Isdn Suppl Services

8/8/2019 Isdn Suppl Services

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Wandel & Goltermann

Communications Test Solutions

ISDNSupplementary Services

ISDN

POCKET GUIDE

No. 1


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Visit our Web site for regular updates

on our test and measurement solutions:

http://www.wg.com


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Introduction

Number Identification Services

Multiple Subscriber Number (MSN).... .... .... ..... .... ..... .... .... 5

Direct-Dialling-In (DDI).... .... .... .... ..... .... .... ..... .... ..... .... .... 6

SUB-addressing (SUB) ............. ............. ............. ........... 7

Calling-Line Identification Presentation (CLIP) .................... 8

Calling-Line Identification Restriction (CLIR) ... ... ... ... ... ... ... . 9COnnected-Line identification Presentation (COLP) .... .. .. ... 10

COnnected-Line identification Restriction (COLR) ............. 11

Malicious Call IDentification (MCID).... ... ... ... ... ... ... ... ... ... . 12

Call Offering Services

Terminal Portability (TP)...... .... .... ..... .... ..... .... .... ..... .... ... 14Call Forwarding Unconditional (CFU)... ... ... ... ... ... ... ... ... ... 15

Call Forwarding Busy (CFB).... .... .... ..... .... ..... .... .... ..... ... 16

Call Forwarding No Reply (CFNR) ... ... ... ... ... ... ... ... ... ... ... . 17

Call Deflection (CD)........ .... .... .... ..... .... .... ..... .... ..... .... .. 18

Call Completion Services

Call Waiting (CW).... ............. ............. ............. ............. 19

Call HOLD (HOLD)............. ............. ............. ............. .. 21

Multiparty

CONFerence calling (CONF) ..... .... .... ..... .... ..... .... .... ..... . 22

Three-PartY service (3TPY) ..... .... ..... .... .... ..... .... ..... .... ... 24

Community of Interest

Closed User Group (CUG).... .... ..... .... .... ..... .... ..... .... .... . 26

Charging Services

Advice Of Charge (AOC) ............. .............. ............. ..... 27

Additional Transfer Information Services

User-to-User Signaling (UUS) .... .... .... ..... .... ..... .... .... ..... . 28

Table of contents


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1

Introduction

Three types of services are defined by the CCITT : bearer

services, teleservices, and supplementary services.

Bearer services provide the means of conveying information

(speech, data, video etc.) between users in real time without

altering the content of the message. These services corres-

pond to the lower three layers of the OSI model.Teleservices combine the transportation function with the

information-processing functions, which correspond to OSI

layers 4 through 7. Example of teleservices are telephony,

teletex and videotex.

Both bearer services and teleservices may be enhanced by

supplementary services.

A supplementary service is used in conjunction with one or

more of the bearer services or teleservices. It cannot be used

alone. Each supplementary service is used in a uniform

fashion, regardless of the bearer service or teleservice that it

supports. The following table sums up the main supplemen-

tary services that have been defined so far. All of these origi-

nated in the telephone world. However, most of them can also

be applied to packet-mode services and to some teleservices.

This guide has been made to help users understand the main

supplementary services used today and the test principle

proposed by WG with the IBT range. WG always try to give

the best solution for a complete and safe test. This is why the

IBT range is regularly updated with new and advanced tests

on the described or future supplementary services. Each IBTproduct is easily upgradable in the field in order to ensure

that each user always has the best solution.


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Number Identifica tion Service s

Call Offering Services

Allows multiple ISDN numbers to be assigned to a

single interface (e.g. multiple phone numbers at thesame location).

Enables the user to call another user direct on anISDN-compatible PBX (Private Branch Exchange) or

Centrex (Central Exchange), without operator inter-

vention, or to call a terminal selectively on a passive

bus.

Called-party service that provides the ISDN number of

the calling party.

Calling-party service that restricts disclosure of thecalling partys ISDN number to the called party.

Calling-party service that provides the ISDN number

of the party to whom the caller is connected.

Connected-party service that restricts disclosure of

the connected partys number to the calling party.

A user engaged in an active call can adjourn andresume the call at a later time, for instance to move a

terminal from one socket to another.

Enables a served user to have the network send all

incoming calls addressed to the served users ISDN

number to another number.

