SIST EN 300 286-1 V1.2.4:2005

SLOVENSKI STANDARD
SIST EN 300 286-1 V1.2.4:2005
01-april-2005
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Integrated Services Digital Network (ISDN); User-to-User Signalling (UUS)

supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol;

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Intellectual Property Rights...................................................................................................................... 5

Foreword................................................................................................................................................ 5

1 Scope ........................................................................................................................................... 7

2 Normative references..................................................................................................................... 7

3 Definitions.................................................................................................................................... 8

4 Abbreviations................................................................................................................................9

5 Description ................................................................................................................................. 10

5.1 Service 1............................................................................................................................................................10

5.2 Service 2............................................................................................................................................................10

5.3 Service 3............................................................................................................................................................11

6 Operational requirements ............................................................................................................. 11

6.1 Provision and withdrawal..................................................................................................................................11

6.2 Requirements on the originating network side....................................................................................................11

6.3 Requirements on the destination network side ...................................................................................................11

7 Coding requirements.................................................................................................................... 11

7.1 Coding of the Facility information element component ......................................................................................11

7.2 Definition of messages.......................................................................................................................................12

7.2.1 CONGESTION CONTROL .........................................................................................................................12

7.2.2 USER INFORMATION................................................................................................................................13

7.3 Definition of information elements.....................................................................................................................13

7.3.1 Congestion level...........................................................................................................................................13

7.3.2 More data .....................................................................................................................................................13

7.3.3 User-user......................................................................................................................................................14

8 State definitions........................................................................................................................... 15

9 Signalling procedures at the coincident S and T reference point ...................................................... 16

9.1 Service 1............................................................................................................................................................16

9.1.1 Activation, deactivation and registration......................................................................................................16

9.1.1.1 Service 1 - implicitly requested .............................................................................................................16

9.1.1.1.1 Normal operation..............................................................................................................................16

9.1.1.1.2 Exceptional procedures.....................................................................................................................17

9.1.1.2 Service 1 - explicitly requested..............................................................................................................17

9.1.1.2.1 Normal operation..............................................................................................................................17

9.1.1.2.2 Exceptional procedures.....................................................................................................................18

9.1.2 Invocation.....................................................................................................................................................19

9.1.2.1 Service 1 invocation during call establishment ......................................................................................19

9.1.2.1.1 Normal operation..............................................................................................................................19

9.1.2.1.2 Exceptional procedures.....................................................................................................................19

9.1.2.2 Service 1 invocation during call clearing...............................................................................................20

9.1.2.2.1 Normal operation..............................................................................................................................20

9.1.2.2.2 Exceptional procedures.....................................................................................................................21

9.2 Service 2............................................................................................................................................................21

9.2.1 Activation, deactivation and registration......................................................................................................21

9.2.1.1 Normal operation....................................................................................................................................21

9.2.1.2 Exceptional procedures ..........................................................................................................................21

9.2.2 Invocation.....................................................................................................................................................23

9.2.2.1 Normal operation....................................................................................................................................23

9.2.2.2 Exceptional procedures ..........................................................................................................................24

9.3 Service 3............................................................................................................................................................25

9.3.1 Activation, deactivation and registration......................................................................................................25

9.3.1.1 Service 3 request during call establishment............................................................................................25

9.3.1.1.1 Normal operation..............................................................................................................................25

9.3.1.1.2 Exceptional procedures.....................................................................................................................25

9.3.1.2 Service 3 request during the Active (N10, U10) call state .....................................................................27

9.3.1.2.1 Normal operation..............................................................................................................................27

9.3.1.2.2 Exceptional procedures.....................................................................................................................27

9.3.2 Invocation.....................................................................................................................................................28

9.3.2.1 Normal operation....................................................................................................................................28

9.3.2.2 Exceptional procedures ..........................................................................................................................28

9.3.3 Flow control.................................................................................................................................................29

9.3.3.1 Normal operation....................................................................................................................................29

9.3.3.2 Exceptional procedures ..........................................................................................................................29

10 Procedures for interworking with private ISDNs ............................................................................ 29

11 Interaction with other networks ..................................................................................................... 30

