SIST-TP CWA 16926-5:2023
(Main)Extensions for Financial Services (XFS) interface specification Release 3.50 - Part 5: Cash Dispenser Module Class Interface - Programmer's Reference
Extensions for Financial Services (XFS) interface specification Release 3.50 - Part 5: Cash Dispenser Module Class Interface - Programmer's Reference
This specification describes the functionality of an XFS compliant Cash Dispenser Module (CDM) Service Provider. It defines the service-specific commands that can be issued to the Service Provider using the WFSGetInfo, WFSAsyncGetInfo, WFSExecute and WFSAsyncExecute functions.
Persistent values are maintained through power failures, open sessions, close session and system resets.
This specification covers the dispensing of items. An “item” is defined as any media that can be dispensed and includes coupons, documents, bills and coins. However, if coins and bills are both to be dispensed separate Service Providers must be implemented for each.
All currency parameters in this specification are expressed as a quantity of minimum dispense units, as defined in the description of the WFS_INF_CDM_CURRENCY_EXP command.
There are two types of CDM: Self-Service CDM and Teller CDM. A Self-Service CDM operates in an automated environment, while a Teller CDM has an operator present. The functionality provided by the following commands is only applicable to a Teller CDM:
WFS_CMD_CDM_SET_TELLER_INFO
WFS_INF_CDM_TELLER_INFO
It is possible for the CDM to be part of a compound device with the Cash-In Module (CIM). This CIM\CDM combination is referred to throughout this specification as a “Cash Recycler”. For details of the CIM interface see [Ref. 3].
If the device is a Cash Recycler then, if cash unit exchanges are required on both interfaces, the exchanges cannot be performed concurrently. An exchange on one interface must be complete (the WFS_CMD_CDM_END_EXCHANGE must have completed) before an exchange can start on the other interface. The WFS_ERR_CDM_EXCHANGEACTIVE error code will be returned if the correct sequence is not adhered to.
The CIM interface can be used for all exchange operations on recycle devices, and the CIM interface should be used if the device has recycle units of multiple currencies and/or denominations (including multiple note identifiers associated with the same denomination).
Specifikacija vmesnika razširitev za finančne storitve (XFS), izdaja 3.50 - 5. del: Vmesnik razreda modula blagajniškega avtomata - Referenca za programerje
Ta specifikacija opisuje funkcionalnost ponudnika storitve modula blagajniškega avtomata (CDM), združljivega z razširitvami za finančne storitve (XFS). Določa ukaze, značilne za določeno storitev, ki jih je mogoče izdati ponudniku storitve s funkcijami WFSGetInfo, WFSAsyncGetInfo, WFSExecute in WFSAsyncExecute.
Stalne vrednosti se vzdržujejo z izpadi električne energije, odprtimi in zaprtimi sejami ter ponastavitvami sistema
Ta specifikacija zajema izdajo elementov. »Element« je opredeljen kot katero koli sredstvo, ki ga je mogoče izdati, ter vključuje kupone, dokumente, bankovce in kovance. V primeru izdaje tako kovancev kot bankovcev je treba implementirati ločene ponudnike storitev.
Vsi parametri valute v tej specifikaciji so izraženi kot količina najmanjših izdajnih enot, kot je opredeljeno v opisu ukaza WFS_INF_CDM_CURRENCY_EXP.
Obstajata dve vrsti modulov blagajniških avtomatov: samopostrežni in blagajniški modul. Samopostrežni modul blagajniškega avtomata deluje v avtomatiziranem okolju, pri blagajniškem modulu pa je prisoten upravljavec. Funkcionalnost, ki jo zagotavljata spodnja ukaza, se uporablja samo za blagajniški modul:
WFS_CMD_CDM_SET_TELLER_INFO
WFS_INF_CDM_TELLER_INFO
Modul blagajniškega avtomata je lahko del sestavljene naprave skupaj z modulom za unovčevanje (CIM). Kombinacija teh dveh modulov se v tej specifikaciji imenuje »modul za recikliranje gotovine«. Za podrobne informacije o vmesniku modula za unovčevanje glej [Ref. 3].
Če je naprava modul za recikliranje gotovine in je potrebna izmenjava gotovinske enote v obeh vmesnikih, tega ni mogoče izvesti sočasno. Izmenjava v enem vmesniku mora biti dokončana (ukaz WFS_CMD_CDM_END_EXCHANGE se mora zaključiti), preden se lahko začne izmenjava v drugem vmesniku. Če pravilno zaporedje ni upoštevano, se prikaže koda napake WFS_ERR_CDM_EXCHANGEACTIVE.
Vmesnik modula za unovčevanje je mogoče uporabiti za vse operacije izmenjave v napravah za recikliranje in naj bi se uporabljal, če naprava vključuje enote za recikliranje z več valutami in/ali oznakami (vključno z več napravami za prepoznavanje bankovcev, ki so povezane z isto oznako).
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST CWA 16926-5:2023
01-marec-2023
Specifikacija vmesnika razširitev za finančne storitve (XFS), izdaja 3.50 - 5. del:
Vmesnik razreda modula blagajniškega avtomata - Referenca za programerje
Extensions for Financial Services (XFS) interface specification Release 3.50 - Part 5:
Cash Dispenser Module Class Interface - Programmer's Reference
Ta slovenski standard je istoveten z: CWA 16926-5:2022
ICS:
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
35.240.15 Identifikacijske kartice. Čipne Identification cards. Chip
kartice. Biometrija cards. Biometrics
35.240.40 Uporabniške rešitve IT v IT applications in banking
bančništvu
SIST CWA 16926-5:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST CWA 16926-5:2023
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SIST CWA 16926-5:2023
CEN
CWA 16926-5
WORKSHOP
December 2022
AGREEMENT
ICS 35.200; 35.240.15; 35.240.40
English version
Extensions for Financial Services (XFS) interface
specification Release 3.50 - Part 5: Cash Dispenser Module
Class Interface - Programmer's Reference
This CEN Workshop Agreement has been drafted and approved by a Workshop of representatives of interested parties, the
constitution of which is indicated in the foreword of this Workshop Agreement.
