ANSI ATIS 1000622-1999 Message Waiting Indicator Control and Notification Supplementary Services and Associated Switching and Signaling Specifications.pdf

1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000622.1999(R2013) Message Waiting Indicator Control and Notification Supplementary Services and Associated Switching and Signaling Specifications As a leading technology and solutions development organization, ATIS brings together the top glo

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15、t 42nd Street, New York, NY 10036Copyright 2000 by Alliance for Telecommunications Industry SolutionsAll rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of the publisher.Printed in the United St

16、ates of AmericaiContentsPageForeword ii1 Scope, purpose, and application 12 Normative references . 13 Definitions. 24 Description of the Message Waiting Indicator Control and Notification services from the users perspective 35 Functional capabilities and information flows needed for Message Waiting

17、Indicator Control and Notification 76 Switching and signaling specifications for Message Waiting Indicator Control and Notification services at the user/network interface 117 Switching and signaling specifications for Message Waiting Indicator Control and Notification at interswitch interfaces. 398

18、Specifications for protocol interworking 50Tables1 Subscription options for client user (per ISDN number) . 42 Allocation of function scenarios 113 Mapping from MWI type received in MWI control request to client user MWI state 214 Mapping from MWI state to feature indication status for ISDN client u

19、ser 22Figures1 MWI activation and deactivation information flows. 62 Functional model 73 MWI activation attempts . 314 MWI deactivation attempts . 325 MWI activation attempts for Detailed Notification . 336 MWI deactivation attempts Detailed Notification 347 Successful activation/deactivation of MWI

20、 at TE (Stutter Dial Tone subscription option of MWN) 358 Successful activation/deactivation of MWI at TE (Feature Indication subscription option of MWN) 359 Successful activation/deactivation of MWI at TE (Detailed Notification subscription option of MWN) 3610 Unsuccessful MWI activation/deactivati

21、on attempts. 3711 Invoke component: ISDN access - SS7 . 5012 Error codes: SS7 - ISDN access 50iiForeword (This foreword is not part of American National Standard T1.622-1999.)This standard is a revision of T1.622-1992 and is one of a series of standards on In-tegrated Services Digital Network (ISDN)

22、 supplementary services. The standard be-ing updated defines and describes Message Waiting Indicator Control andNotification service capabilities in the context of the ISDN. This standard provides theswitching and signaling specifications to allow a Message Storage and Retrieval(MSR) System to infor

23、m its client users about the status of messages recorded at theMSR System. The Message Waiting Indicator Control capability provides a methodfor the MSR System to request the ISDN to update a logical entity, called a MessageWaiting Indicator (MWI), which is maintained by the ISDN and which is associ

24、atedwith the Directory Number of the client user. The state of this MWI indicates whetheror not messages are waiting for the client user in the MSR System. The MessageWaiting Notification capability provides methods for the ISDN to indicate the status ofthe MWI to the client user. The form of this i

25、ndication is dependent on the client us-ers subscriptions. This standard includes the Digital Subscriber Signaling SystemNo. 1 (DSS1) and the Signaling System No. 7 Transactions Capabilities ApplicationPart protocol and procedures to support these capabilities. This revised standard also includes T1

26、.622a-1998, the supplement to T1.622-1992,which revised the standard to improve and expand its applicability, in particular, wheninterfacing to an NT2.Service providers of Message Storage and Retrieval services will find this standard tobe useful in providing a consistent suite of protocols and proc

27、edures to support theservice capabilities described in this standard. Manufacturers of user and networkequipment that use the Integrated Services Digital Network (ISDN) and SignalingSystem No. 7 can apply this standard to the design and development of their prod-ucts.Suggestions for improvement of t

28、his standard are welcome. They should be sent tothe Alliance for Telecommunications Industry Solutions, 1200 G Street, NW, Wash-ington, DC 20005.This standard was processed and approved for submittal to ANSI by AccreditedStandards Committee on Telecommunications, T1. Committee approval of the stan-d

29、ard does not necessarily imply that all committee members voted for its approval. Atthe time it approved this standard, Accredited Standards Committee T1 had the fol-lowing members:Gerald H. Peterson, ChairmanE. Raymond Hapeman, Vice-ChairmanS. Carioti, T1 DisciplinesS. D. Barclay, T1 SecretariatJim

30、 Lord, Technical EditorOrganization Represented Name of RepresentativeEXCHANGE CARRIERSAmeritech . L. Richard WoodLarry A. Young (Alt.)AT Canonical Encoding Rules (CER) and Distinguished Encoding Rules(DER)1)3 Definitions3.1 client user: The user for whom messages are stored at an MSR System. The cl

31、ient user maybe served by an ISDN access. Client users not served by an ISDN access are beyond the scope ofthis standard, but specifications for them may be found in T1.611.3.2 Message Storage and Retrieval (MSR) System: The system that provides message entry,storage, and retrieval capabilities to c

