SIST ETS 300 182-1 E1:2005

SLOVENSKI STANDARD
SIST ETS 300 182-1 E1:2005
01-julij-2005
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Integrated Services Digital Network (ISDN); Advice of Charge (AOC) supplementary
service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol
specification
Ta slovenski standard je istoveten z: ETS 300 182-1 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 182-1 E1:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 182-1 E1:2005

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SIST ETS 300 182-1 E1:2005
EUROPEAN ETS 300 182-1
TELECOMMUNICATION April 1993
STANDARD
Source: ETSI TC-SPS Reference: T/S 46-33K
ICS: 33.080
ISDN, supplementary service
Key words:
Integrated Services Digital Network (ISDN);
Advice of Charge (AOC) supplementary service;
Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification
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 1993. All rights reserved.
New presentation - see History box

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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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Contents
Foreword.5
1 Scope .7
2 Normative references .7
3 Definitions.8
4 Symbols and abbreviations.9
5 Description .10
5.1 General description .10
5.2 Charging information at call set-up time (AOC-S).10
5.3 Charging information during the call (AOC-D) .10
5.4 Charging information at the end of the call (AOC-E).10
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.12
7.1 General.12
7.2 Coding of the Facility information element components.12
8 State definitions .17
9 Signalling procedures at the coincident S and T reference point .17
9.1 Activation, deactivation and registration.17
9.1.1 Normal operation.17
9.1.2 Exceptional procedures.18
9.2 Invocation and operation.19
9.2.1 Transfer of charging information in the call establishment phase.19
9.2.1.1 Normal operation.19
9.2.1.2 Exceptional procedures.20
9.2.2 Transfer of charging information in the Active state .20
9.2.2.1 Normal operation.20
9.2.2.2 Exceptional procedures.21
9.2.3 Transfer of charging information in the call clearing phase .22
9.2.3.1 Normal operation.22
9.2.3.2 Exceptional procedures.23
9.2.4 Transfer of charging information independent of a bearer at the user-
network interface .24
9.2.4.1 Normal operation.24
9.2.4.2 Exceptional procedures.24
10 Procedures for interworking with private ISDNs .25
11 Interactions with other networks .25
12 Interactions with other supplementary services .25
13 Parameter values (timers).25

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14 Dynamic description (SDLs) .25
Annex A (informative): Signalling flows .37
History .42

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ETS 300 182-1: April 1993
Foreword
This European Telecommunication Standard (ETS) has been produced by the Signalling Protocols and
Switching (SPS) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS 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) Advice of Charge (AOC)
supplementary service, as described below:
Part 1: "Protocol specification";
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) proforma specification for the user";
Part 5: "TSS&TP specification for the network";
Part 6: "ATS and partial PIXIT proforma specification for the network".
In accordance with CCITT Recommendation I.130, the following three level structure is used to describe
the supplementary telecommunications services as provided by European public telecommunications
operators under the pan-European Integrated Services Digital Network (ISDN):
- Stage 1: is an overall service description, from the user's standpoint;
- Stage 2: identifies the functional capabilities and information flows needed to support the service
described in stage 1; and
- Stage 3: defines the signalling system protocols and switching functions needed to implement the
service described in stage 1.
This ETS details the stage 3 aspects (signalling system protocols and switching functions) needed to
support the Advice of Charge (AOC) supplementary service. The stage 1 and stage 2 aspects are detailed
in ETSs 300 178-180 (1992) and ETS 300 181 (1993), respectively.
This reprint includes all previous Corrigenda as shown in the History box at the last page.

