ECMA 218-1994 Protocol for Computer Supported Telecommunications Applications (CSTA) Phase II《计算机支持的电信应用(CSTA)第II阶段用协议 勘误表 1996年12月11日》.pdf
《ECMA 218-1994 Protocol for Computer Supported Telecommunications Applications (CSTA) Phase II《计算机支持的电信应用(CSTA)第II阶段用协议 勘误表 1996年12月11日》.pdf》由会员分享,可在线阅读,更多相关《ECMA 218-1994 Protocol for Computer Supported Telecommunications Applications (CSTA) Phase II《计算机支持的电信应用(CSTA)第II阶段用协议 勘误表 1996年12月11日》.pdf(228页珍藏版)》请在麦多课文档分享上搜索。
1、Standard ECMA-218December 1994Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chProtocol for ComputerSupported TelecommunicationsApplications (CSTA) Phase II.Standard ECMA-218December 1994Standardizi
2、ng Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chECMA-218.DOC - 12.01.99 08:47Protocol for ComputerSupported TelecommunicationsApplications (CSTA) Phase II.Brief HistoryThis Standard defines Phase II of the Pr
3、otocol for Computer Supported Telecommunications Applications (CSTA) for OSILayer 7 communication between a computing network and a telecommunications network. This Standard and its companionStandard ECMA-217 Services for Computer Supported Telecommunications Applications (CSTA) Phase II reflectagre
4、ements of ECMA member companies on Phase II of the standards for CSTA. Additional phases are anticipated. ThisStandard is based on the practical experience of ECMA member companies and represents a pragmatic and widely-basedconsensus.This Standard takes direction from Technical Report ECMA TR/52 Com
5、puter Supported Telecommunications Applications.Phase II of CSTA extends the previous Phase I standard in major theme directions as well as numerous details. Major areas ofadvancement include: the addition of explicit application context negotiation mechanisms; the addition of I/O services; the addi
6、tion of Special Resource Functions and, particularly, Voice Unit services; new and/or enhanced services and event reports for commonly used call control and monitoring applications; new servicesinclude Single Step Transfer, Single Step Conference, Call Park and Send DTMF Signals.The Phase II CSTA st
7、andards are not fully backwards compatible with the Phase I standards. Although backwardscompatibility is an important consideration and has been maintained whenever possible, the addition of new parameters incertain services and events, as well as the deletion of unused Phase I services and the add
8、ition of entirely new Phase II servicesand events, did not allow complete backwards compatibility.This Standard is dedicated to the memory of Terry Wuerfel.This ECMA Standard has been adopted by the ECMA General Assembly of December 1994.Usage Note regarding removing Year 2000 (Y2K) risksin the CSTA
9、 Phase I and Phase II Protocol Standards1 January 1999In both ITU-T Recs. X.208 (ASN.1 1988) and X.680 (ASN.1 1994), the definition of UTCTime, which is used in the CSTAPhase I and Phase II Protocol Standards (ECMA-180 and ECMA-218 respectively), is not Y2K-safe. The Year field (the YYfield) is repr
10、esented by a two-digit string, with no accompanying text mandating a Y2K-safe interpretation.For the CSTA Phase I and Phase II Protocol Standards, the following interpretation of the Year field is mandated : If the YY component is in the range 00-49, the century is determined to be “20“ (i.e. the ye
11、ar is 2000 to 2049); If the YY component is in the range 50-99, the century is determined to be “19“ (i.e. the year is 1950 to 1999).The risk has been removed in the CSTA Phase III Protocol Standard (ECMA-285) by replacing the references to “UTCTime“with references to “GeneralizedTime“, which is Y2K
12、-safe.List of corrected errata for ECMA-21811 December 1996SummaryFollowing is a summary of the errors detected and corrected in Standard ECMA-218, Protocol for Computer SupportedTelecommunications Applications (CSTA) Phase II. These results were obtained by using the OSS and SNACC ASN.1compilers.Al
