ETSI ETS 300 175-9 ed.2 (1996-09)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 9: Public Access Profile (PAP)33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:ETS 300 175-9 E23SIST ETS 300 175-9:1998en01-MXQLM19983SIST ETS 300 175-9:1998SLOVENSKI
STANDARD
EUROPEANETS 300 175-9TELECOMMUNICATIONSeptember 1996STANDARDSecond EditionSource: ETSI TC-RESReference: RE/RES-03027-9ICS:33.060, 33.060.50Key words:DECT, PAP, radioRadio Equipment and Systems (RES);Digital Enhanced Cordless Telecommunications (DECT);Common Interface (CI);Part 9 : Public Access Profile (PAP)ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 92 94 42 00 - Fax: +33 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1996. All rights reserved.SIST ETS 300 175-9:1998

Page 2ETS 300 175-9: September 1996Whilst 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.SIST ETS 300 175-9:1998

Page 3ETS 300 175-9: September 1996ContentsForeword.91Scope.112Normative references.113Definitions and abbreviations.123.1Definitions.123.2Abbreviations.144Features for the public access service.154.1Description of the features.154.1.1Speech.154.1.2Bell on.154.1.3Bell off.154.1.4Off-hook.154.1.5On-hook (full release).154.1.6Partial release.154.1.7Dialled digits (basic).154.1.8Dialled digits (additional).164.1.9Dialling delimiter.164.1.10Dialling delimiter request.164.1.11Register recall.164.1.12Go to DTMF.164.1.13Go to pulse.164.1.14Pause (interdigit pause).164.1.15Specific trunk carrier selection.164.1.16Incoming call.164.1.17Hold call.164.1.18Re-connection of a held call.164.1.19Forced re-connection.164.1.20Authentication of PP.174.1.21Authentication of user.174.1.22Authentication of FP.174.1.23Silent polling.174.1.24Class of service field indication.174.1.25Inter-operator roaming registration.174.1.26Control of supervisory tones.174.1.27Regular security handshake.184.1.28Signalling of display characters.184.1.29Display control characters.184.1.30ZAP suspend.184.1.31ZAP terminate.184.1.32Alphanumeric text messaging and radiopaging service.184.1.33Voice and user data traffic encryption activation/deactivation.184.1.34Signalling traffic encryption activation/deactivation.184.1.35Debit public access service.184.1.36Credit public access service.184.1.37Credit agency public access service.194.1.38On-demand (hot-bill) public access service.194.1.39Advice of tariff request.194.1.40Advice of charge request.194.1.41Location registration for incoming calls, paging or messages.194.1.42Location de-registration for incoming calls, paging or messages.19SIST ETS 300 175-9:1998

Page 4ETS 300 175-9: September 19964.1.43Queue management.194.1.44Queue entry request.194.1.45Queue exit request.194.1.46"Portable part inaccessible" indication.194.1.47"In-range" indication.194.1.48Emergency service access request.204.1.49Indication of teleservices available request.204.1.50Indication of teleservices available.204.1.51Selection of service provider/network operator.204.1.52Selection of required teleservice.204.1.53Selection of bearer service.204.1.54Validation of PP user.204.1.55Validation of PP.204.1.56Validation of identity module.204.1.57User Personal Identification (UPI).204.1.58Group address.204.1.59Selection of additional character sets.214.1.60Data capability.214.1.61Keypad protocol for supplementary services.214.1.62Feature key management protocol for supplementary services.214.1.63Functional protocol for supplementary services.214.1.64Dial tone detection indication.214.1.65Request for indication of (temporary) subscriber number.214.1.66PP capability/FP capability data exchange.214.1.67Subscription registration user procedure (on-air).214.1.68Subscription registration user procedure (keypad).214.1.69Subscription registration user procedure (DECT authentication module).214.1.70Subscription data exchange (on-air).214.1.71Multicell FP coverage.224.1.72Handover.224.1.73Multiple subscription registration.224.1.74All-physical-channel capability.224.2Summary of DECT public access service facilities.235Effect of the services on the DECT layers.255.1Overview of the affected DECT layers.255.2Mapping of the features.275.2.1Speech.275.2.2Bell on.275.2.3Bell off.275.2.4Off-hook.285.2.5On-hook (full release).285.2.6Partial release.285.2.7Dialled digits (basic).285.2.8Dialled digits (additional).285.2.9Dialling delimiter.285.2.10Dialling delimiter request.285.2.11Register recall.285.2.12Go to DTMF.285.2.13Go to pulse.295.2.14Pause (interdigit pause).295.2.15Specific trunk carrier selection.295.2.16Incoming call.295.2.17Hold call.295.2.18Re-connection of a held call.295.2.19Forced re-connection.295.2.20Authentication of PP.295.2.21Authentication of user.295.2.22Authentication of FP.295.2.23Silent polling.30SIST ETS 300 175-9:1998

