SIST ETS 300 444 E1:2003

• Abstract:

  Based on the ETS 300 175 (DECT CI), to develop a Generic Access Profile (GAP). This profile shall consist of protocol functions that are common to get access to different fixed networks with the provision of mobility. The profile shall have a focus on speech.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.060.20 - Receiving and transmitting equipment
• ICS: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: T-317
• Ref Project: ETSI ETS 300 444 ed.1 (1995-12) - Digital Enhanced Cordless Telecommunications (DECT); Generic Access Profile (GAP)

Overview

SIST ETS 300 444 E1:2003 outlines the Generic Access Profile (GAP) for Digital Enhanced Cordless Telecommunications (DECT) systems within the broader framework of Radio Equipment and Systems (RES) standards. Developed by the Slovenian Institute for Standardization (SIST) and harmonized with the ETSI technical baseline, this standard establishes a universal profile for accessing different fixed networks while providing robust mobility, with a main focus on speech services. By defining essential protocol functions, GAP ensures seamless interoperability between various DECT devices and fixed network infrastructures.

Key Topics

• Interoperability: GAP enables consistent communication and operation between DECT Portable Parts (PP) and Fixed Parts (FP) from different manufacturers, simplifying deployment in multi-vendor environments.
• Mobility Management: The standard addresses protocol requirements necessary to support user mobility across different fixed networks, while maintaining service continuity for voice communications.
• Basic Speech Services: Emphasis is placed on speech as the primary application supported by GAP, ensuring reliable audio transmission and core telephony feature support.
• Protocol Structure: The document specifies network (NWK), data link control (DLC), medium access control (MAC), and physical (PHL) layer service requirements to facilitate the exchange and management of calls, user authentication, registration, and encryption processes.
• Procedures and Service Definitions: Detailed procedures are included for call setup, handover, call release, authentication, location registration, key management, and error handling to guarantee secure and efficient operation.
• Conformance Guidance: While not mandatory, the standard provides conformance testing guidelines for equipment to ensure compliance and interoperability.

Applications

• Cordless Telephony: GAP serves as the backbone for interoperable cordless voice communication in residential, business, and public environments, such as offices, healthcare institutions, hotels, and factories.
• Multi-Vendor Equipment Integration: By harmonizing protocol requirements, the standard allows end-users and service providers to mix and match DECT handsets and base stations from different suppliers without compatibility issues.
• Fixed Network Access with Mobility: The GAP profile facilitates seamless user movement and call continuity across different access points or network segments-a critical feature for modern mobile workforces and public cordless services.
• Simplified Product Development: Manufacturers can reduce development costs and accelerate market introduction of new DECT devices by adhering to a well-defined, widely recognized interoperability profile.

Related Standards

• ETSI ETS 300 175 Series: The technical foundation for DECT Common Interface (CI) and lower-layer protocols, upon which GAP is based.
• TBR 6 and TBR 10: European Telecommunication Standards relating to general and speech attachment requirements for DECT.
• ISO/IEC 9646-6: Provides the methodology for specifying and testing conformance to protocol profiles.
• SIST ETS 300 175: National equivalent of the DECT base standards in Slovenia.

Practical Value

By conforming to SIST ETS 300 444 E1:2003, organizations benefit from a future-proof, interoperable DECT environment that supports straightforward device replacement, network expansion, and integration of new user features. The profile's focus on essential speech-based functionality ensures a high level of reliability and service quality, making it a mainstay in both enterprise and public DECT deployments. For equipment manufacturers, adherence to GAP opens access to competitive markets and satisfies the growing demand for standardized, flexible wireless telecommunication solutions.

Keywords: Digital Enhanced Cordless Telecommunications, DECT, Generic Access Profile, GAP, radio equipment standard, mobility, interoperability, cordless telephony, SIST ETS 300 444, ETSI standard, wireless communication.

SLOVENSKI STANDARD
01-december-2003
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WHOHNRPXQLNDFLMH'(&7±3URILOJHQHULþQHJDGRVWRSD*$3
Radio Equipment and Systems (RES); Digital Enhanced Cordless Telecommunications
(DECT); Generic Access Profile (GAP)
Ta slovenski standard je istoveten z: ETS 300 444 Edition 1
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 444
TELECOMMUNICATION December 1995
STANDARD
Source: ETSI TC-RES Reference: DE/RES-03023
ICS: 33.020, 33.060.50
Key words: DECT, GAP
Radio Equipment and Systems (RES);
Digital European Cordless Telecommunications (DECT);
Generic Access Profile (GAP)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: 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 1995. All rights reserved.

