SIST EN 300 175-1 V2.7.1:2018

ETSI EN 300 175-1 V2.7.1 (2017-11)






EUROPEAN STANDARD
Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 1: Overview

---------------------- Page: 1 ----------------------
2 ETSI EN 300 175-1 V2.7.1 (2017-11)



Reference
REN/DECT-00307-1
Keywords
7 kHz, audio, broadband, CODEC, DECT,
handsfree, IMT-2000, loudspeaking, mobility,
narrowband, quality, radio, speech, TDD, TDMA,
telephony, terminal
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2017.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M logo is protected for the benefit of its Members.
GSM® and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 300 175-1 V2.7.1 (2017-11)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions, symbols and abbreviations . 8
3.1 Definitions . 8
3.2 Symbols and abbreviations . 17
4 Structure . 24
4.0 General . 24
4.1 Part 1: Overview . 24
4.2 Part 2: Physical Layer (PHL) . 24
4.3 Part 3: Medium Access Control (MAC) layer . 25
4.4 Part 4: Data Link Control (DLC) layer . 25
4.5 Part 5: Network (NWK) layer . 25
4.6 Part 6: Identities and addressing . 25
4.7 Part 7: Security features . 25
4.8 Part 8: Speech and audio coding and transmission . 25
5 The objectives of the CI standard . 26
6 General description of the system . 27
7 Description of the protocol architecture . 28
7.1 General . 28
7.2 The DECT layered structure . 28
7.3 Physical Layer (PHL) . 29
7.4 MAC layer . 29
7.5 DLC layer . 30
7.6 Network (NWK) layer . 30
7.7 Lower Layer Management Entity (LLME) . 30
7.8 Interworking Units (IWU) . 31
8 Proprietary escapes within the CI . 31
8.0 General . 31
8.1 Primary escape routes . 31
8.2 Secondary escape routes . 32
9 Levels of conformance . 32
10 Further development of the DECT standard . 32
10.1 IMT-2000 . 32
10.2 The DECT Packet Radio Service (DPRS) . 32
10.3 DECT in international markets . 33
10.3.0 General . 33
10.3.1 United States of America . 33
10.4 The New Generation DECT (NG-DECT) . 33
10.5 DECT Ultra Low Energy (ULE) . 34
Annex A (informative): Bibliography . 36
Annex B (informative): Change history . 37
History . 38

ETSI

---------------------- Page: 3 ----------------------
4 ETSI EN 300 175-1 V2.7.1 (2017-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Digital Enhanced Cordless
Telecommunications (DECT).
The present document is part 1 of a multi-part deliverable covering the Common Interface (CI) for the Digital Enhanced
Cordless Telecommunications (DECT), as identified below:
Part 1: "Overview";
Part 2: "Physical Layer (PHL)";
Part 3: "Medium Access Control (MAC) layer";
Part 4: "Data Link Control (DLC) layer";
Part 5: "Network (NWK) layer";
Part 6: "Identities and addressing";
Part 7: "Security features";
Part 8: "Speech and audio coding and transmission".
The following aspects of the present document are subject to controlled distribution:
a) DECT identities, as defined in ETSI EN 300 175-6 [6];
b) some DECT cryptographic algorithms.
The cryptographic algorithms subjected to controlled distribution specify the details of the DECT Standard
Authentication Algorithm (DSAA) and the DECT Standard Cipher (DSC). The cryptographic algorithms DECT
Standard Authentication Algorithm #2 (DSAA2) and DECT Standard Cipher #2 (DSC2) are not subjected to controlled
distribution.
These aspects are distributed on an individual basis. Further information and details of the current distribution
procedures can be obtained from the ETSI Secretariat at the address on the second page of the present document.
Further details of the DECT system may be found in ETSI TR 101 178 [i.4], ETSI ETR 043 [i.5] and ETSI
TR 102 185 [i.6].
ETSI

---------------------- Page: 4 ----------------------
5 ETSI EN 300 175-1 V2.7.1 (2017-11)

