IS 1885-82 (1996): Electrotechnical Vocabulary, Part 82 ... · Integrated Services Digital Network (ISDN) Part 1 : ... effected by means of user-network signalling. leased circuit

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है”ह”ह

IS 1885-82 (1996): Electrotechnical Vocabulary, Part 82:Integrated Services Digital Networks (ISDN) [LITD 12:Transmitting Equipment for Radio Communication]

IS1885(Part82):1996 tEC SO-( ?16 - 1 )-: 1995

h Iian Standard

ELECTROTECHNICALVOCABULARY PART 82 INTEGRATED SERVICES DIGITAL NETWORKS ( ISDN )

ICS 33.080; 01.(!40.33

OBIS 1996

BUREAU OF IN-DIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

November 1996 Price Group 6

Radio Communication Sectional Committee, LTD 20

NATIONAL FOREWORD

This Indian Standard which is identical with IEC Pub 50(716-l) : 1995 International Eiectrotechnical Vocabulary Chapter 7 16- 1. Integrated Services Digital Network (ISDN) Part 1 : General Aspects, issued by the International Electrotechnical Commission (IEC), was adopted by the Bureau of Indian Standards on the recommendation of Radio Communications Sectional Committee, LTD 20 and approval of the Electronics and Telecommunications Division Council.

The text of the IEC standard has been approved as suitable for publication as Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

Only the English language text in the International Standard has been retained while adopting it in this Indian Standard.

-IS 1885 ( Part 82 ) : 1996

-CHAPTER 716 : INTEGRATED SERVICES DIGITAL NETWORK ( ISDN ) - PART 1: GENERAL ASPECTS

7164141

7164102

7164143

7164144

716-0105

7160146

7160147

7164~108

7164149

SECTION 716-Ol- GENERAL TERMS

integrated services network ISN ( abbreviation )

A network that provides or supports a range of different telecommunication services.

integrated digital transmission and switching

The direct digital interconnectionof digital transmission and digital switching equipment, in order to provide a continuous digital path.

(integrated) digital-network IDN ( abbreviation )

A set of digital nodes and digital links that uses integrated digital transmission and stvilching to provide digital connection-between two or more defined points.

integrated services digital network ISDN (abbreviation)

An integraled services network provided by means of an integrated digital network.

( network ) operator

An organization which operates a telecommunication network.

No Ie. - A network operator may be either an administration or a public or private organization.

user

Any entity ( for example, person, intelligent terminal, machine ) which makes normal usage of the services and/or facilities of a telecommunication network.

Note. - The person may either be a customer or be delegated by such customer or by the network operator. The terminal or machine may be operated by the customer or by the network operator.

interface

The common physical or conceptual boundary between two systems or between two parts of the same system.

physical interface

A mechanical, electricaj, electromagnetic and/or optical interface

Note. - A physical interface may, for example, be defined between two equipments or between equipment and cable.

physical interface specification

physical interface ( deprecated in this sense )

A formal statement of those characteristics of an interface necessary to ensure physical compatibility ofthe interconnections between two associated systems.

1 .

IS 1885 ( Part 82 ) : 1996

716-01-10 functional interface specification

A formal statement of those characteristics of an interface necessary to ensure functional compatibility of the interactions between two associated systems.

Note. - A functional interface specification usually includes the type, number, format and order of the interconnections and their interactions.

716-01-11

716-01-12

716-01-13

71Wl-14

7X-01-15

716-01-16 layer interface

The interface between adjacent layers of a hierarchy of layers.

716-01-17 pnmcol

716-01-18

716-01-19

716-01-20

interface specification

A formal statement of those characteristics of an interface necessary to ensure total ( i. e. physical and functional ) compatibility between two associated systems.

Nofe. -For total compatibility the interface specification should include thephysical intersace spect>cution and the functional interface specification.

functional group

functional grouping ( deprecated )

A predetermined set of functions that may be performed by one or more equipments.

reference point

A virtual point at the interfuce between two non-overlapping functional groups

reference configuration

A combination of functional groups and reference points that defines a particular telecommmtication network arrangement.