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1 Scope
This first part of ETS 300 182 specifies the stage three of the Advice of Charge (AOC) 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
CCITT Recommendation I.411 [1]) by means of the Digital Subscriber Signalling System No. one (DSS1).
Stage three identifies the protocol procedures and switching functions needed to support a
telecommunications service (see CCITT Recommendation I.130 [2]).
In addition, this standard specifies the protocol requirements at the T reference point where the service is
provided to the user via a private ISDN.
This standard does not specify the additional protocol requirements where the service is provided to the
user via a telecommunications network that is not an ISDN.
Three AOC supplementary services exist:
a) Charging information at call set-up time (AOC-S)
The AOC-S supplementary service enables a user to receive information about the charging rates at
call set-up time and also to receive further information during the call if there is a change of charging
rates.
b) Charging information during the call (AOC-D)
The AOC-D supplementary service enables a user to receive information on the recorded charges
for a call during the active phase of the call.
c) Charging information at the end of the call (AOC-E)
The AOC-E supplementary service enables a user to receive information on the recorded charges
for a call when the call is terminated.
The AOC supplementary service is applicable to all circuit-switched telecommunication services.
Further parts of this standard specify the method of testing required to identify conformance to this
standard.
This standard is applicable to equipment, supporting the AOC supplementary service, to be attached at
either side of a T reference point or coincident S and T reference point when used as an access to the
public ISDN.
2 Normative references
This standard 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 standard only when incorporated in it by amendment or revision. For undated references, the
latest edition of the publication referred to applies.
[1] CCITT Recommendation I.411 (1988): "ISDN user-network interfaces -
Reference configurations".
[2] CCITT Recommendation I.130 (1988): "Method for the characterisation of
telecommunication services supported by an ISDN and network capabilities of an
ISDN".
[3] CCITT Recommendation I.112 (1988): "Vocabulary of terms for ISDNs".

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[4] CCITT Recommendation I.210 (1988): "Principles of telecommunication services
supported by an ISDN and the means to describe them".
[5] ETS 300 102-1 (1990): "Integrated Services Digital Network (ISDN); User-
network interface layer 3; Specification for basic call control".
[6] ETS 300 178 (1992): "Integrated Services Digital Network (ISDN); Advice of
Charge: charging information at call set-up time (AOC-S); Service description".
[7] ETS 300 179 (1992): "Integrated Services Digital Network (ISDN); Advice of
Charge: charging information during the call (AOC-D); Service description".
[8] ETS 300 180 (1992): "Integrated Services Digital Network (ISDN); Advice of
Charge: charging information at the end of the call (AOC-E); Service
description".
[9] CCITT Recommendation X.208 (1988): "Specification of Abstract Syntax
Notation One (ASN.1)".
[10] CCITT Recommendation X.219 (1988): "Remote Operations: Model, Notation
and Service Definitions".
[11] ETS 300 196-1 (1993): "Integrated Services Digital Network (ISDN); Generic
functional protocol for the support of supplementary services; Digital Subscriber
Signalling System No. one (DSS1) protocol; Part 1: Protocol specification".
[12] ETS 300 195-1: "Integrated Services Digital Network (ISDN); Supplementary
service interactions; Digital Subscriber Signalling System No. one (DSS1)
protocol; Part 1: Protocol specification".
[13] CCITT Recommendation Z.100 (1988): "Functional Specification and Description
Language (SDL)".
3 Definitions
For the purpose of this standard, the following definitions apply:
Activation: implies either a user request for AOC supplementary service(s) or a network performed
activation of the subscribed AOC supplementary service(s) whenever the served user makes an outgoing
call.
NOTE 1: The stage 1 description, as specified in ETS 300 178 [6], ETS 300 179 [7] and
ETS 300 180 [8], defines activation as being performed at the time of subscription.
Basic communication: this charged item indicates the rate to be applied for the connection to the called
user.
Billing identification: elements for billing identification inform the served user that the associated charges
have been incurred due to the indicated situation (e.g. a call that has been forwarded at the served user's
access).
Call attempt: this charged item indicates the cost applied for a call which has been sent to the called user,
but the called user has not yet answered the call.
Call control message: a message as defined in ETS 300 102-1 [5], subclause 3.1, which on sending or
receipt causes a change of the call state at either the network or the user.
Call setup: this charged item indicates the cost applied for the connection to the called user when the
called user answers the call.