The formal process followed by the Workshop in the development of this Workshop Agreement has been endorsed by the
National Members of CEN but neither the National Members of CEN nor the CEN-CENELEC Management Centre can be held
accountable for the technical content of this CEN Workshop Agreement or possible conflicts with standards or legislation.
This CEN Workshop Agreement can in no way be held as being an official standard developed by CEN and its Members.
This CEN Workshop Agreement is publicly available as a reference document from the CEN Members National Standard Bodies.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
Ref. No.:CWA 16926-5:2022 E
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Table of Contents
European Foreword . 5
1. Introduction . 9
1.1 Background to Release 3.50 . 9
1.2 XFS Service-Specific Programming . 9
2. Cash Dispensers . 11
3. References . 12
4. Note Classification . 13
5. Info Commands . 14
5.1 WFS_INF_CDM_STATUS . 14
5.2 WFS_INF_CDM_CAPABILITIES . 19
5.3 WFS_INF_CDM_CASH_UNIT_INFO . 24
5.4 WFS_INF_CDM_TELLER_INFO . 31
5.5 WFS_INF_CDM_CURRENCY_EXP . 33
5.6 WFS_INF_CDM_MIX_TYPES . 34
5.7 WFS_INF_CDM_MIX_TABLE . 35
5.8 WFS_INF_CDM_PRESENT_STATUS. 36
5.9 WFS_INF_CDM_GET_ITEM_INFO . 38
5.10 WFS_INF_CDM_GET_BLACKLIST . 40
5.11 WFS_INF_CDM_GET_ALL_ITEMS_INFO . 41
5.12 WFS_INF_CDM_GET_CLASSIFICATION_LIST . 44
6. Execute Commands . 46
6.1 WFS_CMD_CDM_DENOMINATE . 46
6.2 WFS_CMD_CDM_DISPENSE . 49
6.3 WFS_CMD_CDM_COUNT . 53
6.4 WFS_CMD_CDM_PRESENT . 56
6.5 WFS_CMD_CDM_REJECT . 58
6.6 WFS_CMD_CDM_RETRACT . 59
6.7 WFS_CMD_CDM_OPEN_SHUTTER . 62
6.8 WFS_CMD_CDM_CLOSE_SHUTTER . 63
6.9 WFS_CMD_CDM_SET_TELLER_INFO . 64
6.10 WFS_CMD_CDM_SET_CASH_UNIT_INFO . 65
6.11 WFS_CMD_CDM_START_EXCHANGE . 67
6.12 WFS_CMD_CDM_END_EXCHANGE. 69
6.13 WFS_CMD_CDM_OPEN_SAFE_DOOR . 71
6.14 WFS_CMD_CDM_CALIBRATE_CASH_UNIT . 72
6.15 WFS_CMD_CDM_SET_MIX_TABLE . 74
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6.16 WFS_CMD_CDM_RESET . 75
6.17 WFS_CMD_CDM_TEST_CASH_UNITS . 77
6.18 WFS_CMD_CDM_SET_GUIDANCE_LIGHT . 79
6.19 WFS_CMD_CDM_POWER_SAVE_CONTROL . 81
6.20 WFS_CMD_CDM_PREPARE_DISPENSE . 82
6.21 WFS_CMD_CDM_SET_BLACKLIST . 83
6.22 WFS_CMD_CDM_SYNCHRONIZE_COMMAND . 84
6.23 WFS_CMD_CDM_SET_CLASSIFICATION_LIST . 85
7. Events . 86
7.1 WFS_SRVE_CDM_SAFEDOOROPEN . 86
7.2 WFS_SRVE_CDM_SAFEDOORCLOSED. 87
7.3 WFS_USRE_CDM_CASHUNITTHRESHOLD . 88
7.4 WFS_SRVE_CDM_CASHUNITINFOCHANGED . 89
7.5 WFS_SRVE_CDM_TELLERINFOCHANGED . 90
7.6 WFS_EXEE_CDM_DELAYEDDISPENSE . 91
7.7 WFS_EXEE_CDM_STARTDISPENSE . 92
7.8 WFS_EXEE_CDM_CASHUNITERROR . 93
7.9 WFS_SRVE_CDM_ITEMSTAKEN . 94
7.10 WFS_SRVE_CDM_COUNTS_CHANGED. 95
7.11 WFS_EXEE_CDM_PARTIALDISPENSE . 96
7.12 WFS_EXEE_CDM_SUBDISPENSEOK . 97
7.13 WFS_EXEE_CDM_INCOMPLETEDISPENSE . 98
7.14 WFS_EXEE_CDM_NOTEERROR . 99
7.15 WFS_SRVE_CDM_ITEMSPRESENTED . 100
7.16 WFS_SRVE_CDM_MEDIADETECTED . 101
7.17 WFS_EXEE_CDM_INPUT_P6 . 102
7.18 WFS_SRVE_CDM_DEVICEPOSITION . 103
7.19 WFS_SRVE_CDM_POWER_SAVE_CHANGE . 104
7.20 WFS_EXEE_CDM_INFO_AVAILABLE . 105
7.21 WFS_EXEE_CDM_INCOMPLETERETRACT . 106
7.22 WFS_SRVE_CDM_SHUTTERSTATUSCHANGED . 107
7.23 WFS_SRVE_CDM_ITEMSINSERTED . 108
8. Sub-Dispensing Command Flow . 109
9. Rules for Cash Unit Exchange . 112
10. Events Associated with Cash Unit Status Changes . 113
10.1 One Physical Cash Unit Goes LOW . 113
10.2 Last Physical Cash Unit Goes LOW . 114
10.3 One Physical Cash Unit Goes INOP . 115
10.4 Last Physical Cash Unit Goes EMPTY . 116
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11. Multiple Dispense Command Flow . 117
12. Appendix E – Cash Dispenser E2E Authentication . 119
12.1 Secure Dispense Data Parameter Example Data . 119
12.2 Secure Dispense Command Flow: - Dispense and Present . 121
12.3 Secure Dispense Command Flow – Dispense Only with no Present . 123
12.4 Secure Dispense Command Flow: - Dispense Completes With Error Followed by an
Additional Dispense and Present . 124
12.5 Secure Dispense Command Flow: - User does not remove bills. Dispense, Present and