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ETS 300 444: December 1995
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 444: December 1995
Contents
Foreword .9
1 Scope .11
2 Normative references.11
3 Definitions, abbreviations and symbols.12
3.1 DECT definitions.12
3.2 Abbreviations .15
3.3 Symbols .16
4 Feature definitions.17
4.1 NetWorK (NWK) features .17
4.2 Application features .18
5 Service definitions .19
5.1 DLC service definitions .19
5.2 MAC service definitions .19
6 Inter-operability requirements.20
6.1 General .20
6.2 NWK features .21
6.3 DLC services.22
6.4 MAC services.22
6.5 PHysicaL (PHL) layer services .23
6.6 Application features .23
6.7 NWK feature to procedure mapping.23
6.8 Service to procedure mapping.26
6.8.1 DLC service to procedure mapping.26
6.8.2 MAC service to procedure mapping.27
6.8.3 Application feature to procedure mapping.28
6.9 General requirements .28
6.9.1 NWK layer message contents.28
6.9.2 Transaction identifier.28
6.9.3 Length of a NWK layer message .28
6.9.4 Handling of error and exception conditions.28
6.9.5 GAP default set-up attributes .29
6.9.6 Coexistence of MM and CC procedures .29
6.9.7 Coding rules for information elements .29
7 Procedure description .29
8 NWK layer procedures .30
8.1 Summary of outgoing call messages, normal cases .30
8.2 Outgoing call request.31
8.2.1 Associated procedures.32
8.2.1.1 Timer P- management .32
8.2.2 Exceptional cases .32
8.2.2.1 Timer P- expiry.32
8.2.2.2 PT releases the outgoing call request .33
8.2.2.3 FT rejects the outgoing call request .33
8.3 Overlap sending.34
8.3.1 Associated procedure.34
8.3.1.1 Timer F- management .34
8.3.2 Exceptional cases .35
8.3.2.1 PT releases the outgoing call request .35

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ETS 300 444: December 1995
8.3.2.2 FT rejects the outgoing call request. 35
8.3.2.3 Timer F- expiry . 35
8.3.2.4 FT releases the outgoing call request. 36
8.4 Outgoing call proceeding. 36
8.4.1 Exceptional cases. 37
8.4.1.1 PT releases the outgoing call request. 37
8.4.1.2 FT releases the outgoing call request. 37
8.5 Outgoing call confirmation. 38
8.5.1 Exceptional cases. 38
8.5.1.1 PT releases the outgoing call request. 38
8.5.1.2 FT releases the outgoing call request. 38
8.6 Outgoing call connection. 39
8.7 Normal call release . 39
8.7.1 Associated procedures . 41
8.7.1.1 Timer P- management. 41
8.7.1.2 Timer F- management. 41
8.7.2 Exceptional cases. 41
8.7.2.1 Release collisions . 41
8.7.2.2 Timer F- expiry . 42
8.7.2.3 Timer P- expiry . 42
8.8 Abnormal call release.43
8.9 Partial release . 43
8.10 Sending keypad information. 44
8.11 Summary of incoming call related messages, normal cases. 45
8.12 Incoming call request . 46
8.12.1 Associated procedure. 47
8.12.1.1 Timer F- management. 47
8.12.2 Exceptional cases. 47
8.12.2.1 FT releases the incoming call request . 47
8.12.2.2 PT rejects the incoming call request. 48
8.12.2.3 Timer F- expiry . 48
8.13 Incoming call confirmation. 49
8.13.1 Exceptional cases. 49
8.13.1.1 FT releases the incoming call transaction. 49
8.13.1.2 PT releases the incoming call transaction . 49
8.14 PT alerting. 50
8.15 Incoming call connection. 51
8.15.1 Associated procedure. 51
8.15.1.1 Timer P- management. 51
8.15.2 Exceptional cases. 51
8.15.2.1 FT releases the incoming call transaction. 51
8.15.2.2 PT releases the incoming call transaction . 52
8.15.2.3 Timer P- expiry . 52
8.16 Display. 53
8.17 Terminal capability indication . 53
8.18 Internal call set-up. 54
8.19 Internal call keypad . 55
8.20 Service call set-up. 55
8.21 Service call keypad . 55
8.22 Identification of PP . 55
8.22.1 Associated procedure. 57
8.22.1.1 Timer F- management . 57
8.22.2 Exceptional cases. 57
8.22.2.1 Identity not existing in the PT . 57
8.22.2.2 Timer F- expiry. 57
8.23 Authentication of FT . 57
8.23.1 Associated procedure. 58
8.23.1.1 Timer P- management. 58
8.23.2 Exceptional cases. 58
8.23.2.1 Authentication algorithm/key not supported. 58
8.23.2.2 Authentication challenge RES has wrong value . 59
8.23.2.3 Timer P- expiry. 59
8.24 Authentication of PP. 59