National transposition dates
Date of adoption of this EN: 25 September 2017
Date of latest announcement of this EN (doa): 31 December 2017
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 June 2018
Date of withdrawal of any conflicting National Standard (dow): 30 June 2019

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

---------------------- Page: 5 ----------------------
6 ETSI EN 300 175-1 V2.7.1 (2017-11)
1 Scope
The present document gives an introduction and overview of the complete Digital Enhanced Cordless
Telecommunications (DECT) Common Interface (CI).
The present document contains an abstract of the other parts of the DECT standard together with a general
description of:
• the objectives of the present document;
• the DECT Common Interface;
• the protocol architecture of DECT.
The present document also provides an extensive vocabulary; in particular it contains the common definitions of all the
technical terms used in different parts of the present document.
The present document includes New Generation DECT, a further development of the DECT standard introducing
wideband speech, improved data services, new slot types and other technical enhancements.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Void.
[2] ETSI EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 2: Physical Layer (PHL)".
[3] ETSI EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 3: Medium Access Control (MAC) layer".
[4] ETSI EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 4: Data Link Control (DLC) layer".
[5] ETSI EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 5: Network (NWK) layer".
[6] ETSI EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 6: Identities and addressing".
[7] ETSI EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 7: Security features".
[8] ETSI EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 8: Speech and audio coding and transmission".
[9] ETSI EN 300 176 (all parts): "Digital Enhanced Cordless Telecommunications (DECT); Test
specification".
ETSI

---------------------- Page: 6 ----------------------
7 ETSI EN 300 175-1 V2.7.1 (2017-11)
[10] Recommendation ITU-R M.1457-11: "Detailed specifications of the terrestrial radio interfaces of
International Mobile Telecommunications-2000 (IMT-2000)".
[11] ETSI EN 301 649: "Digital Enhanced Cordless Telecommunications (DECT); DECT Packet
Radio Service (DPRS)".
[12] ETSI TS 102 497: "Digital Enhanced Cordless Telecommunications (DECT); DECT in the
1 920 MHz to 1 930 MHz Unlicensed Personal Communications Services (UPCS) frequency
band; Specific requirements".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 300 403-1: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control;
Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]".
[i.2] Recommendation ITU-R SM.1046-2: "Definition of spectrum use and efficiency of a radio
system".
[i.3] Recommendation ITU-R M.816-1: "Framework for services supported on International Mobile
Telecommunications-2000 (IMT-2000)".
[i.4] ETSI TR 101 178: "Digital Enhanced Cordless Telecommunications (DECT); A High Level Guide
to the DECT Standardization".
[i.5] ETSI ETR 043: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface
(CI); Services and facilities requirements specification".
[i.6] ETSI TR 102 185: "Digital Enhanced Cordless Telecommunications (DECT); Data Services
Profile (DSP); Profile overview".
[i.7] ETSI ETR 310: "Digital Enhanced Cordless Telecommunications (DECT); Traffic capacity and
spectrum requirements for multi-system and multi-service DECT applications co-existing in a
common frequency band".
[i.8] ETSI TS 102 265: "Digital Enhanced Cordless Telecommunications (DECT); DECT access to IP
networks".
[i.9] Recommendation ITU-T P.311: "Transmission characteristics for wideband (150-7000 Hz) digital
handset telephones".
[i.10] ETSI TR 102 570: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Overview and Requirements".
[i.11] ETSI TS 102 527-1: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 1: Wideband Speech".
[i.12] ETSI TS 102 527-2: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 2: Support of transparent IP packet data".
[i.13] ETSI TS 102 527-3: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 3: Extended wideband speech services".
ETSI