Retract . 126
12.6 Secure Dispense Command Flow: - Authentication Process Timeout . 128
13. C - Header file . 129
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European Foreword
This CEN Workshop Agreement has been developed in accordance with the CEN-CENELEC Guide 29
“CEN/CENELEC Workshop Agreements – The way to rapid consensus” and with the relevant provisions of
CEN/CENELEC Internal Regulations – Part 2. It was approved by a Workshop of representatives of interested
parties on 2022-11-08, the constitution of which was supported by CEN following several public calls for
participation, the first of which was made on 1998-06-24. However, this CEN Workshop Agreement does not
necessarily include all relevant stakeholders.
The final text of this CEN Workshop Agreement was provided to CEN for publication on 2022-11-18.
The following organizations and individuals developed and approved this CEN Workshop Agreement:
• AURIGA SPA
• CIMA SPA
• DIEBOLD NIXDORF SYSTEMS GMBH
• FIS BANKING SOLUTIONS UK LTD (OTS)
• FUJITSU TECHNOLOGY SOLUTIONS
• GLORY LTD
• GRG BANKING EQUIPMENT HK CO LTD
• HITACHI CHANNEL SOLUTIONS CORP
• HYOSUNG TNS INC
• JIANGSU GUOGUANG ELECTRONIC INFORMATION TECHNOLOGY
• KAL
• KEBA HANDOVER AUTOMATION GMBH
• NCR FSG
• NEXUS SOFTWARE
• OBERTHUR CASH PROTECTION
• OKI ELECTRIC INDUSTRY SHENZHEN
• SALZBURGER BANKEN SOFTWARE
• SECURE INNOVATION
• SIGMA SPA
It is possible that some elements of this CEN/CWA may be subject to patent rights. The CEN-CENELEC policy on
patent rights is set out in CEN-CENELEC Guide 8 “Guidelines for Implementation of the Common IPR Policy on
Patents (and other statutory intellectual property rights based on inventions)”. CEN shall not be held responsible for
identifying any or all such patent rights.
The Workshop participants have made every effort to ensure the reliability and accuracy of the technical and non-
technical content of CWA 16926-5, but this does not guarantee, either explicitly or implicitly, its correctness. Users
of CWA 16926-5 should be aware that neither the Workshop participants, nor CEN can be held liable for damages
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or losses of any kind whatsoever which may arise from its application. Users of CWA 16926-5 do so on their own
responsibility and at their own risk.
The CWA is published as a multi-part document, consisting of:
Part 1: Application Programming Interface (API) - Service Provider Interface (SPI) - Programmer's Reference
Part 2: Service Classes Definition - Programmer's Reference
Part 3: Printer and Scanning Device Class Interface - Programmer's Reference
Part 4: Identification Card Device Class Interface - Programmer's Reference
Part 5: Cash Dispenser Device Class Interface - Programmer's Reference
Part 6: PIN Keypad Device Class Interface - Programmer's Reference
Part 7: Check Reader/Scanner Device Class Interface - Programmer's Reference
Part 8: Depository Device Class Interface - Programmer's Reference
Part 9: Text Terminal Unit Device Class Interface - Programmer's Reference
Part 10: Sensors and Indicators Unit Device Class Interface - Programmer's Reference
Part 11: Vendor Dependent Mode Device Class Interface - Programmer's Reference
Part 12: Camera Device Class Interface - Programmer's Reference
Part 13: Alarm Device Class Interface - Programmer's Reference
Part 14: Card Embossing Unit Device Class Interface - Programmer's Reference
Part 15: Cash-In Module Device Class Interface - Programmer's Reference
Part 16: Card Dispenser Device Class Interface - Programmer's Reference
Part 17: Barcode Reader Device Class Interface - Programmer's Reference
Part 18: Item Processing Module Device Class Interface - Programmer's Reference
Part 19: Biometrics Device Class Interface - Programmer's Reference
Parts 20 - 28: Reserved for future use.
Parts 29 through 47 constitute an optional addendum to this CWA. They define the integration between the SNMP
standard and the set of status and statistical information exported by the Service Providers.