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ETS 300 444: December 1995
8.24.1 Associated procedure.60
8.24.1.1 Timer F- management.60
8.24.2 Exceptional cases .61
8.24.2.1 Authentication algorithm/key not supported.61
8.24.2.2 Timer F- expiry .61
8.25 Authentication of user .61
8.25.1 Associated procedure.62
8.25.1.1 Timer F- management.62
8.25.2 Exceptional cases .62
8.25.2.1 Authentication algorithm/key not supported.62
8.25.2.2 Timer F- expiry .62
8.26 Incrementing the ZAP value.62
8.27 Storing the DCK.63
8.28 Location registration.63
8.28.1 Associated procedures.65
8.28.1.1 Timer P- management.65
8.28.1.2 Timer F- management.66
8.28.2 Exceptional cases .66
8.28.2.1 FT rejects the location registration procedure .66
8.28.2.2 Failure of location registration procedure .66
8.28.2.3 PT rejects the identity assignment.66
8.28.2.4 Timer F- expiry .67
8.29 Location update .67
8.30 Obtaining access rights .68
8.30.1 Associated procedure.70
8.30.1.1 Timer P- management .70
8.30.2 Exceptional cases .70
8.30.2.1 FT rejects the access rights .70
8.30.2.2 Timer P- expiry.70
8.31 FT terminating access rights.70
8.31.1 Associated procedure.71
8.31.1.1 Timer F- management .71
8.31.2 Exceptional cases .72
8.31.2.1 PT rejects the termination request.72
8.31.2.2 Timer F- expiry.72
8.32 Key allocation.72
8.32.1 Associated procedures.73
8.32.1.1 Timer F- management .73
8.32.1.2 Timer P- management .74
8.32.2 Exceptional cases .74
8.32.2.1 Timer F- expiry.74
8.32.2.2 Timer P- expiry .74
8.32.2.3 Allocation-type element is unacceptable .74
8.32.2.4 Authentication of PT fails.75
8.32.2.5 Authentication of FT fails .75
8.33 Cipher-switching initiated by FT.75
8.33.1 Associated procedure.76
8.33.1.1 Timer F- management.76
8.33.2 Exceptional cases .76
8.33.2.1 PT rejects the cipher request.76
8.33.2.2 Timer F- expiry .77
8.34 Cipher-switching initiated by PT.77
8.34.1 Associated procedure.78
8.34.1.1 Timer P- management.78
8.34.2 Exceptional cases .79
8.34.2.1 FT rejects the cipher request.79
8.34.2.2 Timer P- expiry .79
8.35 Indirect FT initiated link establishment.79
8.35.1 Associated procedure.81
8.35.1.1 Timer F- management.81
8.35.2 Exceptional cases .81
8.35.2.1 The IPUI received in the {LCE-PAGE-RESPONSE} does
not match.81

