SIST EN 300 757 V1.3.1:2003
(Main)Digital Enhanced Cordless Telecommunications (DECT); Low Rate Messaging Service (LRMS) including Short Messaging Service (SMS)
- Abstract
Alignment with base standards and editorial changes.
- 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
SIST EN 300 757 V1.3.1:2003 is the Slovenian adoption of ETSI EN 300 757 Version 1.3.1 for Digital Enhanced Cordless Telecommunications (DECT) Low Rate Messaging Service (LRMS), including Short Message Service (SMS). It specifies how DECT carries slow acknowledged or unacknowledged messaging, for both point-to-point and point-to-multipoint use, in systems that interwork with fixed infrastructure and roaming services.
What does SIST EN 300 757 V1.3.1:2003 specify?
SIST EN 300 757 V1.3.1:2003 specifies the LRMS bearer and the SMS profile built on top of it. It also defines how the DECT layers, management entities, and interworking functions fit together so messaging can move cleanly across the air interface.
The scope covers:
- slow transfer of multimedia message objects, including SMS
- point-to-point (PTP) and point-to-multipoint (PTM) messaging
- requirements on the Physical (PHY), Medium Access Control (MAC), Data Link Control (DLC), and Network (NWK) layers
- management entity requirements and generic interworking conventions
The standard also applies upper GSM protocols up to and including the GSM SMS-RP protocol so that existing GSM Service Centres can be reused. The SMS and LRMS applications themselves are outside the document’s scope, as is the network behind the Fixed part (FP).
The document is organized into main clauses on scope, references, definitions, service description, LRMS, MMSP protocol definition, SMS, and annexes. Annex A gives support of MMSP by the DECT lower layers, and Annex C covers SMS-RP requirements and message sequences.
| Annex | What it covers |
|---|---|
| Annex A | Support of MMSP by the DECT lower layers, including profile-specific information elements, MMSP message implementation, and network layer segmentation rules for LRMS PTP |
| Annex C | SMS-RP requirements and message sequences |
What are the key requirements of SIST EN 300 757 V1.3.1:2003?
SIST EN 300 757 V1.3.1:2003 is a layered messaging profile. The practical result is that an implementation has to fit the DECT radio and link layers, define the messaging protocol behaviour, and then map SMS or other message services onto those procedures.
LRMS service and bearer behaviour
Clause 4 and Clause 5 define LRMS as a service for acknowledged or unacknowledged transfer of multimedia message objects. It supports both PTP and PTM operation, which matters because the same profile can be used for direct terminal-to-terminal messaging or for broadcast-like delivery to several recipients.
Table 4.2 sets the service performance targets for SMS/LRMS PTP and LRMS PTM, including throughput, error rate, minimum SDU size, and segmented SDU size. In practice, this tells implementers what payload handling and link efficiency the profile is designed to support.
DECT layer requirements
Clause 5 states requirements for the PHY, MAC, DLC, and NWK layers. The MAC section lists supported services, protocol parameters, message types, timers, and procedures, with conditions depending on features such as LRMS PTP, LRMS PTM, protected B-field availability, and encryption support.
This matters because a product is not simply “DECT compatible” - it has to implement the right mix of class A, class B, and class U behaviour, paging, system information, encryption handling, and bearer setup procedures to carry LRMS correctly.
MMSP architecture and behaviour
Clause 6 defines the Multimedia Messaging Service Protocol (MMSP). The MMSP is described as a stateless protocol that packetizes application data, adds MMSP control information, and uses NWK and/or DLC primitives to carry the frames.
Clause 6 also splits MMSP into a call control part (C-MMS) and a messaging part (M-MMS). C-MMS uses normal DECT call control for establishment, suspension, resumption, and release, while M-MMS handles SEND, RETRIEVE, EXT_CMD, STATUS, and ESC_CMD procedures.
For implementers, this means control signalling and message transport are separated. The device has to manage both the call context and the message content, and it has to react correctly to replies, status indications, multi-part messages, and unsupported commands or information elements.
SMS interworking
Clause 7 defines the SMS profile. It maps GSM-style SMS onto DECT messaging, including SMS Mobile Originated (SMS-MO) and SMS Mobile Terminated (SMS-MT) service.