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Charging information: information sent to a user in an invoke component or a return result component
showing charging-related information (i.e. either charging rate information, special charging rates, or the
recorded charges for the call).
Continuous: see subclause A.2.3.1 of ETS 300 178 [6].
Flat rate: this specific rate indicates a fixed currency value per event.
Integrated Services Digital Network (ISDN): see CCITT Recommendation I.112 [3], § 2.3,
definition 308.
Invocation: implies the sending of charging information from the network to the served user.
NOTE 2: The stage 1 description, as specified in ETS 300 178 [6], ETS 300 179 [7] and
ETS 300 180 [8], defines invocation as either a user request for an AOC
supplementary service or as the network invocation for all calls.
Invoke component: see ETS 300 196-1 [11], subclause 8.2.2.1.
Network: the DSS1 protocol entity at the network side of the user-network interface.
Operation of supplementary services: this charged item indicates the cost applied for the operation of
requested supplementary services.
Recorded charges: this information indicates the number of charging units or currency units incurred for a
call.
Return error component: see ETS 300 196-1 [11], subclause 8.2.2.3.
Return result component: see ETS 300 196-1 [11], subclause 8.2.2.2.
Served user: the user of a particular ISDN number, who is requesting that charging information should be
provided (for all calls or on request).
Service: telecommunications service: see CCITT Recommendation I.112 [3], § 2.2, definition 201.
Special charging arrangement: this charged item indicates that a special charging arrangement exists for
calculating the cost of the call.
NOTE 3: The use of this charged item is outside the scope of the standard. It is a matter for the
network operator and the user to which it is sent.
Special charging code: this specific code indicates a rate which can identify a charging algorithm that can
be used as a basis for determining the cost of a call.
Step function: see subclause A.2.3.1 of ETS 300 178 [6]
Supplementary service: see CCITT Recommendation I.210 [4], § 2.4.
User: the DSS1 protocol entity at the user side of the user-network interface.
User-to-user information transfer: this charged item indicates the rate to be applied to the transfer of
user-to-user information.
4 Symbols and abbreviations
AOC Advice of Charge
AOC-D AOC during the call

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AOC-E AOC at the end of the call
AOC-S AOC at call set-up time
ASN.1 Abstract Syntax Notation One
DSS1 Digital Subscriber Signalling System No. one
ISDN Integrated Services Digital Network
PSTN Public Switched Telephone Network
5 Description
5.1 General description
Depending on subscription by the served user, charging information for any of the three supplementary
services may be provided either:
- for all calls; or
- for any call, after a user request to provide charging information.
The charging information given shall relate to the charges incurred on the network to which the user is
attached.
Charging information for applications using higher layer protocols which are not defined as teleservices,
shall be based on the bearer services specified.
5.2 Charging information at call set-up time (AOC-S)
When the AOC-S supplementary service is activated, the network shall provide the user with information
about the charging rates at call establishment. In addition, the network shall inform the served user if a
change in charging rates takes place during the call.
The network shall provide the charging information during call establishment or at the latest at call
connection. When there is a change in the charging rate during the call, the network shall send information
about the new charging rate to the served user.
5.3 Charging information during the call (AOC-D)
When the AOC-D supplementary service is activated, the network shall provide the user with charging
information for a call during the active phase of a call. The network shall provide the charging information
and transfer it to the served user in an appropriate message. The supplied charging information shall be
provided as a cumulative charge incurred so far for the call (i.e. charges recorded from the start of the call
and until the moment the charging information is sent to the served user).
When the call is released, the network shall send the recorded charges for the call to the served user in
one of the call control messages clearing the call.
If the network has determined that the call is free of charge, then the network shall send a free-of-charge
indication in the first subsequent message sent to the served user. The network shall not send any further
charging information during the call. When the call is released, the network shall send the charged amount
(zero) in a call control message clearing the call.
5.4 Charging information at the end of the call (AOC-E)
When the AOC-E supplementary service is activated, the network shall provide the served user with
charging information indicating the recorded charges for a call when the call is released. The network shall
send the charging information to the served user in one of the call control messages clearing the call.

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6 Operational requirements
6.1 Provision and withdrawal
These supplementary services shall be provided separately by arrangement with the service provider or be
generally available. Withdrawal of the service shall be made at subscriber request or for administrative
reasons.
The following subscription options exist for each of the three AOC supplementary services, as defined in
table 1.
Table 1: Advice of charge subscription options
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‡ Subscription options ‡  Value            ‡
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‡ Provision of service ‡  1. For all calls; or    ‡
‡            ‡                ‡
‡            ‡  2. On request on a per call ‡
‡            ‡   basis.          ‡
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6.2 Requirements on the originating network side
For the purpose of this standard, the served user of the AOC supplementary service is connected to the
originating network.
The originating network shall make available the type of charging information that is indicated, related to a
certain call.
The originating network shall assemble the appropriate charging information, according to the service
requirements, and send it to the user.
NOTE: The charging information may either be generated at the originating network, or
generated elsewhere and sent to the originating network, in due time for the information
to be provided to the user according to the procedures of this standard.
The network shall only include a charged item if the charged item contains information concerning the
charges applied to that call.
The network shall only use those charged items which are appropriate to that network charging
mechanism. Thus, in some networks, the network may, but need not, send some of these items, or
combinations of items. Different networks could give information about the same call in different ways.
If the served user suspends a call, then, as a network option, the originating network shall retain the
charging information for the suspended call as long as the network retains the call identity of the
suspended call of the served user.
6.3 Requirements on the destination network side
None identified.