---------------------- Page: 7 ----------------------
8 ETSI EN 300 175-1 V2.7.1 (2017-11)
[i.14] ETSI TS 102 527-4: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 4: Light Data Services; Software Update Over The Air (SUOTA), content
downloading and HTTP based applications".
[i.15] ETSI TS 102 527-5: " Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 5: Additional feature set nr. 1 for extended wideband speech services".
[i.16] Recommendation ITU-T V.42: "Error-correcting procedures for DCEs using asynchronous-to-
synchronous conversion".
[i.17] Recommendation ITU-T V.24: "List of definitions for interchange circuits between Data Terminal
Equipment (DTE) and data circuit-terminating equipment (DCE)".
[i.18] ETSI TS 102 939-1: "Digital Enhanced Cordless Telecommunications (DECT); Ultra Low Energy
(ULE); Machine to Machine Communications; Part 1: Home Automation Network (phase 1)".
[i.19] ETSI TS 102 939-2: "Digital Enhanced Cordless Telecommunications (DECT); Ultra Low Energy
(ULE); Machine to Machine Communications; Part 2: Home Automation Network (phase 2)".
[i.20] IEEE 802.11-2012™: "IEEE Standard for Information technology--Telecommunications and
information exchange between systems Local and metropolitan area networks--Specific
requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
Specifications".
[i.21] Recommendation ITU-T G.722 (2012): "7 kHz audio-coding within 64 kbit/s".
[i.22] Recommendation ITU-T G.729.1 (2006): "G.729-based Embedded Variable bit-rate coder: An
8-32 kbit/s scalable wideband coder bitstream interoperable with G.729".
[i.23] ISO/IEC 14496-3:2009: "Information technology -- Coding of audio-visual objects --
Part 3: Audio" (ISO/IEC JTC1/SC29/WG11 (MPEG)).
[i.24] IETF RFC 3261: "SIP: Session Initiation Protocol".
[i.25] Recommendation ITU-T H.323: "Packet-based multimedia communications systems".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Access Rights Class (ARC): type of access to a DECT network, such as public, residential or private
Access Rights Details (ARD): unique number within one ARC
Access Rights Identity (ARI): globally unique identity that shows the access rights related to a service provider
NOTE: PARI = Primary ARI;
SARI = Secondary ARI;
TARI = Tertiary ARI.
algorithm: mathematical process or function that transforms an input into an output
algorithm identifier: designator to show which algorithm is in use, so that the correct one may be chosen
antenna diversity: diversity implies that the Radio Fixed Part (RFP) for each bearer independently can select different
antenna properties such as gain, polarization, coverage patterns and other features that may affect the practical coverage
NOTE: A typical example is space diversity, provided by two vertically polarized antennas separated by 10 cm to
20 cm.
asymmetric algorithm: See public key algorithm.
ETSI

---------------------- Page: 8 ----------------------
9 ETSI EN 300 175-1 V2.7.1 (2017-11)
attach: process whereby a Portable Part (PP) within the coverage area of a Fixed Part (FP) to which it has access rights,
notifies the FP that it is operative
authentication: corroboration that an entity is the one that is claimed
authentication of Fixed radio Termination (FT): process whereby the identity of an FT is verified to a DECT PT
authentication of Portable radio Termination (PT): process whereby a DECT PT is positively verified to be a
legitimate user of a particular FP
authentication (of a subscriber): process whereby a DECT subscriber is positively verified to be a legitimate user of a
particular FP
authentication of user: process whereby a DECT user is positively verified to be a legitimate user of a particular FP
bearer: See Medium Access Control (MAC) bearer or bearer service.
bearer handover: internal handover process provided by the MAC layer, whereby one MAC connection can modify its
underlying bearers while maintaining the service provided to the Data Link Control (DLC) layer
bearer service: type of telecommunication service that provides a defined capability for the transmission of signals
between user-network interfaces
broadcast: simplex point-to-multipoint mode of transmission
C-plane: control plane of the DECT protocol stacks, which contains all of the internal DECT protocol control, but may
also include some external user information
call: all of the Network (NWK) layer processes involved in one NWK layer peer-to-peer association
cell: domain served by a single antenna(e) system (including a leaky feeder) of one FP
Central Control Fixed Part (CCFP): physical grouping that contains the central elements of a FP
centrex: implementation of a private telecommunication network exchange that is not located on the premises of the
private network operator
Cipher Block Chaining Message Authentication Code (CBC-MAC): cryptographic technique for constructing a
message authentication code from a block cipher
Cipher Key (CK): value that is used to determine the transformation of plaintext to ciphertext in a cryptographic
algorithm
Cipher Key (CK) generation: process for generating cryptographic keys
ciphertext: output of a cryptographic algorithm
channel: See physical channel.
cluster: logical grouping of one or more cells between which bearer handover is possible
confidentiality: rendering information secret as ciphertext unless the capability is possessed to recover the plaintext
from ciphertext
connection: See MAC connection.
connection handover: internal handover process provided by the DLC layer, whereby one set of DLC entities (C-plane
and U-plane) can re-route data from one MAC connection to a second new MAC connection, while maintaining the
service provided to the NWK layer
ConnectionLess mode (C/L): transmission mode that transfers one packet (one self-contained unit) of data from one
source point to one (or more) destination points in a single phase
Connection Oriented mode (C/O): transmission mode that transfers data from one source point to one or more
destination points using a protocol based on three phases:
• "Set-up";
ETSI