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ETS 300 444: December 1995
8.35.2.2 Timer expiry . 82
8.35.2.3 Release from the higher entity . 82
8.36 Direct PT initiated link establishment . 82
8.36.1 Exceptional case. 84
8.36.1.1 Link establishment failure . 84
8.37 Link release "normal" . 84
8.37.1 Associated procedure. 85
8.37.1.1 Timer management . 85
8.37.2 Exceptional cases. 86
8.37.2.1 Timer expiry . 86
8.37.2.2 Outstanding data has been discarded . 86
8.38 Link release "abnormal" . 87
8.39 Link release "maintain". 87
8.39.1 Associated procedure. 87
8.39.1.1 Timer management . 87
9 DLC layer procedures. 88
9.1 Class A link establishment . 88
9.1.1 Associated procedures . 90
9.1.1.1 Timer P management . 90
9.1.1.2 Re-transmission counter management. 90
9.1.1.3 Multiple frame operation variables management. 90
9.1.1.4 Lower Layer Management Entity (LLME) establishment of
a MAC connection. 91
9.1.2 Exceptional cases. 92
9.1.2.1 Timer P expiry . 92
9.1.2.2 Receipt of a request for link release . 92
9.1.2.3 Receipt of an indication for a connection release . 92
9.2 Class A Acknowledged Information transfer . 92
9.2.1 Acknowledgement with an I_frame. 93
9.2.2 Acknowledgement with a RR_frame . 95
9.2.3 Class A acknowledged information transfer with segment reassemble . 96
9.2.4 Associated procedures . 96
9.2.4.1 Timer management. 96
9.2.4.2 Re transmission timer management. 96
9.2.4.3 Multiple frame operation variables management. 96
9.2.5 Exceptional cases. 96
9.2.5.1 Timer expiry. 96
9.2.5.2 Receipt of a request for link release . 97
9.2.5.3 Receipt of an indication for a connection release . 97
9.2.5.4 DLC wants to make a connection handover . 97
9.3 Class A link release. 97
9.3.1 Associated procedures . 97
9.3.1.1 LLME U-plane release . 97
9.3.1.2 LLME release a MAC connection. 97
9.4 Class A link re-establishment. 98
9.5 Cs channel fragmentation and recombination. 98
9.6 Normal broadcast. 98
9.7 Class A basic connection handover . 99
9.7.1 Voluntary handover. 99
9.7.2 Associated procedure. 99
9.7.2.1 LLME connection handover management . 99
9.7.3 Exceptional case. 100
9.7.3.1 Receipt of a request for link release . 100
9.8 Encryption switching. 100
9.8.1 Associated procedure. 100
9.8.1.1 Providing Encryption key to the MAC layer . 100
9.8.2 Exceptional cases. 100
9.8.2.1 Encryption fails. 100
9.8.2.2 Connection handover of ciphered connections. 101
9.9 U-plane class 0/min delay . 101
9.9.1 Associated procedure. 101
9.9.1.1 LLME U-plane establishment. 101

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ETS 300 444: December 1995
9.10 FU1 frame operation.101
10 MAC layer procedures.102
10.1 General .102
10.2 Downlink broadcast.102
10.2.1 N message .102
t
10.2.2 Q - static system information.103
t
10.2.3 Q - FP capabilities .103
t
10.2.4 Q - SARI list contents.103
t
10.3 Paging broadcast.104
10.3.1 Short page, normal/extended paging .104
10.3.2 Zero page normal/extended paging .105
10.3.3 Blind slot information.105
10.3.4 Bearer handover information.105
10.4 Set-up of basic connection, basic bearer set-up (A-field).106
10.4.1 M message.106
t
10.4.2 Associated procedures.107
10.4.2.1 Timer T200 management.107
10.4.2.2 Counter N200 management .107
10.4.3 Exceptional cases .107
10.4.3.1 Bearer set-up fails .107
10.4.3.2 Timer T200 expiry.108
10.5 Connection/bearer release.108
10.5.1 M message.108
t
10.6 Bearer handover request .109
10.6.1 M message.109
t
10.7 Connection handover request.109
10.7.1 M message.109
t
10.8 Cs channel data.109
10.9 Q2 bit setting.109
10.10 RFPI handshake .110
10.11 Antenna diversity.110
10.12 Sliding collision .110
10.13 Encryption process - initialisation and synchronisation.110
10.14 Encryption mode control .110
10.14.1 M message.110
t
10.15 Handover encryption process .111
10.16 Extended frequency allocation.111
11 PHL layer requirements.111
11.1 General .111
11.2 Minimum Normal Transmit Power (NTP).111
11.3 Radio receiver sensitivity .111
11.4 Z-field.112
11.5 Sliding collision detection.112
11.6 Physical channel availability.112
11.7 Synchronisation window.112
12 Requirements regarding the speech transmission.112
12.1 General .112
12.2 User controlled volume control .112
13 Management procedures .112
13.1 Management of MM procedures.112
13.2 Location registration initiation .113
13.3 Assigned individual TPUI management.113
13.4 PMID management.113
13.5 DCK management .113
13.6 Broadcast attributes management.114
13.7 Storage of subscription related data .114
14 Application procedures.115
14.1 Subscription control .115

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ETS 300 444: December 1995
14.2 AC to bitstring mapping. 115
14.3 Manual entry of the PARK. 115
Annex A (informative): PP locking procedure for on-air subscription. 117
Annex B (informative): Tones, progress indicator and U-plane connection . 119
B.1 General. 119
B.2 Connection of U-plane and provision of tones. 119
B.3 Provision of tones before connection of the U-plane. 119
B.4 Provision of tones and <> information element. 119
B.5 Summary . 120
Annex C (informative): ETS 300 175 changes . 121
C.1 General. 121
C.2 NWK layer. 121
C.2.1 Error handling. 121
C.2.2 <> and <> information elements. 121
C.2.3 New codings in <> information element. 121
C.2.4 New codings for DECT control codes . 121
C.2.5 <> information element coding. 122
C.2.6 Field naming in <>. 126
C.3 PHL layer . 127
C.3.1 Radio receiver sensitivity. 127
C.3.2 Receiver interference performance. 127
C.3.3 Receiver intermodulation performance . 127
History. 128

