SIST ETS 300 133-1 E1:2003
(Main)Paging Systems (PS); Enhanced Radio MEssage System (ERMES); Part 1: General aspects
- Abstract
Preparation of a standard containing: - Presentation of the ERMES standards - General description of ERMES system - Vocabulary
- 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 ETS 300 133-1 E1:2003 is the Slovene publication of ETS 300 133-1, the ETSI standard for Paging Systems (PS) and the European Radio Message System (ERMES). It gives the general aspects of ERMES - the structure of the seven-part series, the system overview, and the common vocabulary and abbreviations used across the full ETS.
What does SIST ETS 300 133-1 E1:2003 specify?
SIST ETS 300 133-1 E1:2003 specifies the general aspects of ERMES. It introduces the series, explains how the seven parts fit together, describes the system at a high level, and provides the vocabulary that is used throughout the ERMES ETS.
The document is organized into a foreword, Clause 1 on scope, Clause 2 on normative references, Clause 3 on definitions and abbreviations, Clause 4 on the structure of the ETS, Clause 5 on the general description of the system, and Annex A with an ERMES references list.
Clause 3 is especially important for readers who move between parts of the series. It gives a shared vocabulary and abbreviation list so that the same terms have the same meaning in all parts of ETS 300 133.
What are the key requirements of SIST ETS 300 133-1 E1:2003?
SIST ETS 300 133-1 E1:2003 is mainly a system and terminology document, but it still sets out the key framework that the rest of the ERMES series follows. In practice, it tells you what ERMES contains, how the system is divided into functions, and which concepts and identifiers are used in the network.
How the ETS is structured
Clause 4 defines the seven parts of ETS 300 133 and what each part covers. This matters because Part 1 is only the entry point - the detailed service, network, air interface, receiver, base station, and operation and maintenance specifications are split into Parts 2 to 7.
- Part 1 - general aspects
- Part 2 - service aspects
- Part 3 - network aspects
- Part 4 - air interface specification
- Part 5 - receiver conformance specification
- Part 6 - base station conformance specification
- Part 7 - operation and maintenance aspects
What ERMES is intended to do
Clause 5.2 states the system objectives. ERMES is described as supporting the basic paging services, transparent data, a wide range of supplementary services, individual calls, group calls, radio distribution services, and international roaming. For a user or operator, this means the system is defined as a multi-service paging platform, not just a simple alerting service.
Clause 5.2 also gives the performance objectives: spectrum efficiency, reasonable cost, receiver size and power consumption, and compatibility with Integrated Services Digital Network (ISDN) and future standardised message handling services. In practice, these objectives explain why the standard pays attention to efficient radio use, portable receiver design, and interworking.
What services and receiver types the system supports
Clause 5.3 identifies four basic services: tone only, numeric, alphanumeric, and transparent data. It also groups supplementary services into areas such as acknowledgements, destination-related services, protection against loss of messages, priority, community of interest, charging, restriction of calls, and bureau services. This is the part to read when you need to know what kind of paging service the system can carry.
Clause 5.4.1 links those services to receiver types: tone-only, numeric, alphanumeric, and transparent data receivers. It also states that all receivers conform to the radio interface in Part 4 and that receiver conformance is specified in Part 5. For procurement or design, this tells you which receiver category matches the service you plan to offer.
How the network is organized
Clause 5.4 describes the functional entities that make up an ERMES operator network:
- the receiver
- the Base Station (BS)
- the Paging Area Controller (PAC)
- the Paging Network Controller (PNC)
- the Operation and Maintenance Centre (OMC)
This structure matters because each entity has a clear role in call handling, message routing, radio transmission, or network supervision. The PNC can act as input, home, or transmitting controller; the PAC queues and batches messages for delivery to base stations; and the OMC is used for monitoring and control.
How access, identities, and call handling work
Clause 3 defines the key identities and access concepts used in the series. The Radio Identity Code (RIC) identifies the receiver on the radio path, the Address Code (AdC) identifies the receiver and alert signal indicator, and the Service Number is used in the two-stage selection procedure. For implementation, these terms are central to addressing and message delivery.
Clause 3 also defines access type and access mode. Access can be one-stage or two-stage selection, and the access mode can be interactive or non-interactive. That distinction matters when designing the user entry path into the network and the way the calling party submits the paging task.