---------------------- Page: 9 ----------------------
10 ETSI EN 300 175-1 V2.7.1 (2017-11)
• "Data transfer"; and
• "Release".
Cordless Radio Fixed Part (CRFP): Wireless Relay Station (WRS) that provides independent bearer control to a PT
and FT for relayed connections
Counter with CBC-MAC (CCM): authenticated encryption algorithm designed to provide both authentication and
confidentiality
countermeasure: device, instrument or procedure used to counteract or defend against a threat
coverage area: area over which reliable communication can be established and maintained
cryptography: secret writing
Data Encryption Standard (DES): United States Federal data encryption standard
Data Link Control (DLC): layer 2b of the DECT protocol stack
decipherment: rendering of ciphertext into plaintext
DECT NetWork (DNW): network that uses the DECT air interface to interconnect a local network to one or more
portable applications
DECT Standard Authentication Algorithm (DSAA): algorithm used for authentication in DECT
DECT Standard Authentication Algorithm #2 (DSAA2): algorithm used for authentication in DECT
DECT Standard Cipher (DSC): algorithm used for data encryption in DECT
DECT Standard Cipher #2 (DSC2): algorithm used for data encryption in DECT
Default Cipher Key (DefCK): Derived Cipher Key (DCK) that is stored in both FP and PP to be used later by MAC to
immediately encrypt with connection establishment
Derived Cipher Key (DCK): Cipher Key (CK) that is established as part of the procedure used to authenticate the PT
distributed communication: ability of a DECT terminal to provide means for or assist direct communication between
any two terminals, members of a "closed" local DECT network
DLC broadband data link: link that can be associated with a logical MAC connection comprising a number of MAC
(physical) connections
DLC broadcast: simplex "connectionless" mode of transmission from the DLC broadcast entity of one FT to the DLC
broadcast entities in one or more PT
DLC data link (DLC link): association between two DLC layer entities
DLC frame: format used to structure all messages that are exchanged between DLC layer peer entities
double duplex bearer: use of two duplex bearers (see duplex bearer) which refer to the same MAC connection, sharing
their simplex bearers (see simplex bearer) for the information flow
double-simplex bearer: use of two simplex bearers operating in the same direction on two physical channels
th
double slot: one 12 of a TDMA frame which is used to support one high capacity physical channel
down-link: transmission in the direction FT to PT
duplex bearer: use of two simplex bearers operating in opposite directions on two physical channels
encipherment: rendering of plaintext into ciphertext
End System (ES): logical grouping that contains application processes and supports telecommunication services
ETSI

---------------------- Page: 10 ----------------------
11 ETSI EN 300 175-1 V2.7.1 (2017-11)
expedited (messages, procedures, operations): MAC C/O operations (messages, procedures, operations) intended for
ultra-fast setup and release of bearers, allowing in most cases reduction in the number of messages and early or late
U-plane transmission compared to regular procedures
expedited connections: advanced connections able to use the expedited messages of the advanced connection control
part 2 set and their associate procedures for bearer setup and release
extended MAC control messages: MAC messages of the B-field connection control set
external handover: process of switching a call in progress from one FP to another FP
Fast Encryption Algorithm (FEAL algorithm): particular encryption algorithm in the public domain
field: continuous region of data (i.e. adjacent bits) that jointly convey information
fixed geometry Portable Part (PP): PP in which the electro-acoustic transducers and their associated acoustic
components are held in fixed rel
...

