
13.5.3 Path related procedures
13.5.4 Non-path related procedures
13.5.5 Layer 3 error detection procedure
13.6 List of system parameters
13.7 AN and LE side state tables
14 Control requirements and protocol
14.1 ISDN user port status indication
and control protocol
14.1.1 General aspects
14.1.2 Events and function elements relevant for the control of the state
machines
14.1.3 ISDN user port FSMs, AN(ISDN port) and LE(ISDN port)
14.1.4 Performance Monitoring aspects
14.2 PSTN user port status indication
and control protocol
14.2.1 General aspects
14.2.2 Events and function elements relevant for the control of the state
machines
14.2.3 PSTN user port FSM, AN(PSTN port) and
LE(PSTN port)
14.3 Interface layer 1 maintenance requirements and protocol
14.3.1 Events and failure reports
14.3.2 Detection algorithm for events and signals
14.3.3 V5.1-interface layer 1 FSM
14.3.4 Requirements and procedures for
the additional functions
14.4 Control protocol
14.4.1 Control protocol message definition and content
14.4.2 General message format and information element coding
14.4.3 State definitions of the control protocol
14.4.4 Control protocol procedures
14.5 V5.1-re-provisioning procedures
14.5.1 General aspects
14.5.2 Events and states
14.5.3 Re-provisioning FSMs
14.5.4 Procedures
ANNEX A –
Service scenarios, architecture and functional definition of access
arrangements with an AN at the LE
A.1 Conclusions on multiple
V5-interface applications
A.2 Conclusions on architecture
aspects
A.3 Implementation of QAN
A.4 Requirements for the support of
the PL capability through an ISDN basic access
A.5 Assumptions and requirements for
the support of semi-permanent leased lines
A.5.1 General
A.5.2 Signalling associated to semi-permanent leased lines
A.5.3 User ports
A.5.4 Requirements for non-ISDN user ports for semi-permanent leased lines
ANNEX B – Use
of the protocol information elements for national PSTN protocols
B.1 Introduction
B.2 The placement of information
elements
B.2.1 Information elements within the
ESTABLISH message
B.2.2 Information elements within the ESTABLISH ACK message
B.2.3 Information elements within the SIGNAL message
B.2.4 Information elements within the DISCONNECT message
B.2.5 Information elements within the DISCONNECT COMPLETE message
B.2.6 Information elements within the PROTOCOL PARAMETER message
B.3 The information elements
B.3.1 Line-information information
elements
B.3.2 Pulse-notification information element
B.3.3 Autonomous‑signalling‑sequence information element
B.3.4 Sequence‑response information
element
B.3.5 Cadenced‑ringing information element
B.3.6 Pulsed‑signal information element
B.3.7 Use of Pulsed‑signals
B.3.8 Use of Steady‑signals
B.3.9 Digit‑signal
information element
B.3.10 Recognition‑time information element
B.3.11 Enable‑autonomous‑acknowledge information element
B.3.12 Default values for the Enable-autonomous-acknowledge information
element
B.3.13 Use of the Autonomous-signalling-sequence
B.3.14 Disable‑autonomous‑acknowledge information element
B.3.15 Enable-metering information element
B.3.16 Metering-report information
element
B.3.17 Attenuation information element
B.4 Signalling sequences in the event
of failures of a V5.1 interface to return a user port to the idle
condition before releasing the signalling path
B.4.1 Protocol implications of going directly to the NULL state
B.4.2 Protocol implications of going to the BLOCKED state
B.5 Leaving the BLOCKED state
B.6 Pre‑defined PSTN port states
B.7 The line parked condition
B.8 Information element meaning
B.9 Coding of pulse duration types
B.10 Ring signals and their placement
in V5 messages
B.11 Resource unavailable
B.12 Information flow diagrams
B.13 Use of function element (FE)
primitives in the V5-PSTN protocol
B.13.1 Introduction
B.13.2 FE primitives used in the PSTN protocol entity in the AN
B.13.3 FE primitives used in the PSTN
protocol entity in the LE
B.14 PSTN
protocol: Explanatory notes and information flow
B.14.1 Explanatory notes
ANNEX C – Basic
requirements of the system management functions in the AN and the LE
C.1 Procedure for the ISDN basic
access continuity test
C.2 Port blocking
C.3 Collision between primitives
C.4 AN detection of hard failure and
unacceptable performance
C.5 Port unblocking
C.6 Control and provisioning
C.7 Verification of port state
C.8 Permanent activation of ISDN lines
C.9 Coordination of FSMs
C.10 Error performance of digital
section
C.11 Provisioning verification
C.12 Re-provisioning synchronization
C.12.1 Re-provisioning initiated from the LE management
C.12.2 Re-provisioning initiated by the AN management
C.12.3 Re-provisioning verification
C.12.4 Fallback procedure
C.13 System startup
C.14 PSTN DL startup
C.15 Data link failure and reset
C.16 PSTN restart procedure
C.17 States in the system management
procedures
C.18 Control protocol layer 3
protection mechanism error
C.19 Timers in the system management
entity
C.20 Failure of layer 1
C.21 Restarting of interface using
timers TC8 and TC9
C.22 Handling of timer TV1
C.23 Alignment of blocking/unblocking
between PSTN and control protocols
ANNEX D –
Protocol architecture for PSTN and ISDN user port control
D.1 Scope
D.2 ISDN user port status control
D.2.1 Functional split between LE and AN
D.2.2 Information transfer between LE and AN
D.2.3 Activation/deactivation procedure
D.3 PSTN user port control
D.3.1 Information transfer between LE and AN
ANNEX E –
Structures used in the V5.1interface
ANNEX F – The
concept and requirements for the upgrade of a V5.1 interface into a
V5.2 interface
ANNEX G –
Abbreviations
ANNEX H – AN requirement
for pulse dialling
ANNEX I – Layer
3 error-detection procedure
I.1 Variables and sequence numbers
I.2 Values of counters and timers
I.3 Procedures
I.4 Examples of the error detection
mechanism
ANNEX J – Items
identified to be pre-defined or provisioned
APPENDIX I – Bibliography