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7 Coding requirements
7.1 General
The charging information that the network shall convey to the served user may consist of a number of
information units. The information to be transferred is specified in Clause 5 of the stage 1 service
descriptions ETS 300 178 [6], ETS 300 179 [7], and ETS 300 180 [8].
7.2 Coding of the Facility information element components
Table 2 shows the definition of the operations and errors required for the AOC supplementary service
using Abstract Syntax Notation one (ASN.1) as defined in CCITT Recommendation X.208 [9] and using the
OPERATION and ERROR macro as defined in CCITT Recommendation X.219 [10], figure 4/X.219.
The formal definition of the component types to encode these operations and errors is provided in
ETS 300 196-1 [11], Annex D, Clause D.1.
The inclusion of components in Facility information elements is defined in ETS 300 196-1 [11], subclause
11.1.
Table 2: ASN.1 description of AOC information
Advice-of-Charge-Operations {ccitt identified-organization etsi (0) 182 operations-and-errors (1)}
DEFINITIONS IMPLICIT TAGS ::=
BEGIN
EXPORTS ChargingRequest, AOCSCurrency, AOCSSpecialArr,
AOCDCurrency, AOCDChargingUnit, AOCECurrency, AOCEChargingUnit,
NoChargingInfoAvailable, ChargingAssociation;
IMPORTS OPERATION, ERROR
FROM Remote-Operation-Notation
{joint-iso-ccitt remote-operations (4) notation (0)}
notSubscribed, notAvailable, notImplemented, invalidCallState
FROM General-Errors
{ccitt identified-organization etsi (0) 196 general-errors (2)}
PartyNumber
FROM Addressing-Data-Elements
{ccitt identified-organization etsi (0) 196 addressing-data-elements (6)};
ChargingRequest ::= OPERATION
ARGUMENT ChargingCase
RESULT CHOICE {
AOCSCurrencyInfoList,
AOCSSpecialArrInfo,
chargingInfoFollows NULL}
ERRORS {notSubscribed, notAvailable, notImplemented,
invalidCallState, NoChargingInfoAvailable}
AOCSCurrency ::= OPERATION -- AOC-S given in currency units
ARGUMENT CHOICE {
chargeNotAvailable NULL,
AOCSCurrencyInfoList }

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Table 2: ASN.1 description of AOC information (continued)
AOCSSpecialArr ::= OPERATION -- AOC-S for special charging arrangement
ARGUMENT CHOICE {
chargeNotAvailable NULL,
AOCSSpecialArrInfo }
AOCDCurrency ::= OPERATION -- AOC-D given in currency units
ARGUMENT CHOICE {
chargeNotAvailable NULL,
AOCDCurrencyInfo }
AOCDChargingUnit ::= OPERATION -- AOC-D given in charging units
ARGUMENT CHOICE {
chargeNotAvailable NULL,
AOCDChargingUnitInfo }
AOCECurrency ::= OPERATION -- AOC-E given in currency units
ARGUMENT CHOICE {
chargeNotAvailable NULL,
AOCECurrencyInfo }
AOCEChargingUnit ::= OPERATION -- AOC-E given in charging units
ARGUMENT CHOICE {
chargeNotAvailable NULL,
AOCEChargingUnitInfo }
ChargingCase ::= ENUMERATED {
chargingInformationAtCallSetup (0),
chargingDuringACall (1),
chargingAtTheEndOfACall (2) }
AOCSCurrencyInfoList ::= SEQUENCE SIZE (1.10) OF AOCSCurrencyInfo
AOCSCurrencyInfo ::= SEQUENCE {
chargedItem ChargedItem,
CHOICE {
specificCurrency CHOICE {
durationCurrency [1] DurationCurrency,
flatRateCurrency [2] FlatRateCurrency,
volumeRateCurrency [3] VolumeRateCurrency},
specialChargingCode SpecialChargingCode,
freeOfCharge [4] NULL,
currencyInfoNotAvailable [5] NULL} }
AOCSSpecialArrInfo ::= INTEGER (1.10)
ChargedItem ::= ENUMERATED {
basicCommunication (0),
callAttempt (1),
callSetup (2),
userToUserInfo (3),
operationOfSupplementaryServ (4) }