Enables a served user to have the network send inco-

ming calls addressed to the served users ISDN num-

ber to another number when this users line is busy.

Enables a served user to have the network send inco-ming calls addressed to the served users ISDN num-

ber to another number when there is no answer on theusers line.

Enables a user to transfer an established call to a thirdparty by requesting redirection before the connection.

Allows the called party (user) to expand his addres-sing capacity beyond the one given by the ISDN

number.

Enables an incoming call to be identified and

registered.

MSN

Multiple SubscriberNumber

DDI

Direct-Dialling-In

CLIP

Calling-LineIdentificationPresentation

CLIR

Calling-LineIdentificationRestriction

COLP

COnnected-LineidentificationPresentation

COLR

COnnected-LineidentificationRestriction

MCID

Malicious CallIDentification

TP

Terminal Portability

CFU

Call FowardingUnconditional

CFB

Call FowardingBusy

CFNRCall FowardingNo Reply

CD

Call Deflection

SUB

SUB-addressing


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I S D N

PBX

@ A1

@A3@A4

@A2

Description

The MSN supplementary service is used to assign multiple (but

not necessary consecutive) numbers to a single public or privateaccess. This enables the selection of one or more distinctterminals linked to the same access with different subscriberparameters.The maximum number of MSNs per access is a network option.

IBT range te st principle(IBT-5, IBT-10 and IBT-20)

A self-call is initiated for each number assigned to theaccess. Each outgoing SETUP contains the current calledaddress in the Cld Information Element. The self-call isconsidered successful when the incoming SETUP containsa called address which is compatible with the calledaddress sent in the outgoing SETUP.

Set -up and operat ionThe call initiation procedure is the same as for basic services.The calling and called users perceive the same completionprocedures as for the basic service.

Provision and cance llat ion

as per the standardsThe MSN service is provided or cancelled by prior arrangementwith the service provider who allocates a set of ISDN numbersto the user interface.

Multiple

Subscriber Number

MSN

NumberIdentification

Serv

ices


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I S D N

Last digit(s) @ A2

PBX

@ A2

Description

The DDI supplementary service enables the user to call a user

on a private ISDN direct via a public ISDN by means of the publicnumbering plan.The network sends all or part of the ISDN number. If only part ofthe ISDN number is sent, it is the last part of this ISDN number.If only part of the ISDN number is sent by the network, this partis either a fixed number of digits applicable to all subscribers or,as a network option, a number of digits defined on a persubscriber basis.

Subscription to the DDI and MSN services is mutually exclusive.


Set -up and operat ion

Call initiation procedure is the same as for basic services.The calling and called users perceive the same completion

procedures as for the basic service.

A self-call is initiated for the ISDN numbers assigned to theaccess. Each outgoing SETUP contains the number to becalled in the Cld Information Element. The self-call isconsidered successful when the incoming SETUP containsa called address which is compatible with the calledaddress sent in the outgoing SETUP.

Provision and cance llat ionas per the standards

The DDI service is provided or cancelled by prior arrangementwith the service provider who allocates a set of ISDN numbers

to the user interface.

Direct

Dialling In

DDI


Serv

ices


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I S D N

BA

Sub @B Sub @B

SUB

Description

The SUB supplementary service allows the called party (user)

to expand his addressing capacity beyond the one givenby the ISDN number.If presented by the calling user, a sub-address is deliveredunchanged to the called (served) user.Among possible applications are:- Selection of, or declaration of a preference for, a specific terminal

at the called customers termination- Initiation of a specific process in a terminal at a called customers

termination.


The SUB test involves verifying that an incoming SETUPmessage is properly presented to the called party with theright sub-address.An automatic test makes a self-call with an outgoing SETUPmessage containing a fixed sub-address. The result of thetest depends on the decoding of the incoming SETUP (ana-lysis of the Called Sub-address Information).


Sub-address information can be provided by the calling userduring the call setup phase. The SUB supplementary service is

initiated when sub-address information is sent from the networkto the called user.