Page 5ETS 300 175-9: September 19965.2.24Class of service field indication.305.2.25Inter-operator roaming registration.305.2.26Control of supervisory tones.305.2.27Regular security handshake.305.2.28Signalling of display characters.305.2.29Display control characters.305.2.30ZAP suspend.305.2.31ZAP terminate.305.2.32Alphanumeric text messaging and radiopaging service.315.2.33Voice and user data traffic encryption activation/deactivation.315.2.34Signalling traffic encryption activation/deactivation.315.2.35Debit public access service.315.2.36Credit public access service.325.2.37Credit agency public access service.325.2.38On-demand (hot-bill) public access service.325.2.39Advice of tariff request.325.2.40Advice of charge request.325.2.41Location registration for incoming calls, paging or messages.325.2.42Location de-registration for incoming calls, paging or messages.325.2.43Queue management.325.2.44Queue entry request.335.2.45Queue exit request.335.2.46PP inaccessible indication.335.2.47In-range indication.335.2.48Emergency service access request.335.2.49Indication of teleservices available request.335.2.50Indication of teleservices available.335.2.51Selection of service provider/network operator.335.2.52Selection of required teleservice.335.2.53Selection of bearer service.335.2.54Validation of PP user.345.2.55Validation of PP.345.2.56Validation of identity module.345.2.57User identification.345.2.58Group address.345.2.59Selection of additional character sets.345.2.60Data capability.345.2.61Keypad protocol for supplementary services.345.2.62Feature key management protocol for supplementary services.345.2.63Functional protocol for supplementary services.345.2.64Dial tone detection indication.355.2.65Request for indication of (temporary) subscriber number.355.2.66Portable part capability/FP capability data exchange.355.2.67Subscription registration user procedure (on-air).355.2.68Subscription registration user procedure (keypad).355.2.69Subscription registration user procedure (DECT authentication module).355.2.70Subscription data exchange (on-air).355.2.71Multicell FP coverage.355.2.72Handover.355.2.73Multiple subscription registration.365.2.74All-physical-channel capability.366Requirements regarding the NWK layer.366.1Required procedures.366.1.1CC procedures.366.1.2MM procedures.376.1.3COMS procedures.376.1.4CLMS procedures.376.1.5LCE procedures.386.1.6Supplementary service procedures.38SIST ETS 300 175-9:1998

Page 6ETS 300 175-9: September 19966.1.7Management procedures.386.2Required messages in the PT and FT.386.3Required mandatory information elements.426.3.1Information elements in CC messages.436.3.2Information elements in CISS messages.476.3.3Information elements in MM messages.486.4Coding of information elements in CC messages.516.4.1Coding of mandatory information elements in CC messages.516.4.2Coding of optional information elements in CC messages.526.5Coding of information elements in MM messages.537Requirements regarding the DLC layer.537.1Control plane.537.1.1Minimum requirements.537.1.2Incoming call (feature 16).537.1.3Alphanumeric text messaging and radiopaging service (feature 32).547.2User plane.548Mandatory requirements regarding the MAC layer.548.1MAC layer services.548.1.1Connection oriented services.548.1.2Broadcast services.548.2MAC layer procedures.548.2.1Connection oriented service procedures.548.2.1.1General.548.2.1.2Antenna diversity in connection oriented services.558.2.1.2.1Q1 setting in direction PT to FT.558.2.1.2.2Antenna change due to FT receptionof Q1.558.2.1.2.3Antenna change due to poor quality on slot received at FT.558.2.1.3Information for handover.558.2.1.3.1Q1 and Q2 setting in direction FT toPT.558.2.1.3.2PT reception of Q1 and Q2.558.2.2Broadcast procedures.568.3Scrambling.568.4Required messages.568.4.1Header field.568.4.2Messages in the tail field.578.4.2.1Identities information (NT tail).578.4.2.2System information and multiframe marker (QT tail).578.4.2.3Paging (PT tail).578.4.2.4MAC control (MT tails).578.4.3Messages in the B-field.578.5Monitoring of speech quality.579MAC layer requirements for the optional features.589.1Incoming call (feature 16).589.2Alphanumeric text messaging and radiopaging service (feature 32).589.2.1Alphanumeric service via the MAC broadcast service (case A).589.2.2Alphanumeric service via the MAC C/L downlink service (case B1).599.2.3Alphanumeric service via the MAC C/L downlink and uplink services (caseB2).599.3Encryption (features 33 and 34).609.3.1Connection oriented service procedures.609.3.2System information and multiframe marker (QT tail).609.3.3MAC control (MT tails).609.4Selection of bearer service (feature 53).609.5TARI request.609.5.1Non-continuous broadcast procedure.61SIST ETS 300 175-9:1998