Draft ETSI EN 300 175-1 V2.6.6 (2017-06)






EUROPEAN STANDARD
Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 1: Overview

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)



Reference
REN/DECT-00307-1
Keywords
7 kHz, audio, broadband, CODEC, DECT,
handsfree, IMT-2000, loudspeaking, mobility,
narrowband, quality, radio, speech, TDD, TDMA,
telephony, terminal
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2017.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M logo is protected for the benefit of its Members
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions, symbols and abbreviations . 8
3.1 Definitions . 8
3.2 Symbols and abbreviations . 17
4 Structure . 24
4.0 General . 24
4.1 Part 1: Overview . 24
4.2 Part 2: Physical Layer (PHL) . 24
4.3 Part 3: Medium Access Control (MAC) layer . 24
4.4 Part 4: Data Link Control (DLC) layer . 25
4.5 Part 5: Network (NWK) layer . 25
4.6 Part 6: Identities and addressing . 25
4.7 Part 7: Security features . 25
4.8 Part 8: Speech and audio coding and transmission . 25
5 The objectives of the CI standard . 26
6 General description of the system . 27
7 Description of the protocol architecture . 28
7.1 General . 28
7.2 The DECT layered structure . 28
7.3 Physical Layer (PHL) . 29
7.4 MAC layer . 29
7.5 DLC layer . 30
7.6 Network (NWK) layer . 30
7.7 Lower Layer Management Entity (LLME) . 30
7.8 Interworking Units (IWU) . 31
8 Proprietary escapes within the CI . 31
8.0 General . 31
8.1 Primary escape routes . 31
8.2 Secondary escape routes . 32
9 Levels of conformance . 32
10 Further development of the DECT standard . 32
10.1 IMT-2000 . 32
10.2 The DECT Packet Radio Service (DPRS) . 32
10.3 DECT in international markets . 33
10.3.0 General . 33
10.3.1 United States of America . 33
10.4 The New Generation DECT (NG-DECT) . 33
10.5 DECT Ultra Low Energy (ULE) . 34
Annex A (informative): Bibliography . 36
Annex B (informative): Change history . 37
History . 38

ETSI

---------------------- Page: 3 ----------------------
4 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Digital Enhanced Cordless
Telecommunications (DECT), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
standards EN Approval Procedure.
The present document is part 1 of a multi-part deliverable covering the Common Interface (CI) for the Digital Enhanced
Cordless Telecommunications (DECT), as identified below:
Part 1: "Overview";
Part 2: "Physical Layer (PHL)";
Part 3: "Medium Access Control (MAC) layer";
Part 4: "Data Link Control (DLC) layer";
Part 5: "Network (NWK) layer";
Part 6: "Identities and addressing";
Part 7: "Security features";
Part 8: "Speech and audio coding and transmission".
The following aspects of the present document are subject to controlled distribution:
a) DECT identities, as defined in ETSI EN 300 175-6 [6];
b) some DECT cryptographic algorithms.
The cryptographic algorithms subjected to controlled distribution specify the details of the DECT Standard
Authentication Algorithm (DSAA) and the DECT Standard Cipher (DSC). The cryptographic algorithms DECT
Standard Authentication Algorithm #2 (DSAA2) and DECT Standard Cipher #2 (DSC2) are not subjected to controlled
distribution.
These aspects are distributed on an individual basis. Further information and details of the current distribution
procedures can be obtained from the ETSI Secretariat at the address on the second page of the present document.
Further details of the DECT system may be found in ETSI TR 101 178 [i.4], ETSI ETR 043 [i.5] and ETSI TR 102 185
[i.6].