The key practical point is that SMS transfer is not treated as a generic text feature. Clause 7.4 ties SMS message transfers to DECT CC transactions, and it also addresses authentication and ciphering. Clause 7.7 then defines class B link establishment, multiple frame operation, suspension and resumption, release, and re-establishment for the SMS bearer.
Interworking and information element coding
Annex A is central for implementation work. It defines the MMS Generic Header, MMS Object Header, and MMS Extended Header information elements, along with the mapping rules between MMSP messages and DECT lower-layer procedures.
This matters in practice because the interworking unit has to encode message type, reply handling, service type, user data type, multipart handling, and capability or status attributes in the exact way expected by the peer entity. The annex also covers segmentation rules for LRMS PTP, which is important when messages are too large for a single transfer.
Error handling and timing
Clause 5 includes timer support and protocol error handling for the relevant DECT layers. It also defines what happens with invalid or unknown frames and how class A and class B recovery behaves.
For a buyer or engineer, this is where interoperability risk is managed. A product needs the right timers, retransmission behaviour, and recovery handling so messages are not lost or left hanging when links change or frames are rejected.
What terms does SIST EN 300 757 V1.3.1:2003 define?
- Digital Enhanced Cordless Telecommunications (DECT) - the cordless telecommunications system on which the profile runs.
- Low Rate Messaging Service (LRMS) - the DECT service for slow acknowledged or unacknowledged transfer of multimedia message objects.
- Short Message Service (SMS) - the GSM-like point-to-point messaging service carried as a subset of LRMS.
- Multimedia Messaging Service Protocol (MMSP) - the stateless protocol that packetizes message content and carries control information across DECT.
- Call control part (C-MMS) - the MMSP part that uses DECT call control for link setup, suspension, resumption, and release.
- Messaging part (M-MMS) - the MMSP part that carries the actual message transfer procedures.
- Interworking Unit (IWU) - the unit that maps messaging between DECT and external services or networks.
Who uses SIST EN 300 757 V1.3.1:2003?
SIST EN 300 757 V1.3.1:2003 is used by people designing or integrating DECT equipment that must carry messaging rather than voice alone. That includes terminal vendors, fixed part and base station designers, and system integrators working with private or public roaming applications.
It is also relevant to teams reusing GSM Service Centres for SMS transport, because the standard explicitly supports GSM SMS-RP encapsulation. Test labs, quality managers, and buyers use it to check whether a DECT product supports the expected LRMS or SMS interworking model.
What changed in SIST EN 300 757 V1.3.1:2003 from the previous edition?
SIST EN 300 757 V1.3.1:2003 replaces the former ETS 300 757, known as the E.2 profile, and the former ETS 301 678, known as CTM FP2. The introduction says the document aligns the profile with the DECT base standards and includes editorial changes.
Which standards are used with SIST EN 300 757 V1.3.1:2003?
| Reference | What it contributes |
|---|---|
| ETSI EN 300 175-1 to EN 300 175-8 | The DECT common interface, including overview, PHL, MAC, DLC, NWK, identities and addressing, security features, and speech coding/transmission |
| ETSI EN 300 444 | DECT Generic Access Profile (GAP) |
| ETSI ETS 300 559 | GSM Point-to-Point SMS support on the mobile radio interface |
| ISO/IEC 8073 | The connection-mode transport service used in checksum handling |
These references are the base DECT and GSM documents that the profile builds on. In practice, an implementation of this standard has to fit those layer definitions and message rules as well.
What does the SIST EN 300 757 V1.3.1:2003 document contain?
The document contains service descriptions, layered requirements, protocol definitions, and detailed mappings between messaging functions and DECT lower-layer procedures. It includes tables for supported services, protocol parameters, messages, message parameters, timers, and procedure support across LRMS and SMS.
It also includes figures for the MMSP model and message flows, plus procedure descriptions for SEND, RETRIEVE, STATUS, EXT_CMD, and ESC_CMD. Annex A adds the information-element codings and mapping rules that implementers need for interworking and segmentation.
For SMS, the document contains message formatting rules for SMS-SEND and SMS-SEND-RPY, and procedure sequences for outgoing and incoming messaging calls, message transfer, and link handling. That is the part most directly used in implementation, interoperability testing, and conformance verification.