SUB-addressing

SUB


Serv

ices


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Serv

ices

I S D N

BA

Setup @A Setup @A

CLIP

Description

The CLIP supplementary service provides the called party with

a means of receiving calling party identification. In additionto the ISDN number, the calling line identity may include asub-address generated by the calling user and transportedtransparently by the network.The network delivers the calling line identity to the called partyduring call set-up regardless of the terminals ability to handlethe information.


Activation, de-activation and registration

The CLIP supplementary service is activated and de-activatedby the service provider. As per the standards, this supplementary

service requires no registration.

The CLIP test involves verifying that the calling addressis properly presented to the called party. Upon receptionof a SETUP message, the IBT displays the number of thecalling party.An automatic test makes a self-call with an outgoing SETUPcontaining a calling address, a numbering plan and a typeof number. The result of the test depends on the decodingof the incoming SETUP (analysis of the Clg InformationElement).

Calling Line

Identification Prese ntation

CLIP


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I S D N

BA

Setup @A Setup

CLIP

or notCLIR

Description

The CLIR supplementary service is a service offered to the

calling party. It restricts presentation of the calling partys ISDNnumber and sub-address information (if any) to the called party.As a network option, the CLIR can be offered with severaloptions: permanent mode (activated for all calls) or temporarymode (specified by the user on a call-by-call basis, with aestricted or not restricted presentation as a default mode).


The CLIR test involves verifying the SETUP contents.Upon reception of a SETUP message, the result of the testdepends on the decoding of the Presentation Indicator (PI)included in the Calling address Information Element.The IBT-10 and IBT-20 both call up the CLIR service(PI not implemented, presentation restricted or allowed).


The CLIR supplementary service is activated on provision andde-activated on cancellation. As per the standards, this supple-mentary service requires no registration.

Calling Line

Identification Restriction

CLIR


Serv

ices


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Serv

ices

I S D N

BA

Setup Setup

Connect @B Connect

COLP

Description

The COLP supplementary service provides the calling party

with a means of receiving connected party identification.The network delivers the connected line identity to the callingparty on call acceptance regardless of the terminals abilityto handle the information.



The COLP supplementary service is activated and de-activatedby the service provider. As per the standards, this supplementaryservice requires no registration.

COLP

The COLP test involves the decoding of an incomingCONNECT message in order to analyze the connected party

number Information Element. Upon reception of a connect mes-sage, the IBTs display the number of the connected party.An automatic test makes a self-call with an outgoingCONNECT message containing a connected address,a numbering plan and a type of number. The result of the testdepends on the decoding of the incoming CONNECT(analysis of the Cnd Information Element).

COnnected Line

identi fication Prese ntation


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I S D N

BA

Setup Setup

Connect Connect

COLPor Not COLR

Description

The COLR supplementary service is a service offered to the con-

nected party to prevent presentation of the connected partys ISDNnumber and sub-address information (if any) to the calling party.As a network option, the COLR can be offered with severaloptions: permanent mode (activated for all calls) or temporarymode (specified by the user on a call-by-call basis, with arestricted or not restricted presentation as a default mode).


The COLR test involves verifying the received CONNECTcontents. Upon reception of a CONNECT message,the resul t o f the test d ep ends on the dec od ing ofthe Presentation Indicator included in the ConnectedAddress Information Element.The IBT-10 and IBT-20 both enable dynamic implementationof the COLR service (PI not implemented, presentationrestricted or allowed).

Act ivat ion, dea ct ivation and registrat ion

The COLR supplementary service is activated on provision and

de-activated on cancellation. As per the standards, this supple-mentary service requires no registration.

COnnected Line

identi fication Restriction

COLR


Serv

ices


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Serv

ices

I S D N

A B

CalledCalling

MCID request-inv

MCID request-rr

Communication

Description

IBT range te st principle(IBT-10 and IBT-20)

Using the monitor mode together with the WindowsTM PCDetailed Decoder, the following User/Network exchangesare analyzed.

The MCID supplementary service enables an incoming call to be

identified and registered. The following call information is registered:- Called party number,- Calling party number,- Local time and date of the set-up in the network serving the

called user,- Calling party sub-address (service option).The information is not available to the terminal equipment (calledand calling users), but is stored at a location under the control of

the network operator.The MCID can either be set up during the active phase of thecall, or for a limited period after the active phase (but never aftercall termination by the served user).