ETSI

---------------------- Page: 4 ----------------------
5 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

---------------------- Page: 5 ----------------------
6 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
1 Scope
The present document gives an introduction and overview of the complete Digital Enhanced Cordless
Telecommunications (DECT) Common Interface (CI).
The present document contains an abstract of the other parts of the DECT standard together with a general
description of:
• the objectives of the present document;
• the DECT Common Interface;
• the protocol architecture of DECT.
The present document also provides an extensive vocabulary; in particular it contains the common definitions of all the
technical terms used in different parts of the present document.
The present document includes New Generation DECT, a further development of the DECT standard introducing
wideband speech, improved data services, new slot types and other technical enhancements.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Void.
[2] ETSI EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 2: Physical Layer (PHL)".
[3] ETSI EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 3: Medium Access Control (MAC) layer".
[4] ETSI EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 4: Data Link Control (DLC) layer".
[5] ETSI EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 5: Network (NWK) layer".
[6] ETSI EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 6: Identities and addressing".
[7] ETSI EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 7: Security features".
[8] ETSI EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 8: Speech and audio coding and transmission".
[9] ETSI EN 300 176 (all parts): "Digital Enhanced Cordless Telecommunications (DECT); Test
specification".
ETSI

---------------------- Page: 6 ----------------------
7 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
[10] Recommendation ITU-R M.1457-11: "Detailed specifications of the terrestrial radio interfaces of
International Mobile Telecommunications-2000 (IMT-2000)".
[11] ETSI EN 301 649: "Digital Enhanced Cordless Telecommunications (DECT); DECT Packet
Radio Service (DPRS)".
[12] ETSI TS 102 497: "Digital Enhanced Cordless Telecommunications (DECT); DECT in the
1 920 MHz to 1 930 MHz Unlicensed Personal Communications Services (UPCS) frequency
band; Specific requirements".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 300 403-1: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control;
Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]".
[i.2] Recommendation ITU-R SM.1046-2: "Definition of spectrum use and efficiency of a radio
system".
[i.3] Recommendation ITU-R M.816-1: "Framework for services supported on International Mobile
Telecommunications-2000 (IMT-2000)".
[i.4] ETSI TR 101 178: "Digital Enhanced Cordless Telecommunications (DECT); A High Level Guide
to the DECT Standardization".
[i.5] ETSI ETR 043: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface
(CI); Services and facilities requirements specification".
[i.6] ETSI TR 102 185: "Digital Enhanced Cordless Telecommunications (DECT); Data Services
Profile (DSP); Profile overview".
[i.7] ETSI ETR 310: "Digital Enhanced Cordless Telecommunications (DECT); Traffic capacity and
spectrum requirements for multi-system and multi-service DECT applications co-existing in a
common frequency band".
[i.8] ETSI TS 102 265: "Digital Enhanced Cordless Telecommunications (DECT); DECT access to IP
networks".
[i.9] Recommendation ITU-T P.311: "Transmission characteristics for wideband (150-7000 Hz) digital
handset telephones".
[i.10] ETSI TR 102 570: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Overview and Requirements".
[i.11] ETSI TS 102 527-1: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 1: Wideband Speech".
[i.12] ETSI TS 102 527-2: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 2: Support of transparent IP packet data".
[i.13] ETSI TS 102 527-3: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 3: Extended wideband speech services".
ETSI