Page 7ETS 300 175-9: September 19969.5.2MAC control (MT tails).6110Requirements regarding the Physical Layer (PHL).6110.1General.6110.2Minimum Normal Transmit Power (NTP).6110.3Radio receiver sensitivity.6110.4Z-field.6110.5Sliding collision detection.6111Requirements regarding the speech transmission.6211.1General.6211.2User controlled volume control.6211.3PP ambient noise rejection capability feature.62Annex A (informative):Message sequence diagrams.63A.1Outgoing call establishment.63A.2Incoming call establishment.64A.3Release initiated by the fixed termination.64A.4Release initiated by the portable termination.65A.5Location registration.65Annex B (informative):Set-up attributes codings.66Annex C (informative):DECT standard authentication algorithm.67Annex D (informative):DECT standard cipher.68Annex E (informative):Relationship to DECT Generic Access Profile (GAP).69Annex F (informative):Bibliography.70History.71SIST ETS 300 175-9:1998

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Page 9ETS 300 175-9: September 1996ForewordThis second edition European Telecommunication Standard (ETS) has been produced by the RadioEquipment and Systems (RES) Technical Committee of the European Telecommunications StandardsInstitute (ETSI).This ETS forms part 9 of a series of 9 laying down the arrangements for the Digital Enhanced CordlessTelecommunications (DECT) Common Interface (CI).Part 1:"Overview".Part 2"Physical layer (PHL)".Part 3"Medium Access Control (MAC) layer".Part 4"Data Link Control (DLC) layer".Part 5:"Network (NWK) layer".Part 6:"Identities and addressing".Part 7:"Security features".Part 8:"Speech coding and transmission".Part 9:"Public Access Profile (PAP)".Further details of the DECT system may be found in ETR 015, ETR 043, and ETR 056 (see annex F).Transposition datesDate of adoption of this ETS:6 September 1996Date of latest announcement of this ETS (doa):31 December 1996Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1997Date of withdrawal of any conflicting National Standard (dow):30 June 1997SIST ETS 300 175-9:1998

Page 10ETS 300 175-9: September 1996Blank pageSIST ETS 300 175-9:1998

Page 11ETS 300 175-9: September 19961ScopeThis second edition European Telecommunication Standard (ETS) is part of the Digital Enhanced CordlessTelecommunications (DECT) Common Interface (CI) and specifies that set of technical requirements forDECT Fixed Parts (FPs) and Portable Parts (PPs) necessary for the support of the Public Access Service(PAS). It will also support other applications.Apparatus for which DECT PAS capability is claimed has to comply with those technical requirements ofthis ETS which are identified as provision mandatory.Apparatus claiming the provision of any optional service feature listed in this ETS has to fully comply withthe corresponding process mandatory technical requirements.2Normative referencesThis ETS incorporates, by dated or undated reference, provisions from other publications. These normativereferences are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to, or revisions of, any of these publications apply to this onlywhen incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies. [1]ETS 300 175-1 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 1:Overview".[2]ETS 300 175-2 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 2: PhysicalLayer (PHL)".[3]ETS 300 175-3 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 3: MediumAccess Control (MAC) layer".[4]ETS 300 175-4 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 4: DataLink Control (DLC) layer".[5]ETS 300 175-5 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 5: Network(NWK) layer".[6]ETS 300 175-6 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 6: Identitiesand addressing".[7]ETS 300 175-7 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 7: Securityfeatures".[8]ETS 300 175-8 (1996): "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT); Common Interface (CI); Part 8: Speechcoding and transmission".[9]I-ETS 300 176: "Radio Equipment and Systems (RES); Digital EnhancedCordless Telecommunications (DECT) Approval test specification".[10]CCITT Recommendation G.721 (1988): "32 kbit/s adaptive differential pulsecode modulation (ADPCM)".SIST ETS 300 175-9:1998