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Table 2: ASN.1 description of AOC information (continued)
DurationCurrency ::= SEQUENCE {
dCurrency [1] Currency,
dAmount [2] Amount,
dChargingType [3] ChargingType,
dTime [4] Time,
dGranularity [5] Time OPTIONAL }
FlatRateCurrency ::= SEQUENCE {
fRCurrency [1] Currency,
fRAmount [2] Amount }
VolumeRateCurrency ::= SEQUENCE {
vRCurrency [1] Currency,
vRAmount [2] Amount,
vRVolumeUnit [3] VolumeUnit}
SpecialChargingCode ::= INTEGER (1.10)
AOCDCurrencyInfo ::= CHOICE {
specificCurrency SEQUENCE {
recordedCurrency [1] RecordedCurrency,
typeOfChargingInfo [2] TypeOfChargingInfo,
aOCDBillingId [3] AOCDBillingId OPTIONAL },
freeOfCharge [1] NULL}
AOCDChargingUnitInfo ::= CHOICE {
specificChargingUnits SEQUENCE {
recordedUnitsList [1] RecordedUnitsList,
typeOfChargingInfo [2] TypeOfChargingInfo,
aOCDBillingId [3] AOCDBillingId OPTIONAL },
freeOfCharge [1] NULL}
RecordedCurrency ::= SEQUENCE {
rCurrency [1] Currency,
rAmount [2] Amount }
RecordedUnitsList ::= SEQUENCE SIZE (1.32) OF RecordedUnits
TypeOfChargingInfo ::= ENUMERATED {
subTotal (0),
total (1)}
RecordedUnits ::= SEQUENCE {
CHOICE{
recordedNumberOfUnits NumberOfUnits,
notAvailable NULL},
recordedTypeOfUnits TypeOfUnit OPTIONAL }
AOCDBillingId ::= ENUMERATED {
normalCharging (0),
reverseCharging (1),
creditCardCharging (2)}

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Table 2: ASN.1 description of AOC information (continued)
AOCECurrencyInfo ::= SEQUENCE {
CHOICE {
specificCurrency SEQUENCE {
recordedCurrency [1] RecordedCurrency,
aOCEBillingId [2] AOCEBillingId OPTIONAL},
freeOfCharge [1] NULL},
chargingAssociation ChargingAssociation OPTIONAL}
AOCEChargingUnitInfo ::= SEQUENCE {
CHOICE {
specificChargingUnits SEQUENCE {
recordedUnitsList [1] RecordedUnitsList,
aOCEBillingId [2] AOCEBillingId OPTIONAL},
freeOfCharge [1] NULL},
chargingAssociation ChargingAssociation OPTIONAL}
AOCEBillingId ::= ENUMERATED {
normalCharging (0),
reverseCharging (1),
creditCardCharging (2),
callForwardingUnconditional (3),
callForwardingBusy (4),
callForwardingNoReply (5),
callDeflection (6),
callTransfer (7)}
Currency ::= IA5String (SIZE (1.10))
Amount ::= SEQUENCE {
currencyAmount [1] CurrencyAmount,
multiplier [2] Multiplier }
CurrencyAmount ::= INTEGER (0.16777215)
Multiplier ::= ENUMERATED {
oneThousandth (0),
oneHundredth (1),
oneTenth (2),
one (3),
ten (4),
hundred (5),
thousand (6)}
Time ::= SEQUENCE {
lengthOfTimeUnit [1] LengthOfTimeUnit,
scale [2] Scale }
LengthOfTimeUnit ::= INTEGER (0.16777215)

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Table 2: ASN.1 description of AOC information (concluded)
Scale ::= ENUMERATED {
oneHundredthSecond (0),
oneTenthSecond (1),
oneSecond (2),
tenSeconds (3),
oneMinute (4),
oneHour (5),
twentyFourHours (6)}
VolumeUnit ::= ENUMERATED {
octe
...