The MCID supplementary service is available by prior arrangementwith the service provider. Cancellation is at the request of thesubscriber or for service provider reasons. As a network option,a subscription option may be provided to enable automaticset-up of the MCID supplementary service on unanswered calls

to the served user.

MCIDMalicious Call

IDentification


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MCID

Successful MCID supplementary service invocation duringthe Active state.

Successful MCID supplementary service invocation duringthe Disconnect Indication state.

Malicious Call

IDentification

SETUP (CR 1)

CONN (CR 1)

NETWORK User

NETWORK User

CONN ACK (CR 1)

FAC (CR 1, mCIDreq-inv)

FAC (CR 1, mCIDreq-rr)

SETUP (CR 1)

CONN (CR 1)

CONN ACK (CR 1)

DISC (CR 1)

REL (CR 1)

REL COMP (CR 1)

FAC (CR 1, mCIDreq-inv)

FAC (CR 1, mCIDreq-rr)


Serv

ices


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CallOfferingServices

I S D N

Suspend

Suspend Ack

Resume Ack

Resume

Description

A user can adjourn an active call through an appropriate

signaling procedure and resume the call later on. The TPsupplementary service allows a user to implement the followingactions during the active phase of a call :- Replace one terminal by another compatible terminal at the

same socket,- Move from one terminal to another compatible terminal within

a basic access,- Suspend the call and subsequently resume it at the same

terminal and at the same socket,- Move a terminal from one socket to another one.



A user wishing to call up the TP service sends an appropriaterequest. The network must store the call identity value, preservethe relevant B channel, maintain the connection and send anacknowledgement. To resume the call, the user sends a requestcontaining the call identity (if any). The network then re-esta-blishes the call and sends an acknowledgement.

TP

An automatic test makes a self-call followed by a SUSPENDmessage and a RESUME message. The result of the testdepends on the reception of the incoming SUSPEND ACKand RESUME ACK messages.

Terminal Portability


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I S D N

Setup

Setup

Description

The CFU supplementary service enables a served user to have

the network send all incoming calls or calls associated witha specified basic service and addressed to the served usersISDN number, to another number. The maximum number ofdiversions (CFB, CFU, CFNR, CD) of a single call is a networkoption with an upper limit of 5.


During the automatic test, the service is activated andde-activated, then the network response is analyzed.The test is considered as successful if both activation andde-activation have been satisfactorily completed. To activate(or de-activate) a call diversion supplementary service,a facility IE containing an activation (or de-activation)implementation component is included in a facility message.This component specifies that CFU is required.In addition, through the Generic Functional Protocol,the IBT-5 enables users to activate and de-activate CFUand interrogate the access configuration for this CallForwarding service.

Call

Forwarding Unconditionnal

CFU


The CFU supplementary service is available by prior arrangementwith the service provider. The service can be offered with foursubscriber options:- The served user receives notification that the call has been forwarded;- The calling user receives notification that the call has been forwarded;

- The served user receives notification that CFU is currently activated;- The served user releases his/her number to forwarded-to user.Cancellation is at the request of the subscriber or for serviceprovider reasons.



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Description

The CFB supplementary service enables a served user to have

the network send all incoming calls or calls associated witha specified basic service to another number if the served usersISDN number is engaged. The maximum number of diversions(CFB, CFU, CFNR, CD) of a single call is a network option withan upper limit of 5.

I S D N

SetupSetup

BUSY !


The CFB supplementary service is available by prior arrangementwith the service provider. The service can be offered with foursubscriber options:- The served user receives notification that the call has been forwarded;- The calling user receives notification that the call has been forwarded;

- The served user receives notification that CFB is activated;- The served user releases his/her number to forwarded-to user.Cancellation is at the request of the subscriber.


During the automatic test, the service is ac tivated andde-activated, then the network response is analyzed. The test isconsidered as successful if both activation and de-activationhave been satisfactorily completed. To activate (or de-activate)a call diversion supplementary service, a facility IE containingan activation (or de-activation) implementation component isincluded in a facility message. This component specifies thatCFB is required.In addition, through the Generic Functional Protocolthe IBT-5 enables users to activate and de-activate CFBand interrogate the access configuration for this CallForwarding service.