Part 29: XFS MIB Architecture and SNMP Extensions - Programmer’s Reference
Part 30: XFS MIB Device Specific Definitions - Printer Device Class
Part 31: XFS MIB Device Specific Definitions - Identification Card Device Class
Part 32: XFS MIB Device Specific Definitions - Cash Dispenser Device Class
Part 33: XFS MIB Device Specific Definitions - PIN Keypad Device Class
Part 34: XFS MIB Device Specific Definitions - Check Reader/Scanner Device Class
Part 35: XFS MIB Device Specific Definitions - Depository Device Class
Part 36: XFS MIB Device Specific Definitions - Text Terminal Unit Device Class
Part 37: XFS MIB Device Specific Definitions - Sensors and Indicators Unit Device Class
Part 38: XFS MIB Device Specific Definitions - Camera Device Class
Part 39: XFS MIB Device Specific Definitions - Alarm Device Class
Part 40: XFS MIB Device Specific Definitions - Card Embossing Unit Class
Part 41: XFS MIB Device Specific Definitions - Cash-In Module Device Class
Part 42: Reserved for future use.
Part 43: XFS MIB Device Specific Definitions - Vendor Dependent Mode Device Class
Part 44: XFS MIB Application Management
Part 45: XFS MIB Device Specific Definitions - Card Dispenser Device Class
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Part 46: XFS MIB Device Specific Definitions - Barcode Reader Device Class
Part 47: XFS MIB Device Specific Definitions - Item Processing Module Device Class
Part 48: XFS MIB Device Specific Definitions - Biometrics Device Class
Parts 49 - 60 are reserved for future use.
Part 61: Application Programming Interface (API) - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Service Provider Interface (SPI) - Programmer's Reference
Part 62: Printer and Scanning Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 63: Identification Card Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 64: Cash Dispenser Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 65: PIN Keypad Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 66: Check Reader/Scanner Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 67: Depository Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 68: Text Terminal Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 69: Sensors and Indicators Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 70: Vendor Dependent Mode Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 71: Camera Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 72: Alarm Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 73: Card Embossing Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 74: Cash-In Module Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 75: Card Dispenser Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 76: Barcode Reader Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 77: Item Processing Module Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 78: Biometric Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
In addition to these Programmer's Reference specifications, the reader of this CWA is also referred to a
complementary document, called Release Notes. The Release Notes contain clarifications and explanations on the
CWA specifications, which are not requiring functional changes. The current version of the Release Notes is
available online from: https://www.cencenelec.eu/areas-of-work/cen-sectors/digital-society-cen/cwa-download-
area/.
The information in this document represents the Workshop's current views on the issues discussed as of the date of
publication. It is provided for informational purposes only and is subject to change without notice. CEN makes no
warranty, express or implied, with respect to this document.
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Revision History:
3.00 October 18, 2000 Initial Release.
3.10 November 29, 2007 For a description of changes from version 3.00 to version
3.10 see the CDM 3.10 Migration document.
3.20 March 2, 2011 For a description of changes from version 3.10 to version
3.20 see the CDM 3.20 Migration document.
3.30 March 19, 2015 For a description of changes from version 3.20 to version
3.30 see the CDM 3.30 Migration document.
3.40 December 06, 2019 For a description of changes from version 3.30 to version
3.40 see the CDM 3.40 Migration document.
3.50 November 18, 2022 For a description of changes from version 3.40 to version
3.50 see the CDM 3.50 Migration document.
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1. Introduction
1.1 Background to Release 3.50
The CEN/XFS Workshop aims to promote a clear and unambiguous specification defining a multi-vendor software
interface to financial peripheral devices. The XFS (eXtensions for Financial Services) specifications are developed
within the CEN (European Committee for Standardization/Information Society Standardization System) Workshop
environment. CEN Workshops aim to arrive at a European consensus on an issue that can be published as a CEN
Workshop Agreement (CWA).
The CEN/XFS Workshop encourages the participation of both banks and vendors in the deliberations required to
create an industry standard. The CEN/XFS Workshop achieves its goals by focused sub-groups working
electronically and meeting quarterly.
Release 3.50 of the XFS specification is based on a C API and is delivered with the continued promise for the
protection of technical investment for existing applications. This release of the specification extends the
functionality and capabilities of the existing devices covered by the specification:
• Addition of E2E security
• PIN Password Entry
1.2 XFS Service-Specific Programming
The service classes are defined by their service-specific commands and the associated data structures, error codes,
messages, etc. These commands are used to request functions that are specific to one or more classes of Service
Providers, but not all of them, and therefore are not included in the common API for basic or administration
functions.
When a service-specific command is common among two or more classes of Service Providers, the syntax of the
command is as similar as possible across all services, since a major objective of XFS is to standardize function
codes and structures for the broadest variety of services. For example, using the WFSExecute function, the
commands to read data from various services are as similar as possible to each other in their syntax and data
structures.
In general, the specific command set for a service class is defined as a superset of the specific capabilities likely to
be provided by the developers of the services of that class; thus any particular device will normally support only a
subset of the defined command set.
There are three cases in which a Service Provider may receive a service-specific command that it does not support:
The requested capability is defined for the class of Service Providers by the XFS specification, the particular vendor
implementation of that service does not support it, and the unsupported capability is not considered to be
fundamental to the service. In this case, the Service Provider returns a successful completion, but does no operation.
An example would be a request from an application to turn on a control indicator on a passbook printer; the Service
Provider recognizes the command, but since the passbook printer it is managing does not include that indicator, the
Service Provider does no operation and returns a successful completion to the application.