Clause 3.3.4 introduces network status and three state status for call acceptance. The network can accept a call, reject it, or warn that full quality of service cannot be guaranteed and ask for confirmation. In practice, this gives the network a graded response instead of a simple yes/no decision.
What the radio subsystem must support
Clause 5.5 summarizes the radio subsystem. Paging messages are queued in the PAC, the BS adds synchronisation and system identification information, and the address and message parts are forward error correction coded. The message part is also protected by interleaving, and the air interface uses 4-PAM/FM modulation.
The clause also states that the radio subsystem supports frequency divided, time divided, or combined time and frequency divided operation. It operates on 1 to 16 common channels in the 169.4125 MHz to 169.8125 MHz band with 25 kHz spacing. For planning and equipment design, these are the core radio parameters that define the ERMES air interface.
What terms does SIST ETS 300 133-1 E1:2003 define?
SIST ETS 300 133-1 E1:2003 defines the common vocabulary for the whole ERMES series. These terms are used consistently across all seven parts, so they are important for reading the later service, network, and conformance documents.
- ERMES system - the total set of operator networks that together form the European Radio Message System.
- Radio Identity Code (RIC) - the radio-path identifier for the receiver or receivers intended to get a page.
- Paging Network Controller (PNC) - the central call processing unit in an operator network, responsible for registrations and paging tasks.
- Paging Area Controller (PAC) - the entity that controls the base stations in one paging area and manages message delivery to them.
- Basic service - one of the four paging categories: tone-only, numeric, alphanumeric, or transparent data paging.
- Supplementary service - a service that modifies or adds to a basic service.
- Access method - the combination of access terminal, access network, access mode, and access type.
- Message delivery time - the maximum allowed delay between input acknowledgement and transmission of the message on the radio path.
Who uses SIST ETS 300 133-1 E1:2003?
SIST ETS 300 133-1 E1:2003 is used by paging system operators, network engineers, service planners, receiver and base station designers, and operation and maintenance teams. It is also useful for quality and procurement staff who need to understand the ERMES architecture and vocabulary before working with the later parts of the series.
In practice, these readers use it to understand the roles of PNC, PAC, BS, and OMC, the supported service categories, the access and identity terms, and the way the seven-part standard is divided. It is the overview document that helps people navigate the rest of ETS 300 133.
What changed in SIST ETS 300 133-1 E1:2003 from the previous edition?
SIST ETS 300 133-1 E1:2003 corresponds to ETS 300 133-1 Edition 1. The history box in the document records the first edition as July 1992 and notes a PDF conversion in January 1996.
Which standards are used with SIST ETS 300 133-1 E1:2003?
The normative references for this part are the other parts of the ERMES series. They provide the detailed service, network, air interface, receiver, base station, and operation and maintenance specifications that Part 1 only summarizes.
| Reference | What it contributes |
|---|---|
| ETS 300 133-2 | Service aspects, including services, facilities, quality of service, and receiver features |
| ETS 300 133-3 | Network aspects, including architecture, numbering, addressing, access, and call processing |
| ETS 300 133-4 | Air interface specification for the radio subsystem |
| ETS 300 133-5 | Receiver conformance specification and measurement methods |
| ETS 300 133-6 | Base station conformance specification |
| ETS 300 133-7 | Operation and maintenance aspects |
Annex A also gathers the wider references used across the ERMES series, including CCITT Recommendations, CEPT frequency coordination material, and ISO standards for character sets and data communication procedures.
What does the SIST ETS 300 133-1 E1:2003 document contain?
SIST ETS 300 133-1 E1:2003 contains a structured vocabulary with an index of terms, grouped definitions, and a long list of abbreviations and acronyms. It also contains the summary of the seven-part ETS, the general description of the ERMES system, and two figures showing the operator network and the functional organization of the telecommunication network.
The document also includes Annex A, which collects ERMES references used throughout the series. This makes the part useful as a navigation aid, a terminology reference, and a high-level system map for the rest of ETS 300 133.
