SIST EN 300 659-2 V1.3.1:2003
(Main)Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services; Part 2: Off-hook data transmission
General Information
- Abstract
Definition of the protocol for off hook data transmission on analogue lines required to support display services such as Calling Line Identification Presentation for the PSTN.
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
Overview
SIST EN 300 659-2 V1.3.1:2003 is a Slovenian standard identical to the European Standard EN 300 659-2 V1.3.1, developed by the Slovenian Institute for Standardization (SIST). This standard defines the subscriber line protocol for analogue access to the Public Switched Telephone Network (PSTN), specifically addressing off-hook data transmission over the local loop. Its primary focus is supporting display services-including Calling Line Identification Presentation (CLIP) and other related services-while the subscriber's telephone is in the off-hook state. The document is essential for telecommunications manufacturers, service providers, and integrators who enable advanced caller information and supplementary services over traditional PSTN infrastructure.
Key Topics
Off-hook Data Transmission Protocol
The standard specifies how data is transmitted from the local exchange to the terminal equipment (TE), using asynchronous voice-band Frequency Shift Keying (FSK) signaling when the telephone line is off-hook.Support for Display Services
The protocol enables the delivery of display-related services such as incoming caller identification, call waiting information, and similar features during active calls.Signaling Procedures
Key events define the off-hook data sequence:- Blocking the speech path during data signaling to prevent interference.
- Transmission of a Dual Tone-Alerting Signal (DT-AS) indicating incoming data.
- Terminal equipment must respond with a TE-Acknowledgement Signal (TE-ACK), specifically DTMF "D".
- On acknowledgment, the exchange sends the FSK-modulated information, then restores the speech path.
Timing and Tolerance Requirements
The protocol sets precise intervals for speech path blocking, DT-AS signaling, ACK detection, and data modulation, ensuring compatibility and interoperability across analogue telephone devices.Data Encoding
Data encoding for the transmission process references companion standard EN 300 659-3, ensuring standardized formatting for all PSTN display services.
Applications
Calling Line Identification Presentation (CLIP)
Enables delivery and display of caller ID information during active calls, increasing call transparency and enhancing user experience.Call Waiting and Supplementary Services
Supports notification and identification of additional incoming calls while the line is in use, without interrupting the current session.Analogue Terminal Equipment Compatibility
Ensures that a wide range of analogue phones, fax machines, and caller display units are interoperable with modern PSTN services that rely on user information display.Integration with PSTN Networks
Facilitates migration or coexistence of legacy analogue systems with digital enhancements, allowing network operators to offer advanced features over existing infrastructure.
Related Standards
SIST EN 300 659-1
Subscriber line protocol for on-hook data transmission associated with display services.SIST EN 300 659-3
Describes data link message and parameter codings for the local loop.ETSI ES 201 235
Specification for DTMF transmitters and receivers, referenced for acknowledgement signaling.ETSI TR 101 182
Provides terminology and definitions for analogue terminals and access.
Practical Value
Implementing SIST EN 300 659-2 V1.3.1:2003 allows telecommunications operators and equipment manufacturers to ensure reliable, standards-based transmission of display and related data services over analogue PSTN lines. Compliance guarantees interoperability, service consistency, and enhanced customer satisfaction by supporting caller information delivery and other advanced features-even during ongoing calls. As legacy PSTN networks continue to serve in many regions, adherence to this standard is crucial for innovation and value addition in analogue networking environments.
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Frequently Asked Questions
SIST EN 300 659-2 V1.3.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services; Part 2: Off-hook data transmission". This standard covers: Definition of the protocol for off hook data transmission on analogue lines required to support display services such as Calling Line Identification Presentation for the PSTN.
Definition of the protocol for off hook data transmission on analogue lines required to support display services such as Calling Line Identification Presentation for the PSTN.
SIST EN 300 659-2 V1.3.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.040.35 - Telephone networks. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 659-2 V1.3.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2003
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Access and Terminals (AT); Analogue access to the Public Switched Telephone Network
(PSTN); Subscriber line protocol over the local loop for display (and related) services;
Part 2: Off-hook data transmission
Ta slovenski standard je istoveten z: EN 300 659-2 Version 1.3.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
European Standard (Telecommunications series)
Access and Terminals (AT);
Analogue access to the
Public Switched Telephone Network (PSTN);
Subscriber line protocol over the local loop for
display (and related) services;
Part 2: Off-hook data transmission
2 ETSI EN 300 659-2 V1.3.1 (2001-01)
Reference
REN/AT-030006-2
Keywords
data, PSTN, protocol, service
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No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2001.
All rights reserved.
ETSI
3 ETSI EN 300 659-2 V1.3.1 (2001-01)
Contents
Intellectual Property Rights .4
Foreword.4
1 Scope.5
2 References.5
3 Definitions and abbreviations.5
3.1 Definitions . 5
3.2 Abbreviations. 5
4 Data Encoding.6
5 Protocol Requirements.6
5.1 Presentation Layer. 6
5.2 Data-link Layer . 6
5.3 Physical Layer. 6
6 Data transmission requirements: signalling, timing and tolerance .6
6.1 Off-hook data transmission. 6
6.1.1 TAS physical characteristics. 8
6.1.2 Timing. 8
6.1.3 TE-Acknowledgement Signal. 8
History .9
ETSI
4 ETSI EN 300 659-2 V1.3.1 (2001-01)
Intellectual Property Rights
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Essential to certain aspects of the present document. The owner of this patent has undertaken to grant irrevocable
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Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Access and
Terminals (AT).
Version 1.2.1 of the present document had been submitted to One-step Approval Procedure 200017 but was withdrawn
due to the receipt of substantial technical comments.
The present document is part 2 of a multi-part standard covering the PSTN subscriber line protocol over the local loop
for display (and related) services, as described below:
Part 1: "On-hook data transmission";
Part 2: "Off-hook data transmission";
Part 3: "Data link message and parameter codings".
National transposition dates
Date of adoption of this EN: 12 January 2001
Date of latest announcement of this EN (doa): 30 April 2001
Date of latest publication of new National Standard
...