The requested capability is defined for the class of Service Providers by the XFS specification, the particular vendor
implementation of that service does not support it, and the unsupported capability is considered to be fundamental
to the service. In this case, a WFS_ERR_UNSUPP_COMMAND error for Execute commands or
WFS_ERR_UNSUPP_CATEGORY error for Info commands is returned to the calling application. An example
would be a request from an application to a cash dispenser to retract items where the dispenser hardware does not
have that capability; the Service Provider recognizes the command but, since the cash dispenser it is managing is
unable to fulfil the request, returns this error.
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The requested capability is not defined for the class of Service Providers by the XFS specification. In this case, a
WFS_ERR_INVALID_COMMAND for Execute commands or WFS_ERR_INVALID_CATEGORY error for Info
commands error is returned to the calling application.
This design allows implementation of applications that can be used with a range of services that provide differing
subsets of the functionalities that are defined for their service class. Applications may use the WFSGetInfo and
WFSAsyncGetInfo commands to inquire about the capabilities of the service they are about to use, and modify
their behavior accordingly, or they may use functions and then deal with error returns to make decisions as to how
to use the service.
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2. Cash Dispensers
This specification describes the functionality of an XFS compliant Cash Dispenser Module (CDM) Service
Provider. It defines the service-specific commands that can be issued to the Service Provider using the
WFSGetInfo, WFSAsyncGetInfo, WFSExecute and WFSAsyncExecute functions.
Persistent values are maintained through power failures, open sessions, close session and system resets.
This specification covers the dispensing of items. An “item” is defined as any media that can be dispensed and
includes coupons, documents, bills and coins. However, if coins and bills are both to be dispensed separate Service
Providers must be implemented for each.
All currency parameters in this specification are expressed as a quantity of minimum dispense units, as defined in
the description of the WFS_INF_CDM_CURRENCY_EXP command.
There are two types of CDM: Self-Service CDM and Teller CDM. A Self-Service CDM operates in an automated
environment, while a Teller CDM has an operator present. The functionality provided by the following commands
is only applicable to a Teller CDM:
WFS_CMD_CDM_SET_TELLER_INFO
WFS_INF_CDM_TELLER_INFO
It is possible for the CDM to be part of a compound device with the Cash-In Module (CIM). This CIM\CDM
combination is referred to throughout this specification as a “Cash Recycler”. For details of the CIM interface see
[Ref. 3].
If the device is a Cash Recycler then, if cash unit exchanges are required on both interfaces, the exchanges cannot
be performed concurrently. An exchange on one interface must be complete (the
WFS_CMD_CDM_END_EXCHANGE must have completed) before an exchange can start on the other interface.
...
SLOVENSKI STANDARD
SIST-TP CWA 16926-5:2023
01-marec-2023
Specifikacija vmesnika razširitev za finančne storitve (XFS), izdaja 3.50 - 5. del:
Vmesnik razreda modula blagajniškega avtomata - Referenca za programerje
Extensions for Financial Services (XFS) interface specification Release 3.50 - Part 5:
Cash Dispenser Module Class Interface - Programmer's Reference
Ta slovenski standard je istoveten z: CWA 16926-5:2022
ICS:
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
35.240.15 Identifikacijske kartice. Čipne Identification cards. Chip
kartice. Biometrija cards. Biometrics
35.240.40 Uporabniške rešitve IT v IT applications in banking
bančništvu
SIST-TP CWA 16926-5:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TP CWA 16926-5:2023
CEN
CWA 16926-5
WORKSHOP
December 2022
AGREEMENT
ICS 35.200; 35.240.15; 35.240.40
English version
Extensions for Financial Services (XFS) interface
specification Release 3.50 - Part 5: Cash Dispenser Module
Class Interface - Programmer's Reference
This CEN Workshop Agreement has been drafted and approved by a Workshop of representatives of interested parties, the
constitution of which is indicated in the foreword of this Workshop Agreement.
The formal process followed by the Workshop in the development of this Workshop Agreement has been endorsed by the
National Members of CEN but neither the National Members of CEN nor the CEN-CENELEC Management Centre can be held
accountable for the technical content of this CEN Workshop Agreement or possible conflicts with standards or legislation.
This CEN Workshop Agreement can in no way be held as being an official standard developed by CEN and its Members.