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Frequently Asked Questions
SIST ETS 300 133-1 E1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Paging Systems (PS); Enhanced Radio MEssage System (ERMES); Part 1: General aspects". This standard covers: Preparation of a standard containing: - Presentation of the ERMES standards - General description of ERMES system - Vocabulary
Preparation of a standard containing: - Presentation of the ERMES standards - General description of ERMES system - Vocabulary
SIST ETS 300 133-1 E1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.20 - Paging systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ETS 300 133-1 E1:2003 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
6LVWHPLRVHEQHJDNOLFD 36 ¤±(YURSVNLVLVWHP]DUDGLMVNRVSRURþDQMH (50(6 ±
GHO 6SORãQLYLGLNL
Paging Systems (PS); Enhanced Radio MEssage System (ERMES); Part 1: General
aspects
Ta slovenski standard je istoveten z: ETS 300 133-1 Edition 1
ICS:
33.070.20 Sistem za osebni klic Paging systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN ETS 300 133-1
TELECOMMUNICATION July 1992
STANDARD
Source: ETSI TC-PS Reference: DE/PS-1001-1
ICS: 33.080
ERMES, paging systems
Key words:
Paging systems (PS);
European Radio Message System (ERMES)
Part 1: General aspects
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
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 1992. All rights reserved.
New presentation - see History box
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ETS 300 133-1: July 1992
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 300 133-1: July 1992
Contents
Foreword.5
1 Scope .7
2 Normative references .7
3 Definitions and abbreviations.7
3.1 Introduction.7
3.2 Index.8
3.3 Vocabulary .9
3.3.1 Administrative terms.9
3.3.2 Identity related terms.10
3.3.3 Services, facilities and receiver features.10
3.3.4 Network related terms.11
3.3.5 Access related terms.13
3.3.6 Area concepts. 13
3.3.7 Terms related to the radio subsystem.13
3.3.8 Miscellaneous . 14
4 Structure of the ETS.17
4.1 Part 1: General aspects .17
4.2 Part 2: Service aspects .17
4.3 Part 3: Network aspects.17
4.4 Part 4: Air interface specification.17
4.5 Part 5: Receiver conformance specification. 17
4.6 Part 6: Base station conformance specification.17
4.7 Part 7: Operation and maintenance aspects.17
5 General description of the system .17
5.1 Introduction.17
5.2 General objectives .18
5.2.1 Service related objectives .18
5.2.2 Performance related objectives .18
5.3 Services.18
5.4 System architecture, entities and functions.19
5.4.1 The receiver.19
5.4.2 The Base Station.19
5.4.3 The Paging Area Controller .19
5.4.4 The Paging Network Controller.20
5.4.5 The Operation and Maintenance Centre.20
5.4.6 System architecture, interworking and interfaces .20
5.5 The radio subsystem. 22
Annex A (informative): ERMES references list . 23
History . 26
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ETS 300 133-1: July 1992
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ETS 300 133-1: July 1992
Foreword
This European Telecommunication Standard (ETS) has been produced by the Paging Systems (PS)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS comprises seven parts with the generic title "Paging systems; European Radio Message System
(ERMES)". The title of each part is listed below:
- ETS 300 133-1: "Part 1: General aspects"
- ETS 300 133-2: "Part 2: Service aspects"
- ETS 300 133-3: "Part 3: Network aspects"
- ETS 300 133-4: "Part 4: Air interface specification"
- ETS 300 133-5: "Part 5: Receiver conformance specification"
- ETS 300 133-6: "Part 6: Base station specification"
- ETS 300 133-7: "Part 7: Operation and maintenance aspects"
This part, ETS 300 133-1, gives a general description of the European Radio Message System (ERMES).
This part also includes a vocabulary of terms and a list of abbreviations and acronyms.
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ETS 300 133-1: July 1992
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ETS 300 133-1: July 1992
1 Scope
This part of the seven part European Telecommunication Standard ETS 300 133, describes the general
aspects of the European Radio Message System (ERMES). It comprises an abstract of each part of the
ETS along with a general description of:
- the objectives of the system;
- the services and facilities;
- a description of the elements and their functions.
A complete vocabulary for all parts of ETS 300 133 is given, together with a list of abbreviations and
acronyms.
Normative references which are quoted in each part of ETS 300 133 are gathered together and listed in
Annex A (informative) of this part.
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 300 133-2 (1992): "Paging Systems (PS); European Radio Message
System (ERMES) Part 2: Service aspects".
[2] ETS 300 133-3 (1992): "Paging Systems (PS); European Radio Message
System (ERMES) Part 3: Network aspects".
[3] ETS 300 133-4: (1992) "Paging Systems (PS); European Radio Message
System (ERMES) Part 4: Air interface specification".