Note. - A reference configuration may, for example, be used for allocating performance parameters.

layer level (deprecated in this sense )

The set of functions between an upper and lower boundary, within a logical hierarchy of !imctions,which set serves a different purpose from an adjacent set. and provides service to any higher set.

Note. - The open systems interconnection reference model has seven layers.

A defined set of procedures adopted to ensure communication between sets of processes which exist within the same layer of a hierarchy of layers.

user-to-user protocol

A protocol adopted by two or more users to ensure communication between them

ISDN protocol reference model

A conceptual arrangement of functions andprotocols which may. for example, be used to model information flows, including user and control infomration, between users and an ISDN.

open systems interconnection ( reference model)

0% ( abbreviation )

A hierarchical organization of the relationships, arranged in seven layers, between a telecommunication network, its users and the telecommunication services that the network can offer. 2

IS 1885 ( Part 82 ) : 1996

71641-21 lower layer functions

LLF (abbreviation)

Those functions which are concerned mainly with transmission, synchronization, routeing and switching.

Note. - By convention, the lower layer functions are layers 1 or 3 of the open systems interconnection reference model.

716-01-22 higher layer functions

HLF ( abbreviation )

Those functions which are concerned mainly with information handling, storing and processing.

Note. - By convention, the higher layer functions are layers 4 to 7 of the open systems interconnection reference model.

71641-23 loopback

test loop

A device incorporated in a terminal equipment or at a given point inthenehvork for redirecting the information flow in the opposite direction from the receive path to the corresponding transmit path at this point, for testing purposes from a control point.

3

IS 1885 ( Part 82 ) : 1996

SECTION 716-02 - SERVICES

7160201

7 164202

7 164243

716-0244

7 1642-05

7164I2-06

7 164247

7164208

7 160249

telecommunication service

An offering by one or more network operators to satis@ a specific telecommunication requirement.

Note. - Examples of a telecommunication service are bearer service and teleservice.

bearer service

A telecommunication service that~provides the capability for transmission of signals between user-network interfaces.

Note. - The ISDN connection type used to support a bearer service may be identical to that used to support other types to telecommunication services.

teleservices

A telecommunication service that provides the complete capability, including terminal equipment functions, for communication between users according to protocols established by the network operator or by agreement between network operators.

teleaction service

A telecommunication service for remote action by means of short messages requiring a very low transmission rate between the user and the network.

Note. - Examples of teleaction sewices are telealarm, telecommand, telemetry and telealerting.

demand (telecommunication ) service

A decommunication service established and terminated with the minimum of delay in response to a user request effected by means of user-network signalling.

reserved circuit ( telecommunication ) service

A telecommunication service made available during a time interval specified in advance by the user, and established and terminated during that interval in response to a user request effected by means of user-network signalling.

leased circuit service

private line service

permanent circuit (telecommunication) service

A telecommunication service made available for a prolonged period. in response to customer request effected by means of operational or administrative messages.

assigned circuit (telecommunication) service

A telecommunication service established and terminated as specified in advance by the customer and effected by means of operational or administrative messages.

Note. - Assigned circuit service may be specified on a regular basis, for example the same

hour each day or a particular set of hours each week.

~( telecommunication ) service attribute

A specified characteristic of a telecommunication service, the value of which may be used to distinguish that service from others.

IS 1885 ( Part 82 ) : 1996

SECTION 7 16-03 - NETWORKS

716-0341 connection

(701-03-01 MOD ) An association of transmission channels or telecommunication circuits, switching and other functional units set up to provide for the transfer of signals between two or more network points, to support a single communication.

7164342 digital connection

A connection permitting the transfer of digital signals.

716-03-03 exchange connection

A connection that is established through an exchange between two or more ports of that exchange

716-03-04 ISDN connection

A connection that is established through an integrated services digital network between two or more specified interfices of that network.