This CEN Workshop Agreement is publicly available as a reference document from the CEN Members National Standard Bodies.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
Ref. No.:CWA 16926-5:2022 E
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Table of Contents
European Foreword . 5
1. Introduction . 9
1.1 Background to Release 3.50 . 9
1.2 XFS Service-Specific Programming . 9
2. Cash Dispensers . 11
3. References . 12
4. Note Classification . 13
5. Info Commands . 14
5.1 WFS_INF_CDM_STATUS . 14
5.2 WFS_INF_CDM_CAPABILITIES . 19
5.3 WFS_INF_CDM_CASH_UNIT_INFO . 24
5.4 WFS_INF_CDM_TELLER_INFO . 31
5.5 WFS_INF_CDM_CURRENCY_EXP . 33
5.6 WFS_INF_CDM_MIX_TYPES . 34
5.7 WFS_INF_CDM_MIX_TABLE . 35
5.8 WFS_INF_CDM_PRESENT_STATUS. 36
5.9 WFS_INF_CDM_GET_ITEM_INFO . 38
5.10 WFS_INF_CDM_GET_BLACKLIST . 40
5.11 WFS_INF_CDM_GET_ALL_ITEMS_INFO . 41
5.12 WFS_INF_CDM_GET_CLASSIFICATION_LIST . 44
6. Execute Commands . 46
6.1 WFS_CMD_CDM_DENOMINATE . 46
6.2 WFS_CMD_CDM_DISPENSE . 49
6.3 WFS_CMD_CDM_COUNT . 53
6.4 WFS_CMD_CDM_PRESENT . 56
6.5 WFS_CMD_CDM_REJECT . 58
6.6 WFS_CMD_CDM_RETRACT . 59
6.7 WFS_CMD_CDM_OPEN_SHUTTER . 62
6.8 WFS_CMD_CDM_CLOSE_SHUTTER . 63
6.9 WFS_CMD_CDM_SET_TELLER_INFO . 64
6.10 WFS_CMD_CDM_SET_CASH_UNIT_INFO . 65
6.11 WFS_CMD_CDM_START_EXCHANGE . 67
6.12 WFS_CMD_CDM_END_EXCHANGE. 69
6.13 WFS_CMD_CDM_OPEN_SAFE_DOOR . 71
6.14 WFS_CMD_CDM_CALIBRATE_CASH_UNIT . 72
6.15 WFS_CMD_CDM_SET_MIX_TABLE . 74
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6.16 WFS_CMD_CDM_RESET . 75
6.17 WFS_CMD_CDM_TEST_CASH_UNITS . 77
6.18 WFS_CMD_CDM_SET_GUIDANCE_LIGHT . 79
6.19 WFS_CMD_CDM_POWER_SAVE_CONTROL . 81
6.20 WFS_CMD_CDM_PREPARE_DISPENSE . 82
6.21 WFS_CMD_CDM_SET_BLACKLIST . 83
6.22 WFS_CMD_CDM_SYNCHRONIZE_COMMAND . 84
6.23 WFS_CMD_CDM_SET_CLASSIFICATION_LIST . 85
7. Events . 86
7.1 WFS_SRVE_CDM_SAFEDOOROPEN . 86
7.2 WFS_SRVE_CDM_SAFEDOORCLOSED. 87
7.3 WFS_USRE_CDM_CASHUNITTHRESHOLD . 88
7.4 WFS_SRVE_CDM_CASHUNITINFOCHANGED . 89
7.5 WFS_SRVE_CDM_TELLERINFOCHANGED . 90
7.6 WFS_EXEE_CDM_DELAYEDDISPENSE . 91
7.7 WFS_EXEE_CDM_STARTDISPENSE . 92
7.8 WFS_EXEE_CDM_CASHUNITERROR . 93
7.9 WFS_SRVE_CDM_ITEMSTAKEN . 94
7.10 WFS_SRVE_CDM_COUNTS_CHANGED. 95
7.11 WFS_EXEE_CDM_PARTIALDISPENSE . 96
7.12 WFS_EXEE_CDM_SUBDISPENSEOK . 97
7.13 WFS_EXEE_CDM_INCOMPLETEDISPENSE . 98
7.14 WFS_EXEE_CDM_NOTEERROR . 99
7.15 WFS_SRVE_CDM_ITEMSPRESENTED . 100
7.16 WFS_SRVE_CDM_MEDIADETECTED . 101
7.17 WFS_EXEE_CDM_INPUT_P6 . 102
7.18 WFS_SRVE_CDM_DEVICEPOSITION . 103
7.19 WFS_SRVE_CDM_POWER_SAVE_CHANGE . 104
7.20 WFS_EXEE_CDM_INFO_AVAILABLE . 105
7.21 WFS_EXEE_CDM_INCOMPLETERETRACT . 106
7.22 WFS_SRVE_CDM_SHUTTERSTATUSCHANGED . 107
7.23 WFS_SRVE_CDM_ITEMSINSERTED . 108
8. Sub-Dispensing Command Flow . 109
9. Rules for Cash Unit Exchange . 112
10. Events Associated with Cash Unit Status Changes . 113
10.1 One Physical Cash Unit Goes LOW . 113
10.2 Last Physical Cash Unit Goes LOW . 114
10.3 One Physical Cash Unit Goes INOP . 115
10.4 Last Physical Cash Unit Goes EMPTY . 116
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11. Multiple Dispense Command Flow . 117
12. Appendix E – Cash Dispenser E2E Authentication . 119
12.1 Secure Dispense Data Parameter Example Data . 119
12.2 Secure Dispense Command Flow: - Dispense and Present . 121
12.3 Secure Dispense Command Flow – Dispense Only with no Present . 123
12.4 Secure Dispense Command Flow: - Dispense Completes With Error Followed by an
Additional Dispense and Present . 124
12.5 Secure Dispense Command Flow: - User does not remove bills. Dispense, Present and
Retract . 126
12.6 Secure Dispense Command Flow: - Authentication Process Timeout . 128
13. C - Header file . 129
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European Foreword
This CEN Workshop Agreement has been developed in accordance with the CEN-CENELEC Guide 29
“CEN/CENELEC Workshop Agreements – The way to rapid consensus” and with the relevant provisions of
CEN/CENELEC Internal Regulations – Part 2. It was approved by a Workshop of representatives of interested
parties on 2022-11-08, the constitution of which was supported by CEN following several public calls for
participation, the first of which was made on 1998-06-24. However, this CEN Workshop Agreement does not
necessarily include all relevant stakeholders.
The final text of this CEN Workshop Agreement was provided to CEN for publication on 2022-11-18.