[4] ETS 300 133-5: (1992) "Paging Systems (PS); European Radio Message
System (ERMES) Part 5: Receiver conformance specification".
[5] ETS 300 133-6: (1992) "Paging Systems (PS); European Radio Message
System (ERMES) Part 6: Base station conformance specification".
[6] ETS 300 133-7 (1992): "Paging Systems (PS); European Radio Message
System (ERMES) Part 7: Operation and maintenance aspects".
3 Definitions and abbreviations
3.1 Introduction
The terms, definitions and abbreviations used throughout the ERMES ETS are given in this Clause. A
definition or a reference to a definition given in this Clause is valid in all parts of the ETS even if no
definition is given within a particular part.
An explanation of all the abbreviations and acronyms used in this ETS is given in alphabetical order in
subclause 3.4.
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ETS 300 133-1: July 1992
The definitions are presented in eight groups. Within each group the definitions are given in a conceptual
order rather than alphabetical order. Each defined term is allocated a number. To assist the reader in
finding the definition of a term, an index of terms together with their associated numbers is given in
subclause 3.2.
3.2 Index
505 Access method
503 Access mode
501 Access network
506 Access service
504 Access terminal
502 Access type
309 Additional receiver feature
210 Address code
702 Alert signal
703 Alert signal indicator
214 Authentication code
604 Base station area
307 Basic receiver feature
202 Basic RIC
427 Basic kernel
301 Basic service
709 Batch number
710 Batch type
409 Call acceptance
102 Calling party
707 Codeblock
706 Code-word
205 Country code
311 Divert AdC
711 End of Message (EOM) character
402 ERMES system
435 External interface
705 External receiver
104 Fixed subscriber
430 Fixed subscriber records database
424 Fragmentation
416 Frequency divided network
605 Geographical area
211 Group address code
431 Group database
314 Group call
405 Home network
106 Home operator
412 Home PNC (PNC-H)
418 I1 Interface
419 I2 Interface
420 I3 Interface
421 I4 Interface
422 I5 Interface
423 I6 Interface
209 Initial address
411 Input PNC (PNC-I)
434 Internal interface
213 Legitimisation code
208 Local address
712 Long message
802 Message bank
801 Message delivery time
305 Message number
103 Mobile subscriber
428 Mobile subscriber AdC records database
429 Mobile subscriber RIC message database
601 Network area
105 Network operator
407 Network status
425 Network time slot
507 One-stage selection
206 Operator code
203 Operator identity
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ETS 300 133-1: July 1992
401 Operator network
603 Paging area
207 Paging area code
415 Paging area controller
303 Paging call
304 Paging message
410 Paging network controller
701 Paging signal
413 PNC-H (FS)
426 Protocol stack
201 Radio identity code
306 Receiver feature
607 Roaming area
606 Service area
312 Service identification code
212 Service number
310 Standard text
713 Sub-message
313 Subscriber feature
107 Subscriber registration
308 Supplementary receiver feature
302 Supplementary service
704 Symbol
602 System area
403 Telecommunication network
404 Telecommunications management network
408 Three state status
417 Time divided network
109 Toll ticketing
108 Traffic registration
414 Transmitting PNC (PNC-T)
508 Two-stage selection
101 User
406 Visited network
204 Zone code
3.3 Vocabulary
3.3.1 Administrative terms
101 User: a person or machine initiating an access to the operator network or receiving a message
through the operator network. User includes mobile subscribers, fixed subscribers and non-
registered customers.
102 Calling party: a user entering paging tasks into the network.
103 Mobile subscriber: a user who is registered in an operator network and receives paging messages
or uses his subscriber features.
104 Fixed subscriber: a calling party who is registered in a paging network and has an account for
sending messages and use of subscriber features.
105 Network operator: the administration/company which is responsible for the technical and
commercial operation of the operator network.
106 Home operator: the network operator to which a specific user has subscribed.
107 Subscriber registration: the registration of a subscriber as a user of a particular operator network,
together with information on subscribed services, supplementary services and other associated
information needed for traffic handling.
108 Traffic registration: a register of data concerning calls; needed for charging purposes and
statistics.
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ETS 300 133-1: July 1992
109 Toll ticketing: a register of all data concerning a call (calling party, date and time, call duration,
mobile subscriber identity, supplementary services).