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ETS 300 444: December 1995
Foreword
This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Every ETS prepared by ETSI is a voluntary standard. This ETS may contain text concerning conformance
testing of the equipment to which it relates. This text should be considered as guidance only and does not
make this ETS mandatory.
This ETS is based on ETS 300 175-1 to 8 [1] to [8]. General attachment requirements and speech
attachment requirements are based on TBR 6 [10] and TBR 10 [11].
This ETS has been developed in accordance to the rules of documenting a profile specification as
described in ISO/IEC 9646-6 [12].
Transposition dates
Date of adoption of this ETS: 14 July 1995
Date of latest announcement of this ETS (doa): 28 February 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 August 1996
Date of withdrawal of any conflicting National Standard (dow): 31 August 1996

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ETS 300 444: December 1995
Blank page
Page 11
ETS 300 444: December 1995
1 Scope
This ETS specifies that set of technical requirements for Digital European Cordless Telecommunications
(DECT) Fixed Part (FP) and DECT Portable Part (PP) necessary for the support of the Generic Access
Profile (GAP).
The GAP is applicable to all DECT Portable radio Terminations (PT) and Fixed radio Terminations (FT)
which are subject to CTR 10 (i.e. 3,1 kHz telephony teleservice) and specifies the minimum functionality
that is supported by all other 3,1 kHz voice profiles.
The objective of the ETS is to ensure the Air Interface (AI) inter-operability of DECT equipment capable of
3,1 kHz telephony applications, in such a way that any DECT PT conforming to the procedures described
in this ETS is inter-operable with any DECT FT conforming to the procedures described in this ETS.
The profile consists of the minimum mandatory requirements that allow a 3,1 kHz teleservice connection
to be established, maintained and released between a FT and a PT with the appropriate access rights,
irrespective of whether the FP provides residential, business or public access services.
In addition, this ETS defines the features, services, procedures etc. for both the FT and the PT, which are
provision mandatory either in the PT or in the FT, as well as some elements that are provision optional but
still process mandatory.
Mobility Management (MM) procedures at the DECT AI to support incoming calls and outgoing calls are
included.
Inter-working between the FT and the attached network is outside the scope of this ETS.
2 Normative references
This ETS incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 175-1: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 1:
Overview".
[2] ETS 300 175-2: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 2: Physical
(PHL) layer".
[3] ETS 300 175-3: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 3: Medium
Access Control (MAC) layer".
[4] ETS 300 175-4: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data
Link Control (DLC) layer".
[5] ETS 300 175-5: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 5: Network
(NWK) layer".
[6] ETS 300 175-6: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 6:
Identities and addressing".
[7] ETS 300 175-7: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 7: Security
features".
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ETS 300 444: December 1995
[8] ETS 300 175-8: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 8: Speech
coding and transmission".
[9] I-ETS 300 176: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Approval Test Specification (ATS)".
[10] TBR 6: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); General terminal attachment requirements".
[11] TBR 10: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); General terminal attachment requirements:
Telephony applications".
[12] ISO/IEC 9646-6: "Information Technology - Open system Interconnection -
Conformance testing methodology and framework: Protocol profile test
specification".
[13] ISO/IEC 9646-7: "Information Technology - Open system Interconnection -
Conformance testing methodology and framework: Implementation
Conformance Statements".
[14] ISO/IEC 8073 (1992): "Information processing systems - Open System
Interconnection - Connection oriented transport protocol specification".
[15] ISO/IEC 2022 (1994): “Information Technology - Character code structure and
extension techniques”.
[16] ISO/IEC 8859-1 (1987): “Information processing - 8-bit single-byte coded
graphic character sets - Part 1: Latin alphabet No. 1”.
3 Definitions, abbreviations and symbols
3.1 DECT definitions
For the purposes of this ETS the following definitions apply.
attach: The process whereby a PP within the coverage area of a FP to which it has access rights, notifies
this FP that it is operative. The reverse process is detach, which reports the PP as inoperative.
NOTE 1: An operative PP is assumed to be ready to receive calls.
authentication: The process whereby a DECT subscriber is positively verified to be a legitimate user of a
particular FP.
NOTE 2: Authentication is generally performed at call set-up, but may also be done at any other
time (e.g. during a call).
bearer service: A type of telecommunication service that provides a defi
...