11.1 Interworking with an ISDN network supporting only a maximum User-user information element length of

35 octets.............................................................................................................................................................30

11.2 Interaction with non-ISDN .................................................................................................................................30

12 Interaction with other supplementary services................................................................................ 30

13 Parameter values (timers)............................................................................................................. 30

14 Dynamic description (SDL diagrams)............................................................................................ 30

14.1 Service 1............................................................................................................................................................32

14.1.1 User..............................................................................................................................................................32

14.1.2 Network........................................................................................................................................................36

14.2 Service 2............................................................................................................................................................42

14.2.1 User..............................................................................................................................................................42

14.2.2 Network........................................................................................................................................................45

14.3 Service 3............................................................................................................................................................51

14.3.1 User..............................................................................................................................................................51

14.3.2 Network........................................................................................................................................................56

Annex A (informative): Signalling flows ...................................................................................... 63

A.1 Service 1, implicit request, point-to-multipoint............................................................................... 64

A.2 Service 1, implicit request, point-to-point ...................................................................................... 67

A.3 Service 1, explicit request, point-to-multipoint............................................................................... 69

A.4 Service 1, explicit request, point-to-point ...................................................................................... 73

A.5 Service 2 .................................................................................................................................... 75

A.6 Service 3, request during call establishment, point-to-multipoint ..................................................... 77

A.7 Service 3, request during the Active (N10, U10) call state.............................................................. 78

A.8 Service 3, flow control................................................................................................................. 79

Annex B (informative): Diagrammatic description of coding requirements ................................. 80

B.1 UUS request invoke component (typical example) ......................................................................... 80

B.2 UUS return result component (typical example) ............................................................................. 81

B.3 UUS return error component (typical example) .............................................................................. 81

Annex C (informative): Changes with respect to the previous ETS 300 286-1 ............................. 82

Annex D (informative): Bibliography........................................................................................... 83

History................................................................................................................................................. 84

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

SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect

of ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the

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 SR 000 314 (or the updates on the ETSI Web server) which

This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Signalling

The present document is part 1 of a multi-part standard covering the Digital Subscriber Signalling System No. one (DSS1)

protocol specification for the Integrated Services Digital Network (ISDN) User-to-User Signalling (UUS) supplementary

Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification";

Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user";

Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)

Part 5: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network";

Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)

In accordance with CCITT Recommendation I.130, the following three level structure is used to describe the

supplementary telecommunication services as provided by European public telecommunications operators under the pan-

- Stage 2: identifies the functional capabilities and information flows needed to support the service described in

- Stage 3: defines the signalling system protocols and switching functions needed to implement the service described

The present document details the stage 3 aspects (signalling system protocols and switching functions) needed to support

the UUS supplementary service. The stage 1 and stage 2 aspects are detailed in ETS 300 284 and ETR 285, respectively.

This first part of EN 300 286 specifies the stage three of the User-to-User Signalling (UUS) supplementary service for the

pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators

at the T reference point or coincident S and T reference point (as defined in ITU-T Recommendation I.411 [4]) by means

of the Digital Subscriber Signalling System No. one (DSS1) protocol. Stage three identifies the protocol procedures and

switching functions needed to support a telecommunication service (see CCITT Recommendation I.130 [2]).

In addition the present document specifies the protocol requirements at the T reference point where the service is

The present document does not specify the additional protocol requirements where the service is provided to the user via

The UUS supplementary service enables a user to send/receive a limited amount of information to/from another user over

The UUS supplementary service is applicable to all circuit-switched telecommunication services.

Further parts of EN 300 286 specify the method of testing required to identify conformance to the present document.

The present document is applicable to equipment supporting the UUS supplementary service to be attached at either side

of a T reference point or coincident S and T reference points when used as an access to the public ISDN.

a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in which

b) all versions up to and including the identified version (identified by "up to and including" before the version

c) all versions subsequent to and including the identified version (identified by "onwards" following the version

d) publications without mention of a specific version, in which case the latest version applies.

A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same

[2] CCITT Recommendation I.130 (1988): "Method for the characterisation of telecommunication

[3] ITU-T Recommendation I.210: "Principles of telecommunication services supported by an ISDN

[4] ITU-T Recommendation I.411 (1993): "ISDN user-network interfaces - Reference configurations".