716-0345 ISDN connection attribute

A specified characteristic of an ISDN connection, the value of which may be used to distinguish that connection from others.

7164346 ISDN connection type

A set of ISDN connection having a common classification according to one or more ISDN connection attributes.

7164347 ISDN connection element

A part of an ISDN connection having stated values of one or more ISDN connection attributes.

716-0348 point-t&point ISDN connection

An ISDN connection that is established between two specified interfaces.

716-03-09 point-to-multipoint ISDN conn&ion

An ISDN connection that is established between a specified interfice and more than one other specified interfaces.

716-03-10

716-03-l 1

716-03-12

716-03-13

address

The network number followed by the appropriate sub-address, if any.

(network) number

An indentity of a user-network interface.

sub-address

The identity of a terminal, process or group of terminals within a large group of such items at a user-netwrok interface.

numbering

The assignment of a network number to each user-network interface.

5

IS 1885 ( Part 82 ) : f996

71603-14 addressing

The process by which a calling user indicates tZe identity of the called user on each call attempt.

71643-U sub-addressing

A process by which a calling user indicates the identity of a terminal, process or group of terminals within a larger group identified by a nehJork number.

6

IS 1885 (Part 82 ) : 1996

SECTION 716-04 - ACCESS

716GMIl user-network access

The means by which a user is connected to a telecommunicationnetwork in order to use the services and/or facilities of that network.

716-0442 access channel

channel (deprecated in this sense)

A designated part of the information transfer capability, having specified characteristics, provided at the user-network interface.

Notes.

I - In English, the term ‘transmission channel’ ( 704-14-02 ) is well understood to imply unidirectional working only, and then is commonly abbreviated to ‘channels’. To avoid confusion with this usage, the term ‘access channel’, which encompasses bidirectional working through the user-network interface must not be abbreviated to ‘channels’.

2 - An “access channel” may be qualified, for example, by H, B or D, in which case~it is appropriate to call it an H-channel, a B-channel or a D-channel.

716XI4-03 H-channel

An access channel indended to carry user information is standardized digital signals at a specified digit rate higher than 64 kbitis.

hro tes.

t- An H-channel is usually characterized by one or two indices:

- the first one refers to the channel digit rate; for example, an Ho-channel has a digit rate of 3 84 kbitls.

- the second if any, refers to the digital hierarchy; for example, an HI1 -channel has a digit rate of 1536 kbit/s, and an H,*-channel has a di,git rate of 1920 kbit/s.

2- A given H-channel may be subdivided into H-channels of lower digit rates, B-channels and/or D-channels.

71604-04 B-channel

A 64 kbitfs access channel intended to carry user information in standardized 64 kbitJs digital signals.

716-04-05 D-channel

An access channel intended primarily for user-network signalling purposes.

Notes.

1 - D-channels maybe used for user-to-user signalling and for the transmission of packetized data.

2 - D-channels~have beendefined with digit rates of 16 kbit/s and 64 kbit/s.

716-044)6

716-M-07

ISDN user-network intetface structure

The number and type of access channels that appear at a user-network interface of an integrated services digital network.

ISDN access capability

The number and type of the access channels at an ISDN user-network interfice that are actually available for telecommunication purposes.

7

IS 1885 ( Part 82) : 1996

7164448 tenuinal (equipment)

TE (abbreviation )

The functional group on lhe user side of a user-network interface.

Note. - Terminal equipment includes terminal(s), terminal adopter(s), and, if any, NT2 functional group.

7 1644-09

716-04-10

716-M-11

716-04-12

716&-13

716@-14

71604-15

716-04-16

716-04-17

716GL18

network termination

NT ( abbreviation )

The jiinctionaigroup on the network side of a user-network inter-ce.