Page 12ETS 300 175-9: September 19963Definitions and abbreviations3.1DefinitionsFor the purposes of this ETS, the following definitions apply:antenna diversity: See ETS 300 175-1 [1].attach: See ETS 300 175-1 [1].authentication (of a subscriber): See ETS 300 175-1 [1].bearer handover: See ETS 300 175-1 [1].bearer service: See ETS 300 175-1 [1].broadcast: See ETS 300 175-1 [1].C-Plane: See ETS 300 175-1 [1].call: See ETS 300 175-1 [1].cell: See ETS 300 175-1 [1].cluster: See ETS 300 175-1 [1].connection handover: See ETS 300 175-1 [1].Connectionless mode (C/L): See ETS 300 175-1 [1].Connection Oriented mode (C/O): See ETS 300 175-1 [1].Cordless Radio Fixed Part (CRFP): See ETS 300 175-1 [1].coverage area: See ETS 300 175-1 [1].DECT Network (DNW): See ETS 300 175-1 [1].DLC data link (DLC link): See ETS 300 175-1 [1].DLC frame: See ETS 300 175-1 [1].double duplex bearer: See ETS 300 175-1 [1].End System (ES): See ETS 300 175-1 [1].external handover: See ETS 300 175-1 [1].Fixed Part (DECT Fixed Part) (FP): See ETS 300 175-1 [1].Fixed radio Termination (FT): See ETS 300 175-1 [1].fragment: See ETS 300 175-1 [1].fragmentation: See ETS 300 175-1 [1].frame: See ETS 300 175-1 [1].Global Network (GNW): See ETS 300 175-1 [1].SIST ETS 300 175-9:1998

Page 13ETS 300 175-9: September 1996handover: See ETS 300 175-1 [1].incoming call: See ETS 300 175-1 [1].intercell handover: See ETS 300 175-1 [1].internal handover: See ETS 300 175-1 [1].interoperability: See ETS 300 175-1 [1].interoperator roaming: See ETS 300 175-1 [1].Interworking Unit (IWU): See ETS 300 175-1 [1].intracell handover: See ETS 300 175-1 [1].intraoperator roaming: See ETS 300 175-1 [1].Local Network (LNW): See ETS 300 175-1 [1].location area: See ETS 300 175-1 [1].location registration: See ETS 300 175-1 [1].logical channel: See ETS 300 175-1 [1].Lower Layer Management Entity (LLME): See ETS 300 175-1 [1].MAC bearer (bearer): See ETS 300 175-1 [1].MAC connection (connection): See ETS 300 175-1 [1].network (telecommunication network): See ETS 300 175-1 [1].operator (DECT operator): See ETS 300 175-1 [1].outgoing call: See ETS 300 175-1 [1].paging: See ETS 300 175-1 [1].paging area: See ETS 300 175-1 [1].Portable Handset (PHS): See ETS 300 175-1 [1].Portable Part (DECT Portable Part) (PP): See ETS 300 175-1 [1].Portable radio Termination (PT): See ETS 300 175-1 [1].private: See ETS 300 175-1 [1].public: See ETS 300 175-1 [1].Public Access Profile (PAP): See ETS 300 175-1 [1].public access service: See ETS 300 175-1 [1].radio end point: See ETS 300 175-1 [1].Radio Fixed Part (RFP): See ETS 300 175-1 [1].SIST ETS 300 175-9:1998