The following organizations and individuals developed and approved this CEN Workshop Agreement:
• AURIGA SPA
• CIMA SPA
• DIEBOLD NIXDORF SYSTEMS GMBH
• FIS BANKING SOLUTIONS UK LTD (OTS)
• FUJITSU TECHNOLOGY SOLUTIONS
• GLORY LTD
• GRG BANKING EQUIPMENT HK CO LTD
• HITACHI CHANNEL SOLUTIONS CORP
• HYOSUNG TNS INC
• JIANGSU GUOGUANG ELECTRONIC INFORMATION TECHNOLOGY
• KAL
• KEBA HANDOVER AUTOMATION GMBH
• NCR FSG
• NEXUS SOFTWARE
• OBERTHUR CASH PROTECTION
• OKI ELECTRIC INDUSTRY SHENZHEN
• SALZBURGER BANKEN SOFTWARE
• SECURE INNOVATION
• SIGMA SPA
It is possible that some elements of this CEN/CWA may be subject to patent rights. The CEN-CENELEC policy on
patent rights is set out in CEN-CENELEC Guide 8 “Guidelines for Implementation of the Common IPR Policy on
Patents (and other statutory intellectual property rights based on inventions)”. CEN shall not be held responsible for
identifying any or all such patent rights.
The Workshop participants have made every effort to ensure the reliability and accuracy of the technical and non-
technical content of CWA 16926-5, but this does not guarantee, either explicitly or implicitly, its correctness. Users
of CWA 16926-5 should be aware that neither the Workshop participants, nor CEN can be held liable for damages
5
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or losses of any kind whatsoever which may arise from its application. Users of CWA 16926-5 do so on their own
responsibility and at their own risk.
The CWA is published as a multi-part document, consisting of:
Part 1: Application Programming Interface (API) - Service Provider Interface (SPI) - Programmer's Reference
Part 2: Service Classes Definition - Programmer's Reference
Part 3: Printer and Scanning Device Class Interface - Programmer's Reference
Part 4: Identification Card Device Class Interface - Programmer's Reference
Part 5: Cash Dispenser Device Class Interface - Programmer's Reference
Part 6: PIN Keypad Device Class Interface - Programmer's Reference
Part 7: Check Reader/Scanner Device Class Interface - Programmer's Reference
Part 8: Depository Device Class Interface - Programmer's Reference
Part 9: Text Terminal Unit Device Class Interface - Programmer's Reference
Part 10: Sensors and Indicators Unit Device Class Interface - Programmer's Reference
Part 11: Vendor Dependent Mode Device Class Interface - Programmer's Reference
Part 12: Camera Device Class Interface - Programmer's Reference
Part 13: Alarm Device Class Interface - Programmer's Reference
Part 14: Card Embossing Unit Device Class Interface - Programmer's Reference
Part 15: Cash-In Module Device Class Interface - Programmer's Reference
Part 16: Card Dispenser Device Class Interface - Programmer's Reference
Part 17: Barcode Reader Device Class Interface - Programmer's Reference
Part 18: Item Processing Module Device Class Interface - Programmer's Reference
Part 19: Biometrics Device Class Interface - Programmer's Reference
Parts 20 - 28: Reserved for future use.
Parts 29 through 47 constitute an optional addendum to this CWA. They define the integration between the SNMP
standard and the set of status and statistical information exported by the Service Providers.
Part 29: XFS MIB Architecture and SNMP Extensions - Programmer’s Reference
Part 30: XFS MIB Device Specific Definitions - Printer Device Class
Part 31: XFS MIB Device Specific Definitions - Identification Card Device Class
Part 32: XFS MIB Device Specific Definitions - Cash Dispenser Device Class
Part 33: XFS MIB Device Specific Definitions - PIN Keypad Device Class
Part 34: XFS MIB Device Specific Definitions - Check Reader/Scanner Device Class
Part 35: XFS MIB Device Specific Definitions - Depository Device Class
Part 36: XFS MIB Device Specific Definitions - Text Terminal Unit Device Class
Part 37: XFS MIB Device Specific Definitions - Sensors and Indicators Unit Device Class
Part 38: XFS MIB Device Specific Definitions - Camera Device Class
Part 39: XFS MIB Device Specific Definitions - Alarm Device Class
Part 40: XFS MIB Device Specific Definitions - Card Embossing Unit Class
Part 41: XFS MIB Device Specific Definitions - Cash-In Module Device Class
Part 42: Reserved for future use.
Part 43: XFS MIB Device Specific Definitions - Vendor Dependent Mode Device Class
Part 44: XFS MIB Application Management
Part 45: XFS MIB Device Specific Definitions - Card Dispenser Device Class
6
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Part 46: XFS MIB Device Specific Definitions - Barcode Reader Device Class
Part 47: XFS MIB Device Specific Definitions - Item Processing Module Device Class
Part 48: XFS MIB Device Specific Definitions - Biometrics Device Class
Parts 49 - 60 are reserved for future use.
Part 61: Application Programming Interface (API) - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Service Provider Interface (SPI) - Programmer's Reference
Part 62: Printer and Scanning Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 63: Identification Card Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 64: Cash Dispenser Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 65: PIN Keypad Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 66: Check Reader/Scanner Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 67: Depository Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 68: Text Terminal Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 69: Sensors and Indicators Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 70: Vendor Dependent Mode Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 71: Camera Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 72: Alarm Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 73: Card Embossing Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 74: Cash-In Module Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 75: Card Dispenser Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 76: Barcode Reader Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 77: Item Processing Module Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 78: Biometric Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
In addition to these Programmer's Reference specifications, the reader of this CWA is also referred to a
complementary document, called Release Notes. The Release Notes contain clarifications and explanations on the
CWA specifications, which are not requiring functional changes. The current version of the Release Notes is
available online from: https://www.cencenelec.eu/areas-of-work/cen-sectors/digital-society-cen/cwa-download-
area/.
The information in this document represents the Workshop's current views on the issues discussed as of the date of
publication. It is provided for informational purposes only and is subject to change without notice. CEN makes no
warranty, express or implied, with respect to this document.