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Frequently Asked Questions
SIST EN 300 757 V1.3.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital Enhanced Cordless Telecommunications (DECT); Low Rate Messaging Service (LRMS) including Short Messaging Service (SMS)". This standard covers: Alignment with base standards and editorial changes.
Alignment with base standards and editorial changes.
SIST EN 300 757 V1.3.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 757 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
'LJLWDOQHL]EROMãDQHEUH]YUYLþQHWHOHNRPXQLNDFLMH'(&7±1L]NRKLWURVWQDVWRULWHY
VSRURþDQMD/506YNOMXþQRVVWRULWYLMRNUDWNLKVSRURþLO606
Digital Enhanced Cordless Telecommunications (DECT); Low Rate Messaging Service
(LRMS) including Short Messaging Service (SMS)
Ta slovenski standard je istoveten z: EN 300 757 Version 1.3.1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
'(&7
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
European Standard (Telecommunications series)
Digital Enhanced Cordless Telecommunications (DECT);
Low Rate Messaging Service (LRMS)
including Short Message Service (SMS)
2 ETSI EN 300 757 V1.3.1 (2002-01)
Reference
REN/DECT-A0203
Keywords
data, DECT, profile, SMS
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ETSI
3 ETSI EN 300 757 V1.3.1 (2002-01)
Contents
Intellectual Property Rights.8
Foreword.8
Introduction .8
1 Scope.9
2 References.10
3 Definitions, symbols and abbreviations .11
3.1 Definitions.11
3.2 Symbols.11
3.3 Abbreviations.11
4 Description of services.13
4.1 General.13
4.2 Low Rate Messaging Service (LRMS).13
4.2.1 Point-To-Point (PTP).13
4.2.2 Point-To-Multipoint (PTM).14
4.3 Short Message Service (SMS).14
4.4 Service objectives.14
5 Low Rate Messaging Service (LRMS) .15
5.1 Reference configuration.15
5.2 Functional description.15
5.2.1 General.15
5.2.2 Exceptions for Point-To-Multipoint (PTM) service .16
5.2.2.1 MMS relations to outside networks (horizontal model).16
5.2.2.2 Architecture.16
5.2.2.3 MMS relations to the upper/lower layers (vertical model).16
5.2.2.4 Phases of the horizontal interactions.16
5.3 Physical layer requirements.16
5.4 MAC layer requirements .17
5.4.1 Requirements Point-To-Point (PTP) service.17
5.4.2 Requirements Point-To-Multipoint (PTM) service.17
5.4.3 Capabilities.18
5.4.3.1 Services.18
5.4.3.2 Protocol parameters.18
5.4.3.3 Messages.19
5.4.3.4 Message parameters.21
5.4.3.5 Functions implemented.22
5.4.3.6 Timer support.23
5.4.3.7 Procedure support.23
5.5 DLC layer requirements .24
5.5.1 Requirements C-plane Point-To-Point (PTP) service .24
5.5.2 Requirements C-plane Point-To-Multipoint (PTM) service .25
5.5.3 Requirements U-plane.25
5.5.4 Capabilities.25
5.5.4.1 C-plane services.25
5.5.4.2 C-plane procedures.25
5.5.4.2.1 Point to point acknowledged operation .25
5.5.4.2.2 Unacknowledged operation.27
5.5.4.2.3 Broadcast operation.27
5.5.4.2.4 Management procedures.28
5.5.4.3 C-plane PDU frame structure.29
5.5.4.4 C-plane messages.29
5.5.4.5 C-plane timers.34
5.5.4.6 C-plane protocol error handling .34
5.6 Network layer requirements .35
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4 ETSI EN 300 757 V1.3.1 (2002-01)
5.6.1 Requirements Point-To-Point (PTP) service.35
5.6.2 Requirements Point-To-Multipoint (PTM) service.35
5.7 Management entity requirements .36
5.8 Generic interworking conventions .36
5.8.1 MMSP procedures.36
5.8.2 Multimedia Messaging Service - Service Access Point (MMS-SAP) .36
5.8.3 MMSP primitives Point-To Point (PTP) service .37
5.8.3.1 C-MMS primitives.37