Page 14ETS 300 175-9: September 1996Repeater Part (REP): See ETS 300 175-1 [1].roaming: See ETS 300 175-1 [1].roaming service: See ETS 300 175-1 [1].segment: See ETS 300 175-1 [1].segmentation: See ETS 300 175-1 [1].service provider (telecommunications service provider): See ETS 300 175-1 [1].sequencing (sequence numbering): See ETS 300 175-1 [1].Single Radio Fixed Part (SRFP): See ETS 300 175-1 [1].subscriber (customer): See ETS 300 175-1 [1].subscription registration: See ETS 300 175-1 [1].Supplementary Service (SS): See ETS 300 175-1 [1].TDMA frame: See ETS 300 175-1 [1].telecommunication: See ETS 300 175-1 [1].teleservice: See ETS 300 175-1 [1].TPUI domain: See ETS 300 175-1 [1].U-Plane: See ETS 300 175-1 [1].user (of a telecommunication network): See ETS 300 175-1 [1].Wireless Relay Station (WRS): See ETS 300 175-1 [1].3.2AbbreviationsFor the purposes of this ETS the following abbreviations apply.ADPCMAdaptive Differential Pulse Code ModulationARIAccess Rights IdentityC/LConnectionless modeC/OConnection Orientated modeCCCall ControlCICommon InterfaceCLMSConnectionless Message ServiceCOMSConnection Oriented Message ServiceC-PlaneControl PlaneCRFPCordless Radio Fixed PartDECTDigital Enhanced Cordless TelecommunicationsDLCData Link ControlDNWDECT NetworkDTMFDual Tone Multi-FrequencyESEnd SystemFPFixed PartFTFixed radio TerminationGNWGlobal NetworkIPUIInternational Portable User IdentitySIST ETS 300 175-9:1998

Page 15ETS 300 175-9: September 1996IWUInterworking UnitLCELink Control EntityLLMELower Layer Management EntityLNWLocal NetworkMMMobility ManagementPAPPublic Access ProfilePARKPortable Access Rights KeyPASPublic Access ServicePHLPhysical, layer 1 of the DECT protocol stackPHSPortable HandsetPPPortable PartPTPortable radio TerminationREPRepeater PartRFPRadio Fixed PartSRFPSingle Radio Fixed PartSSSupplementary ServicesTDMA Time Division Multiple AccessTMTest ManagementTPUITemporary Portable User IdentityUPIUser Personal IdentificationU-PlaneUser PlaneUTUpper TesterWRSWireless Relay Station4Features for the public access service4.1Description of the features4.1.1SpeechCircuit-mode 32 kbit/s unrestricted 8 kHz structured bearer service category suitable for speechinformation transfer (CCITT Recommendation G.721 (1988), [10]).4.1.2Bell onActivates bell or other user indication controlling process at the target apparatus.4.1.3Bell offDeactivates bell or other user indication controlling process at the target apparatus.4.1.4Off-hookThe ability to indicate the action of going off-hook, e.g. to start call set-up or accept a call.4.1.5On-hook (full release)The ability to indicate the action of going on-hook (e.g. to terminate a call) and fully release the radioresource.4.1.6Partial releaseThe ability to release an established call whilst retaining the radio resource for the purpose of accessingfurther services.4.1.7Dialled digits (basic)The capability to dial digits 0-9, *, #.SIST ETS 300 175-9:1998

Page 16ETS 300 175-9: September 19964.1.8Dialled digits (additional)The capability to dial digits A, B, C, D (in addition to the basic digits).4.1.9Dialling delimiterA means to generate or otherwise to indicate "end-of-destination-address" when dialling or transmittingdialled digits.4.1.10Dialling delimiter requestThe ability to advise that a dialling delimiter is required.4.1.11Register recallTo hold an existing call and seize a register (with dial tone) to permit input of further digits or other action.4.1.12Go to DTMFGo to DTMF signalling, with optional indication of Dual Tone Multi-Frequency (DTMF) tone duration.4.1.13Go to pulseGo to pulse (decadic) signalling.4.1.14Pause (interdigit pause)The ability to generate or indicate an inter-digit pause, e.g. to await further dial tone.4.1.15Specific trunk carrier selectionThe ability to select a specific trunk carrier for a call through a global network.4.1.16Incoming callA call received at a DECT PP.4.1.17Hold callThe ability to hold calls while other services are accessed.4.1.18Re-connection of a held callThe re-connection of a previously held call.4.1.19Forced re-connectionThe forced re-connection of a call which, e.g. has been left on hold for an excessive period of time.SIST ETS 300 175-9:1998