Note. - A network termination always comprises a transmission part NT1 and optionally a switching part NT2.

lSDN terminal

A terminal which is directly compatible with an ISDN network termination.

terminaladapter

TA (abbreviation)

An equipment intended to match a non-ISDN terminal to an ISDN nehvork termination.

basic (rate) access

The basic standardized ISDN user-network interfice structure comprising two B-channels and one D-channel.

Note. -The digit rate ofthe D-channel in this interface structure is 16 kbit/s.

primary rate access

A standardized ISDN user-network interface structure utilizing the capacity of the primary level ofthe digital hierarchy, i. e. 1544 kbit/s or 2048 kbit/s digit rate.

Note. -The digit rate of any D-channel in this interface structure is 64 kbit/s.

multipoidt access

A user-network access in which several terminals share the same network termination.

access contention

A condition which occurs when multiple demands, made on a network termination in multipoint access, cannot be served simultaneously.

access contention resolution

A process intended to resolve successfully access contention in multipoint access.

user-network interface

UN1 (abbreviation)

In a telecommunication network, an interface between a terminal equipment and a network termination.

access protocol

Aprotocol, used at the user-network interface, to enable the user to employ the services and/ or facilities of a telecommunication network.

8

IS 1885 ( Part 82 ) : 1996

716-04-19 link access protocol

LAP (abbreviation)

A formal set of link synchronization and error control procedures to convey information across the user-network interface.

Note. - A link access protocol is assoiciated with the data link layer of the open systems interconnection refirence model.

IS 1885 ( Part 82 ) : 1996

INDEX

A

access channel.. .................................................. access contention .............................................. access contention resolution .............................. access protocol ..................................................

access, basic .......................................................

access, multipoint .............................................. access, primary rate ...........................................

access, user-network .......................................... address ............................................................... addressing .......................................................... assigned circuit service ....................................... assigned circuit telecommunication service ........ attribute, service ................................................ attribute, ISDN connection ................................

B

B-channel .......................................................... basic access ........................................................ basic rate access ................................................ bearer service .....................................................

C

channel (deprecated in this sense). ...................... connection ........................................................

contention, access .............................................

contention resolution, access .............................

D

D-channel .........................................................

d emand service ..................................................

demand telecommunication service .................... digital connection ..............................................

digital network. integrated .................................

digital network .................................................. digital network, integrated services .................... digital transmission and switching, integrated .....

E

exchange connection .........................................

F

functional interface specification ...................... functional group ................................................ functional _grouping (deprecated) ........................

H

H-channel .......................................................... higher layer functions .......................................... HLF (abbreviation) ............................................

I

IDN (abbreviation) ............................................ integrated services network ............................... integrated digital transmission and switching ...... integrated digital network ..................................

7 16-04-02

716-04-15

716-04-16

716-04-18

7 16-04-l 2

716-34-14 716-04-13

7 16-04-o 1 716-03-10

716-03-14 7 16-02-08

7 16-02-08

7 16-02-09

7 16-03-03

7 16-04-04

716-04-12

716-04-12

716-02-02

7 16-04-02

716-03-01

716-04-15

716-04-16

716-04-05

7 16-02-05

716-02-05

716-03-02

716-01-03

716-01-03

716-01-04 716-01-02

7 16-03-03

716-01-10 716-01-12 716-01-12

7 16-04-03 716-01-22 716-01-22

716-01-03 716-01-01 716-01-02 716-01-03

integrated services digital network ..................... interface ............................................................ interface specification ....................................... interface specification, physical ........................ interface specification, functional ...................... interface structure, 1SDN user-network ............... interface, layer .................................................. interface, physical ............................................. interface, user-network ...................................... ISDN (abbreviation) ........................................... ISDN access capability ....................................... ISDN connection ............................................... ISDN connection attribute ................................. ISDN connection type ....................................... ISDN connection element .................................. ISDN protocol reference model .......................... ISDN terminal .................................................... ISDN user-network inter&e structure ................ ISN (abbreviation) ..............................................