[5] CCITT Recommendation X.25 (1988): "Interface between Data Terminal Equipment (DTE) and

Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected

[6] CCITT Recommendation X.208 (1988): "Specification of Abstract Syntax Notation One (ASN.1)".

[7] CCITT Recommendation X.219 (1988): "Remote Operations: Model, Notation and Service

[8] CCITT Recommendation X.244 (1988): "Procedure for exchange of protocol identification during

[9] CCITT Recommendation Z.100 (1988): "Specification and description language (SDL)".

[10] 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:

[11] EN 300 403-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System

No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 2:

[12] EN 300 195-1: "Integrated Services Digital Network (ISDN); Supplementary service interactions;

Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification".

[13] EN 300 196-1: "Integrated Services Digital Network (ISDN); Generic functional protocol for the

support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol;

call control message: A message as defined in EN 300 403-1 [10], subclause 3.1, which on sending or receipt causes a

change of the call state at either the network or the user. Call control messages also include the PROGRESS message but

NOTE: For the purposes of other standards, the information message may be considered as a call control message.

called user: A user that receives a call request which may include a request of the UUS supplementary service.

calling user: A user that initiates a call and may include a request of the UUS supplementary service in the call request.

contention: Contention exists when the called user has a point-to-multipoint arrangement and multiple responses to an

incoming call are sent to the network. These responses may carry different information related to the UUS supplementary

explicit request: An explicit request of a UUS supplementary service is one where the request is explicitly identified by

including a Facility information element with an appropriate component in either the SETUP or FACILITY message sent

by the served user. The explicit request requires an explicit response (acceptance or rejection).

implicit request: An implicit request of a UUS supplementary service is one where the request is implicitly identified by

including a User-user information element in the SETUP message sent by the served user.

Integrated Services Digital Network (ISDN): See ITU-T Recommendation I.112 [1], definition 308.

invoke component: See EN 300 196-1 [13], subclause 8.2.2.1. Where reference is made to an "xxxx" invoke component,

an invoke component is meant with its operation value set to the value of the operation "xxxx".

network: The DSS1 protocol entity at the network side of the user-network interface.

point-to-multipoint arrangement: In the context of the present document, a point-to-multipoint arrangement exists at the

called user's interface, if the network has the knowledge that the point-to-multipoint layer 3 procedures shall be applied at

the called user's interface. Consequently, responses from more than one terminal are accepted in case of an incoming call.

point-to-point arrangement: In the context of this standard, a point-to-point arrangement exists at the called user's

interface, if the network has the knowledge that the point-to-point layer 3 procedures shall be applied at the called user's

interface. Consequently, a response from only one user is accepted in case of an incoming call.

preferred request: A preferred request of a UUS supplementary service is one where the call setup shall continue even if

premature clearing: The calling or called user initiates call clearing before the call has reached the Active (N10, U10)

receiving user: The user receiving USER INFORMATION messages as part of service 2 or 3.

remote user: The user who receives a request for service 3 in the Active (U10) call state.

required request: A required request of a UUS supplementary service is one where the call setup shall be rejected if the

requesting user: The user who sends a request for the UUS supplementary service 3 in the Active (U10) call state.

return error component: See EN 300 196-1 [13], subclause 8.2.2.3. Where reference is made to an "xxxx" return error

component, a return error component is meant which is related to an "xxxx" invoke component".

return result component: See EN 300 196-1 [13], subclause 8.2.2.2. Where reference is made to an "xxxx" return result

component, a return result component is meant which is related to an "xxxx" invoke component".

sending user: The user sending USER INFORMATION messages as part of service 2 or 3.

served user: The user who is the requester of the UUS supplementary service. For service 1 and service 2, the served

user is always at the originating side. For service 3, the served user may be at the originating or the destination side.

service; telecommunication service: See ITU-T Recommendation I.112 [1], definition 201.

service 1: A form of the UUS supplementary service where UUI can be sent and received as part of call control messages

service 2: A form of the UUS supplementary service where UUI can be sent and received independently of call control

service 3: A form of the UUS supplementary service where UUI can be sent and received independently of call control