Page 17ETS 300 175-9: September 19964.1.20Authentication of PPThe process by which the identity of a DECT PP is checked by the FP.The standard (common) authentication algorithm shall be built-in to the cordless PP.The standard (common) authentication algorithm shall be accepted for authentication of roaming publicaccess service PP.User authentication key and authentication code to be supported.Time from initial request for service to completion of successful authentication process should not exceed 2seconds.4.1.21Authentication of userThe process by which the identity of a DECT user is checked by the FP.The User Personal Identification (UPI), a personal identification of 4 to 8 digits, manually entered by theuser via the keypad, is used for user authentication.4.1.22Authentication of FPThe process by which the identity of a FP is checked by the PP.It is optional to support the authentication of FT in both the PT and FT. If, however, ZAP, key managementor PP data amendment is implemented in the FT then it is mandatory in the FT to support authentication ofFT. The process is the same as that defined for authentication of PT.User authentication key and authentication code to be supported.NOTE:They are the same as those for PT, but different for each operator.4.1.23Silent pollingThe ability of a DECT FP to establish whether a specific PP is within range without alerting the user of thatPP.4.1.24Class of service field indicationIndication to the FP by the PP of the contents of its class-of-service field. The information passed acrossmay vary depending on the system/network/service provider with whom communication is currently made,as class-of service may vary from one subscription to the other.4.1.25Inter-operator roaming registrationThe ability to exchange inter-operator roaming data in real time over the air interface during the firstcall-attempt between the PP of a subscriber of a home DECT service provider A and the FP of a visitedDECT service provider B, assuming A and B have agreed to offer inter-operator roaming to theirrespective subscribers.4.1.26Control of supervisory tonesControl of a variety of supervisory (call progress) tones, which may be generated in the PP.For the public access service, network supervisory signals shall be made available in-band to the PP bythe FP, either by relay from the global or extended services network, or by local generation at the PP.The provision of a tone generator is optional for public access service PPs.SIST ETS 300 175-9:1998

Page 18ETS 300 175-9: September 19964.1.27Regular security handshakeRegular interchange of information (link identifier) between PP and FP during the period between linkinitiation and link termination to maintain link in normal operation and to reject unauthorised attempts toseize link. Interchange at intervals of the order of 1 second is acceptable.4.1.28Signalling of display charactersThe transmission to the PP of characters to be displayed on the user's PP display (if provided).4.1.29Display control charactersCharacters sent to the PP to control the user's display in the PP (if provided). Such characters includecursor control, clear screen, home, flash, inverse video etc.4.1.30ZAP suspendThe ability to re-program the account data held in the PP so that access rights are suspended subject tothe conditions set by the service provider being met, coupled with the ability to re-program the accountdata again to reinstate access rights once these conditions have been met. One ZAP field shall beprovided per account field. The PP has the right to authenticate the FP prior to the execution of ZAPsuspend.4.1.31ZAP terminateThe ability to re-program the account data held in the PP so that access rights are terminated and cannotbe reinstated except by following a full re-registration procedure. Applications for this include the casewhere a PP requests access after a subscription has been cancelled or after the PP has been reported aslost or stolen. The PP has the right to authenticate the FP prior to the execution of ZAP terminate.4.1.32Alphanumeric text messaging and radiopaging serviceThe ability to send short messages consisting of up to 120 characters of the default or other character setor initiate tones when not in-call or when in-call, with or without acknowledgement.4.1.33Voice and user data traffic encryption activation/deactivationThe activation or deactivation of the encryption process applied to voice or user data on the traffic channel.NOTE:This feature can be combined with signalling traffic encryption using a commonencryption process.4.1.34Signalling traffic encryption activation/deactivationThe activation or deactivation of the encryption process on signalling information.NOTE:This feature can be combined with voice and data traffic encryption using a commonencryption process.4.1.35Debit public access serviceA public access service system run on the basis of a PP being pre-loaded by some method with call-valuefor the system. A secure method of decrementing the call-value from the FP, under the control of the publicaccess service operator, is required.4.1.36Credit public access serviceA public access service system run on the basis of a PP being loaded by some means with identificationdata sufficient to enable the service provider to securely establish the account to which call charges are tobe attributed.SIST ETS 300 175-9:1998

Page 19ETS 300 175-9: September 19964.1.37Credit agency public access serviceA public access service system run on the basis of a PP being loaded by some means with identificationdata sufficient to enable the service provider to securely establish the account with a credit agency towhich call charges are to be attributed.4.1.38On-demand (hot-bill) public access serviceA public access service system runs on the basis of a PP being loaded by some means with identificationdata sufficient to enable the service provider t
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