5.8.3.2 M-MMS primitives.37
5.8.3.3 Parameters.37
5.8.4 MMSP primitives Point-To-Multipoint (PTM) Service .37
5.8.4.1 M-MMS primitives.37
5.8.4.2 Parameters.37
6 MMSP protocol definition.38
6.1 General.38
6.2 Functional description.38
6.2.1 General.38
6.2.2 MMS relations to outside networks (horizontal model).39
6.2.3 Architecture.40
6.2.3.1 General.40
6.2.3.2 MMSP call control part (C-MMS) .40
6.2.3.3 MMSP messaging part (M-MMS) .40
6.2.4 MMS relations to the upper/lower layers (vertical model) .40
6.2.4.1 General.40
6.2.4.2 MMS relation to the DECT upper layers .41
6.2.4.2.1 General.41
6.2.4.2.2 M-MMS.41
6.2.4.2.3 C-MMS.42
6.2.5 MMS relations to outside networks (vertical and horizontal model).42
6.2.5.1 General.42
6.2.5.2 Phases of the horizontal interactions.42
6.2.5.2.1 General.42
6.2.5.2.2 PP originated outgoing MMS call .42
6.2.5.2.3 Example of a typical PP initiated message .44
6.2.5.2.4 PP terminated incoming MMS call.44
6.3 MMSP protocol messages and procedures.45
6.3.1 C-MMS messages and procedures.45
6.3.2 M-MMS.45
6.3.2.1 Summary of the M-MMS messages.45
6.3.2.2 MMS SEND procedure.45
6.3.2.2.1 {MMS-SEND} message contents.46
6.3.2.2.2 {MMS-SEND-RPY} message contents.46
6.3.2.3 MMS SEND-REQ procedure.47
6.3.2.3.1 {MMS-SEND-REQ} message contents.47
6.3.2.3.2 {MMS-SEND-RPY} message contents.48
6.3.2.4 MMS RETRIEVE procedure .48
6.3.2.4.1 {MMS-RETRIEVE} message contents.49
6.3.2.4.2 {MMS-RETRIEVE-RPY} message contents.49
6.3.2.5 MMS RETRIEVE-HDR procedure .49
6.3.2.5.1 {MMS-RETRIEVE-HDR} message contents.50
6.3.2.5.2 {MMS-RETRIEVE-RPY} message contents.50
6.3.2.6 MMS-EXT-CMD procedure.51
6.3.2.6.1 {MMS-EXT-CMD} message contents.51
6.3.2.6.2 {MMS-EXT-CMD-RPY} message contents.52
6.3.2.7 MMS-STATUS procedures.52
6.3.2.7.1 {MMS-STATUS} message contents.53
6.3.2.7.2 {MMS-STATUS-RPY} message contents.53
6.3.2.8 MMS-ESC-CMD procedure.53
6.3.2.8.1 {MMS-ESC-CMD} message contents .54
6.3.2.8.2 {MMS-ESC-CMD-RPY} message contents.54
6.3.2.8.3 Generic interworking conventions for the {MMS-ESC-CMD} command and reply.54
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5 ETSI EN 300 757 V1.3.1 (2002-01)
6.3.2.9 Procedures for the use of the MMS-message identifier .55
6.3.2.10 Multi-part message procedures.55
6.3.2.10.1 Multi-part send procedures.55
6.3.2.10.2 Multi-part retrieve procedures .56
6.3.2.11 Unsupported MMS command and IE compatibility procedures .56
6.3.2.11.1 Unsupported MMS commands procedure .56
6.3.2.11.2 Unsupported Information elements procedure .56
6.4 MMSP information elements .56
6.4.1 Summary of M-MMSP information elements .56
6.5 Parameters of M-MMSP service primitives .57
6.5.1 M_MMS_SEND- {req, ind}.57
6.5.2 M_MMS_SEND_REQ- {req, ind}.58
6.5.3 M_MMS_SEND_RPY- {req, ind} .58
6.5.4 M_MMS_RETRIEVE- {req, ind}.59
6.5.5 M_MMS_RETRIEVE_RPY- {req, ind} .59
6.5.6 M_MMS_EXT_CMD- {req, ind} .60
6.5.7 M_MMS_EXT_CMD_RPY- {req, ind}.60
6.5.8 M_MMS_STATUS- {req, ind} .61
6.5.9 M_MMS_STATUS_RPY- {req, ind} .61
6.5.10 M_MMS_ESC_CMD- {req, ind}.62
6.5.11 M_MMS_ESC_CMD_RPY- {req, ind}.62
7 Short Message Service (SMS).63
7.1 Feature and service definitions.63
7.1.1 Application features.63
7.1.2 MMS features.63
7.1.3 NWK features.63
7.1.4 DLC services.63
7.2 General requirements.63
7.2.1 Reference configurations.63
7.2.2 Protocol architecture.63
7.3 Interoperability requirements.64
7.3.1 Application features.64
7.3.2 MMS features.65
7.3.3 NWK features.65
7.3.4 DLC services.65
7.3.5 MAC services.65
7.3.6 PHL services.65
7.3.7 Application feature to procedure mapping.66
7.3.8 MMS feature to procedure mapping .66