CFBCall

Forwarding Busy


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I S D N

Setup

Setup

Description

The CFNR supplementary service enables a served user

to have the network send all incoming calls or calls associatedwith a specified basic service to another number if there is noreply at the served users ISDN number. The maximum numberof diversions (CFB, CFU, CFNR, CD) of a single call is a networkoption with an upper limit of 5.


During the automatic test, the service is ac tivated andde-activated, then the network response is analyzed.The test is consid ered as succ essful if both activationand d e-activation have been successfully completed.To activate (or de-activate) a call diversion supplementaryservice, a facility IE containing an activation (or de-activation)implementation component is included in a facility message.This component specifies that CFNR is required.In addition, through the Generic Functional Protocolthe IBT-5 enables users to activate and de-activate CFNRand interrogate the access configuration for this CallForwarding service.

Call

Forwarding No Reply

CFNR


The CFNR supplementary service is available by prior arrange-ment with the service provider. The service can be offered withfour subscriber options:- The served user receives notification that the call has been forwarded;

- The calling user receives notification that the call has been forwarded;

- The served user receives notification that CFNR is currently activated;- The served user releases his/her number to forwarded-to user.

The value for the no reply timer is fixed or changed by the service

provider. Cancellation is at the request of the subscriber orfor service provider reasons.



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Description

The CD supplementary service enables the served user

to respond to an incoming call by requesting redirection ofthat call to another user. The CD supplementary service can onlybe invoked before the connection is established by the serveduser.The maximum number of diversions (CFB, CFU, CFNR, CD)of a single call is a network option with an upper limit of 5.

I S D NSetup

Setup

redirection


The CD supplementary service is available by prior arrangementwith the service provider. The service can be offered with one

or both of two subscriber options: the calling user receivesnotification that the call has been deflected and the servedusers ISDN number can be presented to the deflected-touser. Cancellation is at the request of the subscriber or forservice provider reasons.


Using the monitor mode together with the WindowsTM PCDetailed Decoder, the networks answer to a Call Deflectionrequest is analyzed. The result depends on the decodingof the Facility message (CallDeflection component).

CD

Call Def lection


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Alerting (CW)

All Channels BUSY

Setup

A B

I S D N

Call Waiting !

Setup(No-Channel)

Description

The CW supplementary service enables a user to be informed

of an incoming call with an indication that no channel is available.The user then has the choice of accepting, rejecting or ignoringthe waiting call.The CW supplementary service operates when all appropriate Bchannels in the subscriber terminal access are engaged.The network does not provide the subscriber with an audiblein-band tone but the terminal may generate an audible in-bandindication locally.

The maximum number of waiting calls is a network option.


Using the trace mode, the following User/Networkexchanges are analyzed.

Call Waiting

CW


The CW supplementary service is available by prior arrangementwith the service provider. Cancellation is at the request ofthe subscriber or for service provider reasons.

CallComple

tionServices


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CallComple

tionServices

Waiting Call acceptance. No B channel available.

Call Waiting

CW

SETUP SETUP (NO-CHANNEL, CR3)

ALERTING (CR3)

ALERTING (CR3)

CONNECT (CR3)

CONNECT ACK. (CR3, B1)

RELEASE (CR3)

RELEASE COMPLETE (CR3)

RELEASE COMPLETE

(CR3, #34)

ALERTING (CW)

Start

T-CW

Stop

T-CW

CONNECT

User B shall free access resources (i.e. a Bchannel) to accept a waiting call by eitherreleasing an existing call or using the callhold supplementary service on an existingcall.

User A NETWORK User B

TE1

(B1, CR1)

TE2

(B2, CR2)

TE3


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I S D N

HOLD

HOLD Ack

RETREIVE Ack

RETREIVE

Description

The HOLD supplementary service enables a user to interrupt

an existing call and then, if desired, re-establish the call.When the HOLD service is implemented, communication ona B channel is interrupted and the B channel is released fromuse by the existing call. A B channel is always available tothe terminal used to hold the call in order to retrieve the callfrom hold, originate a new call, retrieve another call or set upa connection to an incoming call (waiting call).