7
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Revision History:
3.00 October 18, 2000 Initial Release.
3.10 November 29, 2007 For a description of changes from version 3.00 to version
3.10 see the CDM 3.10 Migration document.
3.20 March 2, 2011 For a description of changes from version 3.10 to version
3.20 see the CDM 3.20 Migration document.
3.30 March 19, 2015 For a description of changes from version 3.20 to version
3.30 see the CDM 3.30 Migration document.
3.40 December 06, 2019 For a description of changes from version 3.30 to version
3.40 see the CDM 3.40 Migration document.
3.50 November 18, 2022 For a description of changes from version 3.40 to version
3.50 see the CDM 3.50 Migration document.
8
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1. Introduction
1.1 Background to Release 3.50
The CEN/XFS Workshop aims to promote a clear and unambiguous specification defining a multi-vendor software
interface to financial peripheral devices. The XFS (eXtensions for Financial Services) specifications are developed
within the CEN (European Committee for Standardization/Information Society Standardization System) Workshop
environment. CEN Workshops aim to arrive at a European consensus on an issue that can be published as a CEN
Workshop Agreement (CWA).
The CEN/XFS Workshop encourages the participation of both banks and vendors in the deliberations required to
create an industry standard. The CEN/XFS Workshop achieves its goals by focused sub-groups working
electronically and meeting quarterly.
Release 3.50 of the XFS specification is based on a C API and is delivered with the continued promise for the
protection of technical investment for existing applications. This release of the specification extends the
functionality and capabilities of the existing devices covered by the specification:
• Addition of E2E security
• PIN Password Entry
1.2 XFS Service-Specific Programming
The service classes are defined by their service-specific commands and the associated data structures, error codes,
messages, etc. These commands are used to request functions that are specific to one or more classes of Service
Providers, but not all of them, and therefore are not included in the common API for basic or administration
functions.
When a service-specific command is common among two or more classes of Service Providers, the syntax of the
command is as similar as possible across all services, since a major objective of XFS is to standardize function
codes and structures for the broadest variety of services. For example, using the WFSExecute function, the
commands to read data from various services are as similar as possible to each other in their syntax and data
structures.
In general, the specific command set for a service class is defined as a superset of the specific capabilities likely to
be provided by the developers of the services of that class; thus any particular device will normally support only a
subset of the defined command set.
There are three cases in which a Service Provider may receive a service-specific command that it does not support:
The requested capability is defined for the class of Service Providers by the XFS specification, the particular vendor
implementation of that service does not support it, and the unsupported capability is not considered to be
fundamental to the service. In this case, the Service Provider returns a successful completion, but does no operation.
An example would be a request from an application to turn on a control indicator on a passbook printer; the Service
Provider recognizes the command, but since the passbook printer it is managing does not include that indicator, the
Service Provider does no operation and returns a successful completion to the application.
The requested capability is defined for the class of Service Providers by the XFS specification, the particular vendor
implementation of that service does not support it, and the unsupported capability is considered to be fundamental
to the service. In this case, a WFS_ERR_UNSUPP_COMMAND error for Execute commands or
WFS_ERR_UNSUPP_CATEGORY error for Info commands is returned to the calling application. An example
would be a request from an application to a cash dispenser to retract items where the dispenser hardware does not
have that capability; the Service Provider recognizes the command but, since the cash dispenser it is managing is
unable to fulfil the request, returns this error.
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The requested capability is not defined for the class of Service Providers by the XFS specification. In this case, a
WFS_ERR_INVALID_COMMAND for Execute commands or WFS_ERR_INVALID_CATEGORY error for Info
commands error is returned to the calling application.
This design allows implementation of applications that can be used with a range of services that provide differing
subsets of the functionalities that are defined for their service class. Applications may use the WFSGetInfo and
WFSAsyncGetInfo commands to inquire about the capabilities of the service they are about to use, and modify
their behavior accordingly, or they may use functions and then deal with error returns to make decisions as to how
to use the service.
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2. Cash Dispensers
This specification describes the functionality of an XFS compliant Cash Dispenser Module (CDM) Service
Provider. It defines the service-specific commands that can be issued to the Service Provider using the
WFSGetInfo, WFSAsyncGetInfo, WFSExecute and WFSAsyncExecute functions.
Persistent values are maintained through power failures, open sessions, close session and system resets.
This specification covers the dispensing of items. An “item” is defined as any media that can be dispensed and
includes coupons, documents, bills and coins. However, if coins and bills are both to be dispensed separate Service
Providers must be implemented for each.
All currency parameters in this specification are expressed as a quantity of minimum dispense units, as defined in
the description of the WFS_INF_CDM_CURRENCY_EXP command.
There are two types of CDM: Self-Service CDM and Teller CDM. A Self-Service CDM operates in an automated
environment, while a Teller CDM has an operator present. The functionality provided by the following commands
is only applicable to a Teller CDM:
WFS_CMD_CDM_SET_TELLER_INFO
WFS_INF_CDM_TELLER_INFO
It is possible for the CDM to be part of a compound device with the Cash-In Module (CIM). This CIM\CDM
combination is referred to throughout this specification as a “Cash Recycler”. For details of the CIM interface see
[Ref. 3].
If the device is a Cash Recycler then, if cash unit exchanges are required on both interfaces, the exchanges cannot
be performed concurrently. An exchange on one interface must be complete (the
WFS_CMD_CDM_END_EXCHANGE must have completed) before an e
...
Questions, Comments and Discussion
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