3.3.2 Identity related terms
201 Radio Identity Code (RIC): the number used by the system on the radio path to identify the
receiver(s) for which the page is intended. RIC has a total length of 35 bits and consists of four
parts: The zone code (3 bits) the country code (7 bits), the operator code (3 bits) and the local
address (22 bits).
202 Basic RIC: the prime identity of a paging receiver allocated by the network operator when service is
initiated. It shall not be changeable without safeguards against unauthorised changes.
203 Operator identity: the number used by the system on the radio path to identify the home operator
of a receiver. It has a total length of 13 bits and consists of three parts, the zone code, the country
code and the operator code.
204 Zone code: binary representation of the zone number defined in ETS 300 133-4 [3], Annex A. The
zone code consists of 3 bits.
205 Country code: binary representation of the country number defined in ETS 300 133-4 [3], Annex A.
The country code consists of 7 bits.
206 Operator code: the number used by the system to identify an operator within a country. It consists
of 3 bits.
207 Paging area code: the number used by the system to identify the paging area.
208 Local address: the number used by a network to identify the receivers subscribed to it. It consists
of 22 bits. The four least significant bits of the local address denote the batch type of the receiver.
209 Initial address: the 18 most significant bits of the local address.
210 Address Code (AdC): identifies the RIC and the alert signal indicator.
211 Group address code: the address code with which a group is called.
212 Service number: the number used to gain access to a Paging Network Controller (PNC) in the two-
stage selection procedure.
213 Legitimisation code: a code stated by a calling party to prove that he is authorised to carry out a
particular restricted operation (an operation which is not allowed to all calling parties).
214 Authentication code: a code used by a mobile or a fixed subscriber to allow the PNC to prove that
the identity stated by this subscriber is true.
3.3.3 Services, facilities and receiver features
301 Basic service: a basic service is one of the four paging categories; tone-only paging, numeric
paging, alphanumeric or transparent data paging.
302 Supplementary service: a supplementary service modifies or supplements a basic service. The
offered supplementary services may be used by the subscribers/users at their discretion.
303 Paging call: the complete process of delivering a paging message from the initiation by the calling
party to the reception by the mobile subscriber.
304 Paging message: the tone-only, numeric, alphanumeric or transparent data information sent to a
paging receiver.
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ETS 300 133-1: July 1992
305 Message number: the number allocated sequentially in the series 1-31 to each paging message.
306 Receiver feature: a receiver feature is a piece of equipment or a function which directly relates to
the operation of the receiver. On this basis three categories of features can be distinguished: basic,
supplementary and additional features.
307 Basic receiver feature: a feature directly related to the operation of a basic service.
308 Supplementary receiver feature: a feature directly related to the operation of a supplementary
service.
309 Additional receiver feature: a feature which is neither a basic nor a supplementary feature.
310 Standard text: a predefined text message associated with an identification number. The texts are
defined by the network operator or may be defined by fixed subscribers.
311 Divert AdC: the AdC to which a mobile subscriber has diverted his paging messages.
312 Service identification code: a two digit code used for the identification of a supplementary service
or a subscriber feature.
313 Subscriber feature: service or supplementary service available to a subscriber according to his
subscription. The feature may be activated on a registration basis or on demand. In this last case, it
shall be activated by the subscriber, after authentication.
314 Group call: a call intended for two or more mobile subscribers.
3.3.4 Network related terms
401 Operator network: all infrastructure which is the responsibility of the network operator.
402 ERMES system: the totality of the operator networks.
403 Telecommunication network: the telecommunication part of the operator network.
404 Telecommunications Management Network: the operation and maintenance part of the operator
network.
405 Home network: the operator network with which a mobile subscriber has signed a subscription.
406 Visited network: the operator network to which the paging messages are routed when they are
sent outside the home network.
407 Network status: an estimated value of the probability that the ERMES system will proceed
successfully with the paging call. It shall be estimated on a per call basis and shall depend on the
availability of all the elements of the system dealing with this call attempt and on message delivery
time.
408 Three state status: the criteria for the call acceptance. If the network status is above a threshold C
the call is accepted. If it is below a threshold UC the call is rejected. Between these two thresholds
the calling party receives information that the transmission cannot be guaranteed with the full quality
of service and a confirmation of the call attempt is demanded from the calling party.
409 Call acceptance: the response to the calling party provided by the PNC-H. This response indicates
whether the call can be accepted.