32、lient users and calling users. The MSR System shall be allowedto be served by an ISDN access interface as described in this standard (or by existing nonstandardinterfaces).3.3 Message Waiting Indicator (MWI): A logical entity assigned to the client users Directory Num-ber (DN), which allows the clie

33、nt user to be informed that messages are waiting at an MSR System forthat DN.3.4 MSR System Identification (MSR Identifier): A parameter used to uniquely identify an MSRSystem (or a service provided by an MSR System).3.5 network: In this description, Network refers to all telecommunications equipmen

34、t that has anypart in processing a call or a supplementary service for the referred to user. It may include Local Ex-changes, Transit Exchanges, and NT2s but does not include the ISDN terminal and is not limited tothe “Public network” or any other particular set of equipment.3.6 service provider: Th

35、is is a company, organization, business, etc., that sells, administers,maintains, charges for, etc., the service. The service provider may or may not be the provider of thenetwork.3.7 Stutter Dial Tone: A distinct form of dial tone provided to the MWI client user upon call origina-tion. It consists

36、of a tone of the same frequency and level as normal dial tone (typically 350 + 440 Hz),but it is applied first in bursts of 0.1 seconds on, 0.1 seconds off for at least 2.5 seconds, followed bysteady on.T1.622-199934 Description of the Message Waiting Indicator Control and Notification servicesfrom

37、the users perspectiveMWI Control and Notification allows an MSR System to inform its client users about the status of mes-sages recorded at the MSR System. When messages are waiting for a client user at the MSR Sys-tem, the MSR System requests the network to provide a message waiting indication for

38、the DirectoryNumber associated with the client user. When all messages are retrieved by the client user or other-wise removed by the MSR System, the MSR System requests the network to remove message waitingindication for the Directory Number associated with the client user.4.1 DescriptionMWI Control

39、 is a service provided by the network to an MSR System provider. The MSR System mayrequest the network to provide an indication to one of its client users that messages are waiting at theMSR System. It may also request that the network remove this indication when all messages are re-trieved by the c

40、lient user or otherwise removed by the MSR System. The client user is identified by aDirectory Number in these requests. The MSR System may include a bearer capability in the request.This information would enable the client user to distinguish between notification for different types ofmessaging (e.

41、g., voice mail or e-mail). The MSR System may also include additional optional infor-mation about the waiting messages, e.g., the number of messages waiting. If the network supportssuch optional information, the network may pass it to the client user. If the network does not supportsuch optional inf

42、ormation, the network may discard it and continue processing the MWI request, orreject the request, at the network providers option.MWN is a service provided by the network to client users of an MSR System. When MWN service isassigned to a client users Directory Number, the client user can receive n

43、otification that messages arewaiting at an MSR System, or that all messages have been retrieved or otherwise removed by theMSR System. This notification can take several forms which include Stutter Dial Tone, Feature Indi-cation, or Detailed Notification, as specified at subscription time. MWN shall

44、 be defined so as to allowthe network to provide to the client user information about waiting messages, e.g., number of waitingmessages, or message priorities (as determined by the MSR System), if such information is providedby the MSR System. MWN shall be defined so as to allow the network to provi

45、de this additional infor-mation to the client user, if such information is provided by the MSR System. MWN shall be definedso as to provide information that would enable the client user to distinguish between notification fordifferent types of messaging (e.g., voice mail or e-mail), if such informat

46、ion is provided by the MSRSystem.T1.622-19994Table 1 Subscription options for client user (per ISDN number)Subscription options ValuesNumber of MWIs subscribed to 1 to N (Note 1)For each subscribed MWI:MSR Identifier (Note 2)Stutter Dial Tone form of notificationFeature Indication form of notificati

47、onDetailed Notification form of notificationSet of allowed “bearer services”(Note 4)10 digit number (Note 3)Yes/NoYes/NoYes/NoList of services from T1.620NOTES1 The maximum allowed value of N is a service provider option.2 When only one MWI is subscribed to, the MSR identifier is optional.When more

48、than one MWI is subscribed to, all but one MWI must have anassociated MSR identifier assigned.3 This number is provided by the client user after negotiation with the MSRservice provider.4 The inclusion of this subscription option is a network option. If this sub-scription option is not provided, all

49、 bearer services are allowed.An ISDN client user with MWN service can have one or more MWIs per Directory Number. If an ISDNclient user has a single MWI, that MWI may be associated with a particular MSR System provider us-ing an MSR Identifier, as a service provider option. If an MWI is assigned an MSR Identifier, then onlythe MSR System associated by the network with that MSR Identifier may control the MWI. If an MSRIdentifier is not assigned to an MWI, then that MWI may be controlled by the network at the request ofany MSR System provider. (This is to allow for casual use of