---------------------- Page: 7 ----------------------
8 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
[i.14] ETSI TS 102 527-4: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 4: Light Data Services; Software Update Over The Air (SUOTA), content
downloading and HTTP based applications".
[i.15] ETSI TS 102 527-5: " Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 5: Additional feature set nr. 1 for extended wideband speech services".
[i.16] Recommendation ITU-T V.42: "Error-correcting procedures for DCEs using asynchronous-to-
synchronous conversion".
[i.17] Recommendation ITU-T V.24: "List of definitions for interchange circuits between Data Terminal
Equipment (DTE) and data circuit-terminating equipment (DCE)".
[i.18] ETSI TS 102 939-1: "Digital Enhanced Cordless Telecommunications (DECT); Ultra Low Energy
(ULE); Machine to Machine Communications; Part 1: Home Automation Network (phase 1)".
[i.19] ETSI TS 102 939-2: "Digital Enhanced Cordless Telecommunications (DECT); Ultra Low Energy
(ULE); Machine to Machine Communications; Part 2: Home Automation Network (phase 2)".
[i.20] IEEE 802.11-2012™: "IEEE Standard for Information technology--Telecommunications and
information exchange between systems Local and metropolitan area networks--Specific
requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
Specifications".
[i.21] Recommendation ITU-T G.722 (2012): "7 kHz audio-coding within 64 kbit/s".
[i.22] Recommendation ITU-T G.729.1 (2006): "G.729-based Embedded Variable bit-rate coder: An
8-32 kbit/s scalable wideband coder bitstream interoperable with G.729".
[i.23] ISO/IEC 14496-3:2009: "Information technology -- Coding of audio-visual objects --
Part 3: Audio" (ISO/IEC JTC1/SC29/WG11 (MPEG)).
[i.24] IETF RFC 3261: "SIP: Session Initiation Protocol".
[i.25] Recommendation ITU-T H.323: "Packet-based multimedia communications systems".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Access Rights Class (ARC): type of access to a DECT network, such as public, residential or private
Access Rights Details (ARD): unique number within one ARC
Access Rights Identity (ARI): globally unique identity that shows the access rights related to a service provider
NOTE: PARI = Primary ARI;
SARI = Secondary ARI;
TARI = Tertiary ARI.
algorithm: mathematical process or function that transforms an input into an output
algorithm identifier: designator to show which algorithm is in use, so that the correct one may be chosen
antenna diversity: diversity implies that the Radio Fixed Part (RFP) for each bearer independently can select different
antenna properties such as gain, polarization, coverage patterns and other features that may affect the practical coverage
NOTE: A typical example is space diversity, provided by two vertically polarized antennas separated by 10 cm to
20 cm.
asymmetric algorithm: See public key algorithm.
ETSI

---------------------- Page: 8 ----------------------
9 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
attach: process whereby a Portable Part (PP) within the coverage area of a Fixed Part (FP) to which it has access rights,
notifies the FP that it is operative
authentication: corroboration that an entity is the one that is claimed
authentication of Fixed radio Termination (FT): process whereby the identity of an FT is verified to a DECT PT
authentication of Portable radio Termination (PT): process whereby a DECT PT is positively verified to be a
legitimate user of a particular FP
authentication (of a subscriber): process whereby a DECT subscriber is positively verified to be a legitimate user of a
particular FP
authentication of user: process whereby a DECT user is positively verified to be a legitimate user of a particular FP
bearer: See Medium Access Control (MAC) bearer or bearer service.
bearer handover: internal handover process provided by the MAC layer, whereby one MAC connection can modify its
underlying bearers while maintaining the service provided to the Data Link Control (DLC) layer
bearer service: type of telecommunication service that provides a defined capability for the transmission of signals
between user-network interfaces
broadcast: simplex point-to-multipoint mode of transmission
C-plane: control plane of the DECT protocol stacks, which contains all of the internal DECT protocol control, but may
also include some external user information
call: all of the Network (NWK) layer processes involved in one NWK layer peer-to-peer association
cell: domain served by a single antenna(e) system (including a leaky feeder) of one FP
Central Control Fixed Part (CCFP): physical grouping that contains the central elements of a FP
centrex: implementation of a private telecommunication network exchange that is not located on the premises of the
private network operator
Cipher Block Chaining Message Authentication Code (CBC-MAC): cryptographic technique for constructing a
message authentication code from a block cipher
Cipher Key (CK): value that is used to determine the transformation of plaintext to ciphertext in a cryptographic
algorithm
Cipher Key (CK) generation: process for generating cryptographic keys
ciphertext: output of a cryptographic algorithm
channel: See physical channel.
cluster: logical grouping of one or more cells between which bearer handover is possible
confidentiality: rendering information secret as ciphertext unless the capability is possessed to recover the plaintext
from ciphertext
connection: See MAC connection.
connection handover: internal handover process provided by the DLC layer, whereby one set of DLC entities (C-plane
and U-plane) can re-route data from one MAC connection to a second new MAC connection, while maintaining the
service provided to the NWK layer
ConnectionLess mode (C/L): transmission mode that transfers one packet (one self-contained unit) of data from one
source point to one (or more) destination points in a single phase
Connection Oriented mode (C/O): transmission mode that transfers data from one source point to one or more
destination points using a protocol based on three phases:
• "Set-up";
ETSI