410 Paging Network Controller (PNC): the central call processing unit associated with each operator's
telecommunication network. It administers subscriber registrations and performs paging tasks.
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ETS 300 133-1: July 1992
411 Input PNC (PNC-I): PNC that is accessed by a calling party.
412 Home PNC (PNC-H): the PNC holding the subscriber registration database for a particular mobile
subscriber and to which all calls for this mobile subscriber are referred for processing.
413 PNC-H (FS): the PNC holding the subscriber registration database for a particular fixed subscriber
and to which all calls of this fixed subscriber are referred for processing.
414 Transmitting PNC (PNC-T): the PNC responsible for routing a particular paging message to the
appropriate paging areas which are under its control.
415 Paging Area Controller (PAC): the functional entity controlling the base stations within one paging
area.
416 Frequency divided network: a network that uses different frequency channels in adjacent paging
areas.
417 Time divided network: a network that uses the same frequency channel during different sub-
sequences (periods of a time cycle) in adjacent paging areas.
418 I1 interface: the radio interface between the base stations and the paging receivers.
419 I2 interface: an interface between the Paging Area Controller and the Base Station.
420 I3 interface: the interface between the PNC and the PAC.
421 I4 interface: the interface between two PNCs.
422 I5 interface: an interface between the access network selected by the user and the operator
network.
423 I6 interface: an interface between the telecommunications terminal and the user.
424 Fragmentation: service offered at OSI layer 4 which allows the splitting of an application packet
into several smaller packets.
425 Network time slot: a particular configuration of an operator's network during a time slot which
consists of only one Paging Area (PA) comprising every BS of the network.
426 Protocol stack: a set of protocols defined to build up the I4 interface.
427 Basic kernel: the minimum of functionalities required for each I4 protocol layer.
428 Mobile subscriber AdC records database: the database giving the required information on mobile
subscribers for the processing of paging calls.
429 Mobile subscriber RIC message database: the database dealing with message numbering and
storing.
430 Fixed subscriber records database: the database giving details of the features available to a
particular fixed subscriber.
431 Group database: the database giving information on the members of a mobile subscriber group.
432 Closed User Group (CUG) database: the database giving information on the members of a CUG.
433 Roaming test message: a paging message sent automatically by the PNC-H to the roaming area
when the roaming is activated.
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ETS 300 133-1: July 1992
434 Internal interface: an interface that is completely contained within an operator network.
435 External interface: an interface that is not completely contained within an operator network.
3.3.5 Access related terms
501 Access network: the telecommunications network to which the access terminal is connected.
502 Access type: corresponds to the one-stage or two-stage selection.
503 Access mode: the communication procedure between the calling party and the PNC. It may be
interactive or non interactive.
504 Access terminal: the terminal with which the user accesses the telecommunication network. It may
be, for example, a telephone set, a telex, a videotex terminal, a PC with modem.
505 Access method: a combination of access terminal, access network, access mode and access
type.
506 Access service: a set of access methods provided to a user to access a service and/or a
supplementary service.
507 One-stage selection: access type with two phases, input AdC and input message.
508 Two-stage selection: access type with three phases, input service number, input AdC and input
message.
3.3.6 Area concepts
601 Network area: the area served by a single operator network.
602 System area: the total of all network areas.
603 Paging area: the area controlled by a PAC. It is the minimum area to which a mobile subscriber is
permitted to subscribe in order to receive his paging messages.
604 Base station area: the radio coverage area of a single base station.
605 Geographical area: one or several paging areas in an operator network. Defined by agreements
between network operators for internetwork roaming or by a single operator for roaming within his
own network. It is used for roaming and choice of destination supplementary services.
606 Service area: the paging area(s) to which the mobile subscriber has subscribed and in which a
paging message will normally be transmitted.
607 Roaming area: the geographical area(s) where the mobile subscriber asks for his messages to be
transmitted when he uses the roaming service.
3.3.7 Terms related to the radio subsystem
701 Paging signal: the signal sent on the radio path to a paging receiver.
702 Alert signal: the signal generated by the receiver as an indication of a received paging signal.
703 Alert signal indicator: the information bits contained in the I1 message header that determines
which alert signal should be generated at the receiver. It is related to the address code input by the
calling party.
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ETS 300 133-1: July 1992
704 Symbol: two bits of information which are the basic unit of information on the air int
...