L

LAP (abbreviation) ............................................ layer .................................................................. layer interface .................................................... leased circuit service .......................................... level (deprecated in this sense) ........................... link access protocol ........................................... LLF (abbreviation) ............................................. loopback ............................................................ lower layer functions ..........................................

M

multipoint access . . . . . . . . . . . . . . . . ..__...................

N

network number ._... .._._ ,,... _,.,,.

716-01-04 716-01-07 716-01-l 1 716-01-09 716-01-10 7 16-04-06 716-01-16 716-01-08 716-04-17 716-01-04 7 16-04-07 716-04-03 716-03-05 7 16-03-06 7 16-03-07 716-01-19 716-04-1D 7 16-04-06 716-01-01

716-04-19 716-01-15 716-01-16 7 16-02-07 716-01-15 716-04-19 716-01-21 716-01-23 716-01-21

716-04-14

716-03-l 1 network operator ............................................. ., 7 L 6-O I-05 network termination .......................................... 7 16-04-09 NT (abbreviation) .............................................. 716-04-09 NT1 (abbreviation) ............................................ 7 16-04-09 NT2 (abbreviation) ............................................ 7 16-04-09 number ............................................................... 716-03-l 1 numbering .......................................................... 7 16-03-I 3

0

open systems interconnection reference model 7 16-O l-20 open systems interconnection ............................ 7 16-O l-20 operator ............................................................. 716-01-05 OS1 (abbreviation) ........................................... __, 7 16-O l-20

P

permanent circuit telecommunication service .... 716-02-07 permanent circuit service ................................... 7 16-02-07 physical interface ............................................... 7 16-O l-08 physical interface specification .......................... 7 16-O l-09 physical interface (deprecated in this sense) ....... 7 I 6-O I-09 point-to-.multipoint ISDN connection ............... 716-03-09 point-to-point ISDN connection ....................... 7 16-03-08 primary rate access ............................................ 716-04-13 private line service ............................................. 7 16-02-07 protocol ............................................................. 716-01-17 protocol, access ................................................. 7 I 6-04- 18 protocol, link access .......................................... 7 16-04-I 9

10

IS 1885 ( Part 82 ) : 1996

R

reference point .................................................. reference configuration ...................................... reference model, open systems interconnection reserved circuit telecommunication service ........ ... reserved cxcult service .......................................

s

service attribute ................................................. service. assigned circuit ...................................... servxe, bearer .................................................... service, demand ................................................. service, leased circuit ......................................... service, permanent circuit .................................. service, private line .......................................... service, reserved circuit ..................................... service, teleaction .............................................. service, telecommunication ............................... sub-address .................. ...................................... sub-addressing ....................................................

T

716-01-13 716-01-14 716-01-20 7 16-02-06 7 16-02-06

7 16-02-09 716-02-08 7 16-02-02 7 16-02-05 7 16-02-07 7 16-02-07 7 16-02-07 7 16-02-06 7 16-02-04 7 16-02-O 1 716-03-12 716-03-15

TA (abbreviation) .._........................................... TE (abbreviation) .._......................................... ._ teleaction service _.. . . .._ _._ ._. ,. ,. _. telecommunicatidn service . ._.._____._...._____.... telecommunication service attribute ._.......__..__... teleservice . . .._.. ___ ___ __ terminal . . . . . ._ _. _.. terminal adapter __..,........................................... terminal equipment . . . . . . . . . . . . . . . . . . . . . . . . . ..__........... test loop __._...........__........ . . . . . . . . . . . . . . . .._._..........

U

716-04-I 1 7 16-04-08 7 16-02-04 7 16-02-o 1 7 16-02-09 7 16-02-03 7 16-04-08 7 16-04-I 1 716-04-08 716-01-23

UN1 (abbreviation) ............................................ 716-04-17 user ................................................ ................... 716-01-06 user-network access ........................................... 7 16-04-o 1 user-network interface ....................................... 716-04-17 user-to-user protocol ......................................... 716-01-18

11

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This Indian Standard has been developed from Doe : No. LTD 20 ( 1367 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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