---------------------- Page: 9 ----------------------
10 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
• "Data transfer"; and
• "Release".
Cordless Radio Fixed Part (CRFP): Wireless Relay Station (WRS) that provides independent bearer control to a PT
and FT for relayed connections
Counter with CBC-MAC (CCM): authenticated encryption algorithm designed to provide both authentication and
confidentiality
countermeasure: device, instrument or procedure used to counteract or defend against a threat
coverage area: area over which reliable communication can be established and maintained
cryptography: secret writing
Data Encryption Standard (DES): United States Federal data encryption standard
Data Link Control (DLC): layer 2b of the DECT protocol stack
decipherment: rendering of ciphertext into plaintext
DECT NetWork (DNW): network that uses the DECT air interface to interconnect a local network to one or more
portable applications
DECT Standard Authentication Algorithm (DSAA): algorithm used for authentication in DECT
DECT Standard Authentication Algorithm #2 (DSAA2): algorithm used for authentication in DECT
DECT Standard Cipher (DSC): algorithm used for data encryption in DECT
DECT Standard Cipher #2 (DSC2): algorithm used for data encryption in DECT
Default Cipher Key (DefCK): Derived Cipher Key (DCK) that is stored in both FP and PP to be used later by MAC to
immediately encrypt with connection establishment
Derived Cipher Key (DCK): Cipher Key (CK) that is established as part of the procedure used to authenticate the PT
distributed communication: ability of a DECT terminal to provide means for or assist direct communication between
any two terminals, members of a "closed" local DECT network
DLC broadband data link: link that can be associated with a logical MAC connection comprising a number of MAC
(physical) connections
DLC broadcast: simplex "connectionless" mode of transmission from the DLC broadcast entity of one FT to the DLC
broadcast entities in one or more PT
DLC data link (DLC link): association between two DLC layer entities
DLC frame: format used to structure all messages that are exchanged between DLC layer peer entities
double duplex bearer: use of two duplex bearers (see duplex bearer) which refer to the same MAC connection, sharing
their simplex bearers (see simplex bearer) for the information flow
double-simplex bearer: use of two simplex bearers operating in the same direction on two physical channels
th
double slot: one 12 of a TDMA frame which is used to support one high capacity physical channel
down-link: transmission in the direction FT to PT
duplex bearer: use of two simplex bearers operating in opposite directions on two physical channels
encipherment: rendering of plaintext into ciphertext
End System (ES): logical grouping that contains application processes and supports telecommunication services
ETSI

---------------------- Page: 10 ----------------------
11 Draft ETSI EN 300 175-1 V2.6.6 (2017-06)
expedited (messages, procedures, operations): MAC C/O operations (messages, procedures, operations) intended for
ultra-fast setup and release of bearers, allowing in most cases reduction in the number of messages and early or late
U-plane transmission compared to regular procedures
expedited connections: advanced connections able to use the expedited messages of the advanced connection control
part 2 set and their associate procedures for bearer setup and release
extended MAC control messages: MAC messages of the B-field connection control set
external handover: process of switching a call in progress from one FP to another FP
Fast Encryption Algorithm (FEAL algorithm): particular encryption algorithm in the public domain
field: continuous region of data (i.e. adjacent bits) that jointly convey information
fixed geometry Portable Part (PP): PP in which the electro-acoustic transducers and their associated acoustic
components are held in fixed relative positions and/or orientations during all on-line conditions and test conditions of
the PP
Fixed Part (DECT Fixed Part) (FP): physical grouping that contains all of the elements in the DECT network
between the local network and the DECT air interface
Fixed radio Termination (FT): logical group of functions that contai
...