IBT range te st principle

(IBT-5, IBT-10 and IBT-20)

An automatic test makes a self-call followed by a HOLDmessage and a RETRIEVE message (sent on HOLD ACK).The result of the test depends on the reception of the inco-ming HOLD ACK and RETRIEVE ACK messages or on theREJECT cause decoding .

Call HOLD

HOLD


as per the standards

The HOLD supplementary service is available by prior arrangementwith the service p rovider or may generally be available.The HOLD service is a prerequisite for certain supplementaryservices such as Call Waiting or Three PartY supplementaryservices. Cancellation is at the request of the customer orfor administrative reasons. C

allComple

tionServices


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Multiparty

Description

The CONF supplementary service allows several users to

communicate with one another simultaneously.When the CONF supplementary service is implemented,conference resources (e.g. a bridge) are allocated to the serveduser. If set up from an active call, the CONF call will be automa-tically connected to the conference resources by the network.Once a conference is active, remote users may be added, dropped,isolated (i.e. prevented from communicating with the conference),reattached or split (i.e. removed from the conference but

still connected to the conference controller).

IBT range test principle (IBT-10 and IBT-20) :

CONFerence calling

Using the monitor mode together with the WindowsTM PCDetailed Decoder, the following User/Network exchangesare analyzed.

I S D NServed user

ConferenceResources

Remote users


as per the standardsThe CONF supplementary service is available by prior arrangementwith the service p rovider. Cancellation is at the request ofthe subsc riber or for service p rovider reasons. The CONFsupplementary service can be implemented from the Nullc all state or, ad d it ionally, as a network option from anexisting c al l in the Act ive c al l state.

CONF


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CONFerence calling

CONF

Multiparty

Served

user

SETUP (CR1) [FIE:beginConf-Inv]

CALL PROCEEDING (CR1)

CONNECT (CR1)[FIE:beginConf-RetRes (Cid)]

NETWORK

< (CR1)(Active, Idle) >

Beginning a conference from the Null call sate.


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Multiparty

Description

The 3TPY supplementary service enables the user to establish,participate in and control a three-way conversation (simultaneous

communication involving the served user and two remote users).During the three-way conversation, the served user can requestthat the network disconnects one of the remote users, terminatesthe three-way conversation or creates a private communicationwith one of the remote users.Either remote user can request that the network disconnectsthe connection.


Using the monitor mode together with the WindowsTM PC deco-der, the following User/Network exchanges are analyzed.


To activate a 3TPY supplementary service, the served userneeds two calls with the same CEI (Connection EndpointIdentifier) value. The first call has to be in Active-Held state and

the second call in Active-Idle state. A Begin3TPY implementationcomponent is included in a facility message sent to the network.When the network accepts the 3TPY, it allocates a 3TPY bridgeto provide the service and sends back a Begin3TPY resultcomponent within a facility message.

Three-PartY service

3TPY


The 3TPY supplementary service is provided to the user by priorarrangement with the network provider. Cancellation is at therequest of the subscriber or for service provider reasons.

I S D N

3TPY bridge

Remote users

Served user

A

B

c


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(CRx= Call A-B,

Active-Held connection)(CRy= Call A-B,

Active-Idle connection)

(CRx= Call A-B,Active-Held connection)

(CRy= Call A-B,

Active-Idle connection)

Facility (CRx, FIE: Begin

3TPY invoke)

NOTIFY

(Conf. establ.)

Connect three-way bridge

NOTIFY

(Conf. establ.)

Facility (CRx, FIE: Begin

3TPY return result)

User A NETWORK User B User C

Three-PartY service

3TPY

Multiparty


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CommunityofInterest

I S D N

CUG 02

CUG 01

Description

The CUG supplementary service is used to form groups with

restricted access. A specific user may be a member of oneor more closed user groups. Members of a specific closed usergroup can communicate with each other but not, in general,with users outside the group.Closed User Group members can, with special restrictions,make calls outside the group (Outgoing Access) and receivecalls from outside the group (Incoming Access).


The CUG service is implemented and the network responseis analyzed. To activate the CUG supplementary service,a facility IE containing a CUGCall implementation componentis included in the outgoing SETUP message.The result of the test depends on the decoding of theincoming SETUP (analysis of the CUGcall InformationElement).


Normal call establishment procedures apply to all calls onwhich the CUG service has been implemented. In addition,the network carries out internal checks to determine whether or

not a particular call is allowed between the two users concerned.