7.3.9 NWK feature to procedure mapping.66
7.3.10 DLC feature to procedure mapping .67
7.4 Application procedures.67
7.4.1 Incoming message storage.67
7.4.2 Message encapsulation.67
7.4.3 General interworking requirements .67
7.4.3.1 Mapping of SMS message transfers onto CC- transactions .67
7.4.3.2 Authentication and ciphering .67
7.4.4 Message/primitive interworking.68
7.5 MMS procedures.68
7.5.1 Messaging send procedure.68
7.6 NWK layer procedure descriptions .70
7.6.1 Summary of outgoing call messages, normal case.70
7.6.2 Outgoing messaging call request .70
7.6.3 Outgoing messaging call connect .70
7.6.4 Summary of incoming call messages, normal case.71
7.6.5 Incoming messaging call request .71
7.6.6 Incoming messaging call connect .72
7.6.7 Message transfer.72
7.6.8 Terminal capability indication .73
7.7 DLC layer procedures .73
7.7.1 Class B link establishment.73
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6 ETSI EN 300 757 V1.3.1 (2002-01)
7.7.1.1 Associated procedures.75
7.7.1.1.1 Timer management .75
7.7.1.1.2 Re-transmission counter management.75
7.7.1.1.3 Multiple frame operation variables management .75
7.7.1.2 Exceptional cases.76
7.7.1.2.1 Timer expiry .76
7.7.1.2.2 Receipt of a request for link release .76
7.7.1.2.3 Receipt of an indication for a connection release .76
7.7.2 Class B multiple frame operation .76
7.7.2.1 Class B multiple frame operation with segment reassemble.79
7.7.2.2 Associated procedures.79
7.7.2.2.1 Timer management .79
7.7.2.2.2 Re-transmission counter management.79
7.7.2.2.3 Multiple frame operation variables management .79
7.7.2.2.4 Exception handling.79
7.7.2.3 Exceptional cases.79
7.7.2.3.1 Timer expiry .79
7.7.2.3.2 Receipt of a request for link release .79
7.7.2.3.3 Receipt of an indication for a connection release .80
7.7.2.3.4 DLC wants to make a connection handover .80
7.7.3 Class B link release.80
7.7.3.1 Associated procedures.82
7.7.3.1.1 LLME U-plane release .82
7.7.3.1.2 LLME release a MAC connection.82
7.7.3.1.3 Timer management .82
7.7.3.2 Exceptional cases.82
7.7.3.2.1 Timer expiry .82
7.7.3.2.2 Receipt of an indication for a connection release .83
7.7.3.2.3 Collision of identical transmitted and received commands .83
7.7.4 Class B link suspension and resumption.83
7.7.4.1 Unacknowledged suspend.83
7.7.4.2 Class B link resumption .83
7.7.4.3 Associated procedures.83
7.7.4.3.1 Timer management .83
7.7.4.4 Exceptional cases.83
7.7.4.4.1 Timer expiry .83
7.7.4.4.2 Receipt of an indication for a connection release .84
7.7.5 Class B link re-establishment.84
7.7.5.1 Associated procedures.86
7.7.5.1.1 Timer management .86
7.7.5.2 Exceptional cases.86
7.7.5.2.1 Timer expiry .86
7.7.5.2.2 Receipt of a request for link release .86
7.7.5.2.3 Receipt of an indication for a connection release .86
7.7.5.2.4 Collision of identical transmitted and received commands .86
7.8 MAC layer procedures .87
7.9 PHY layer requirements.87
7.10 Management procedures.87
7.10.1 Broadcast attribute management.87
Annex A (normative): Support of MMSP by the DECT lower layers.88
A.1 Profile-specific information elements.88
A.1.1 MMS Generic Header information element .88
A.1.2 MMS Object Header information element .92
A.1.3 MMS Extended Header information element.97
A.2 MMSP message implementation.98
A.2.1 General.98
A.2.2 C-MMS primitives mapping rules.98
A.2.2.1 LRMS PTP C-MMS primitives .98
A.2.2.2 LRMS PTM C-MMS primitives.98
A.2.3 M-MMS message mapping rules.98
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7 ETSI EN 300 757 V1.3.1 (2002-01)