13、l definitions Compilers complained about “icd-ecma(0012)” statements, therefore “00” has been removed from the definitionsCorrected:CSTA-application-context-information iso( 1) identified-organization( 3) icd-ecma( 12)standard( 0) csta2( 218) application-context-information( 200) Original:CSTA-appli
14、cation-context-information iso( 1) identified-organization( 3) icd-ecma( 0012)standard( 0) csta2( 218) application-context-information( 200) Multiple definitions Many of the definitions referred to “ECMA-180” instead of “ECMA-218”Corrected:CSTA-route-end-request iso( 1) identified-organization( 3) i
15、cd-ecma( 12)standard( 0) csta2( 218) route-end-request( 85) CSTACommonArguments, CSTAPrivateData FROM CSTA-extension-types iso( 1) identified-organization( 3) icd-ecma( 12)standard( 0) csta2( 218) extension-types( 129) ;CSTA-change-monitor-filter iso( 1) identified-organization( 3) icd-ecma( 12)stan
16、dard( 0) csta2( 218) change-monitor-filter( 102) CSTAObject FROM CSTA-switching-function-objects iso( 1) identified-organization( 3) icd-ecma( 12)standard( 0) csta2( 218) switching-function-objects( 122) CSTA-switching-function-objects iso( 1) identified-organization( 3) icd-ecma( 12)standard( 0) cs
17、ta2( 218)switching-function-objects( 122) Original:CSTA-route-end-request iso( 1) identified-organization( 3) icd-ecma( 0012)standard( 0) csta( 180) route-end-request( 85) CSTACommonArguments, CSTAPrivateData FROM CSTA-extension-types iso( 1) identified-organization( 3) icd-ecma( 0012)standard( 0) c
18、sta( 180) version1(1) extension-types( 129) ;CSTA-change-monitor-filter iso( 1) identified-organization( 3) icd-ecma( 0012)standard( 0) csta( 180) version1 ( 1) change-monitor-filter( 102) CSTAObject FROM CSTA-switching-function-objects iso( 1) identified-organization( 3) icd-ecma( 0012)standard( 0)
19、 csta( 180) switching-function-objects( 122) CSTA-switching-function-objects iso( 1) identified-organization( 3) icd-ecma( 0012)standard( 0) csta( 180) switching-function-objects( 122) Multiple Sections “BITSTRING” should be “BIT STRING”Corrected:CSTAVersion := BIT STRINGSwitchingFunctionServices :=
20、 BIT STRINGEventReportServices := BIT STRINGComputingFunctionServices := BIT STRINGBidirectionalServices := BIT STRINGStatusReportingServices := BIT STRINGInputOutputServices := BIT STRINGVoiceUnitServices := BIT STRINGDeviceClass := BIT STRINGOriginal:CSTAVersion := BITSTRINGSwitchingFunctionServic
21、es := BITSTRINGEventReportServices := BITSTRINGComputingFunctionServices := BITSTRINGBidirectionalServices := BITSTRINGStatusReportingServices := BITSTRINGInputOutputServices := BITSTRINGVoiceUnitServices := BITSTRINGDeviceClass := BITSTRINGSection 8.2.1, Encoding of application context information
22、Comma missing after reRouteRequestCorrected:ComputingFunctionServices := BIT STRINGrouteRequest (0),reRouteRequest (1),routeSelectRequest (2),routeUsedRequest (3),routeEndRequest (4) Original:ComputingFunctionServices := BIT STRINGrouteRequest (0),reRouteRequest (1)routeSelectRequest (2),routeUsedRe
23、quest (3),routeEndRequest (4) Section 9.3, Associate data AssociateDataArgument/Correlator Data misspelled Extra brace at end of SEQUENCE statement for AssociateDataArgumentCorrected:correlatorData 2 IMPLICIT CorrelatorData OPTIONAL,extensions CSTACommonArguments OPTIONALOriginal:correlatorData 2 IM
24、PLICIT CorellatorData OPTIONAL,extensions CSTACommonArguments OPTIONAL Section 9.8, Consultation call Missing comma after AuthCodeCorrected:AccountInfo, AuthCode, CorrelatorData, DeviceProfile FROM CSTA-device-feature-typesOriginal:AccountInfo, AuthCode CorrelatorData, DeviceProfile FROM CSTA-device
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