Closed

User Group

CUG


As a network option the CUG service can be offered with severalsubsc riber options (calls only, incoming access, outgoing

access, incoming and outgoing access).


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ChargingServices

I S D N

Connect

Setup

Facility

Description

If subscribed to by the served user, charging information for any

of the following three supplementary services may be providedeither for all calls or for any call (after a user request to providecharging information).- Charging information at the call set-up time (AOC-S) :Information is provided at the call establishment or connection(SETUP or CONNECT).

- Charging information during the call (AOC-D) :The cumulative charge is provided during the active phase.

- Charging information at the end of the call (AOC-E) :The recorded charge is provided when the call is completed.



The AOC supplementary service may be activated on a per-callbasis (active for the length of the call) or for all calls (in thiscase, the network automatically activates the subscribed AOCservice at each call setup).

Advice Of Charge

AOC

The AOC test involves verifying all Charging Info in a facilityIE received after activation of AOC services for S, D and E.The result of the test depends on the decoding of theCharging Info received.The IBT-10 and IBT-20 both enable dynamic selection of thecharge type per call. They then analyze the network answer(AOC type, charge type, granularity value, cost, units andtype of payment).


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2 8AdditionalTransfer

Inform

ationServices

I S D N

BA

UUS

User - User Information

Description

The UUS supplementary service enables the user to send/receive

a limited amount of user-generated information to/from another user.This information is carried transparently through the networkover the signaling channel corresponding to the call.The networkdoes not interpret or act upon this information. The informationis contained in either call control messages or in separate USERINFORMATION messages. The amount of information is limitedto 128 bytes per message (32 in some networks).


The IBT can send User-to-User Information and displaythe received message. A simple trace on a self-call providesa very easy means of testing the availab ility of the UUSsupplementary service.

User-to-User Signaling

UUS


The UUS supplementary service is provided to users by prior

arrangement with the network provider. No subscription is requiredfor the remote user. Cancellation can be implemented separatelyfor each service provided (UUI during setup and clearing, UUIin User Information messages during alerting or an active callphase), or globally for all the services.


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Wandel & GoltermannCommunications Test Solutions

Basic Rate AccessPrimary Rate Access

U and S/T interface

Protocol analysis

WindowsTM PC Detailed Decoder

Network simulationTerminal simulationError rate measurements (BERT)Trace

Test of services

Supplementary services test

Test of the B-channel availability

X.25 in D channelX.25 in B channel

WG IBT-5

ISDN Tester for Basic Rate AccessFor installation,

first level of commissioningand maintenance

WG IBT-10/ -10U

ISDN Tester/Analyzer forBasic Rate Access

For installation,commissioning

and maintenance

WG IBT-20

ISDN Tester/Analyzer forPrimary Rate AccessFor installation, commissioningand maintenance

ISDN Testing,For

weve gotthebest solutions.


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NOTES


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A closely linked network of more than 29 affiliated

companies and more than 65 agencies around the world

ensures that you receive the best possible advice in solving

specific test problems. For more detailed information,please turn to your local sales agency.

North AmericaCanada: Tel. +1-416 291-7121

USA: Tel. +1-919 941-5730

Mexico: Tel. +52-5 543 6644

Latin AmericaGuatemala/Central America

Caribbean Islands:Tel. +502-3 31 80 65

Brazil/Chile/Peru/Bolivia/Paraguay:

Tel. +55-11-5505 3266

AsiaChina: Tel. +86-10 6856 1034

India: Tel. +91-11 614 8537Singapore: Tel. +65-356 3246

Australia/Pacific Islands/New Zealand:

Tel. +61-39 690 6700

EuropeAustria: Tel. +43-22 52 85 521-0

France: Tel. +33-1 30 81 50 50

Germany: Tel. +49-7121 98 56 10Italy: Tel. +39-2 895 12381

Spain/Portugal: Tel. +34-1 383 9801Sweden: Tel. +46-8 449 48 00

United Kingdom: Tel. +44-1189 409200

For all other countries:Fax: 49-7121 86 13 33

email: [email protected]: //www.wg.com

WorldwideWandel&Goltermann

Isdn Suppl Services

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