A.2.3.1 General rules for LRMS PTP.98
A.2.3.2 General rules for LRMS PTM .99
A.2.3.3 Information element mapping rules .99
A.3 Network layer segmentation rules for LRMS PTP.99
A.3.1 Procedure at the sending side .99
A.3.2 Procedure at the receiving side.100
Annex B (informative): Profile selection coding.101
B.1 <> coding.101
B.2 <> coding.101
B.3 <> coding.101
Annex C (informative): Typical message mapping sequences.102
C.1 Summary of SMS-RP requirements.102
C.2 Message sequences.102
Annex D (informative): Bibliography.104
History .105
ETSI
8 ETSI EN 300 757 V1.3.1 (2002-01)
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 (http://webapp.etsi.org/IPR/home.asp).
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 European Standard (Telecommunications series) has been produced by ETSI Project Digital Enhanced Cordless
Telecommunications (DECT).
National transposition dates
Date of adoption of this EN: 4 January 2001
Date of latest announcement of this EN (doa): 30 April 2001
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2001
Date of withdrawal of any conflicting National Standard (dow): 31 October 2001
Introduction
The present document replaces the former ETS 300 757, known as the E.2 profile, and the former ETS 301 678 (never
published), known as CTM FP2. It defines profiles for Digital Enhanced Cordless Telecommunications (DECT)
systems conforming to EN 300 175 parts 1 [1] to 8 [8]. It is part of a family of profiles aimed at the general connection
of terminals supporting non-voice services to a fixed infrastructure, private and public.
ETSI
9 ETSI EN 300 757 V1.3.1 (2002-01)
1 Scope
The Low Rate Messaging Service (LRMS), specified in the present document, provides a means for the slow,
acknowledged or unacknowledged, transfer of multimedia message objects, including the Short Message Service
(SMS). It provides both point-to-point and point-to-multipoint messaging. This service may be used for private and
public roaming applications.
The present document defines the requirements on the Physical (PHY), Medium Access Control (MAC), Data Link
Control (DLC) and Network (NWK) layers of DECT. The standard also specifies management entity requirements and
generic interworking conventions, which ensure the efficient use of the DECT spectrum.
The present document further mandates how to implement a GSM like Short Message Service (SMS), Point to Point
(PTP), which uses a sub-set of the Low Rate Messaging Service (LRMS) mentioned before as a bearer service.
SMS-PTP includes the following two services:
- SMS Mobile Originated (SMS-MO), for transport of short messages from PT to FT;
- SMS Mobile Terminated (SMS-MT), for transport of short messages from FT to PT.
The Short Message Service, Cell Broadcast is outside the scope of the present document.
In order to facilitate re-use of excising GSM Service Centres, the present document applies the upper GSM protocols
up-to and including the GSM SMS-RP protocol. Therefore, interworking functions handling the encapsulation of GSM
SMS-RP messages are specified.
The following picture shows the protocols defined in the present document.
SMS IWU LRMS PTM
LRMS PTP
or IWU or
IWU or
application application
application
SMS
GSM
SMS
LRMS PTM
LRMS PTP
MMSP
NWK
DLC
MAC
PHL
ETSI
10 ETSI EN 300 757 V1.3.1 (2002-01)
The SMS or LRMS applications are outside the scope of the present document. So is the network behind the FP. Any
information provided concerning applications or the network behind the FP is provided for informative, descriptive
...



