1、 ATIS-0300209.2018 (Revision of ATIS-0300209.2013) American National Standard for Telecommunications Operations, Administration, Maintenance, and Provisioning (OAM Reorder Tone; and Special Information Tones. Announcements addressed include: Reorder; No Circuit; Vacant Code; Intercept; and Ineffecti
2、ve Other. The tones and announcements delineated above are used in the Public Switched Telephone Network (PSTN). This standard also addresses the mapping of Cause Indicator Values specified for the ISDN User Part (ISUP) and Digital Subscriber Signaling System Number 1 (DSS1) in ATIS-1000113 and ATIS
3、-1000607 and ATIS-1000607.a, respectively, and the tones and announcements identified in this standard. This mapping is for use in call processing involving two or more interconnecting networks (ICNs) when Signaling System Number 7 (SS7) is used for call control. This standard considers the provisio
4、n of these tones and announcements by originating, intermediate, and terminating ICNs. All other tones and announcements and the mapping of other Cause Values not included in this standard are candidates for further study for inclusion in this document in the future. 1.2 Purpose This document provid
5、es guidelines intended to standardize the application of tones and announcements to differentiate ineffective call conditions. This standard also provides guidelines to be used as a basis for the provisioning of tones and announcements in an SS7 environment by ICNs. ATIS-0300209.2018 2 1.3 Applicati
6、on This document is intended to be used by Telecommunication Service Providers and vendors to standardize the use of tones and announcements for the treatment of ineffective call attempts within the PSTN for SS7 and non-SS7 environments. 2 References The following standards contain provisions which,
7、 through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possib
8、ility of applying the most recent editions of the standards indicated below. 2.1 Normative References ATIS-1000113, Signalling System No. 7 (SS7) - Integrated Services Digital Network (ISDN) User Part.1ATIS-1000607, Integrated Services Digital Network (ISDN) - Layer 3 Signaling Specification for Cir
9、cuit Switched Bearer Services for Digital Subscriber Signaling System Number 1 (DSS1).1ATIS-1000607.a, Supplement to ATIS-1000607.1TIA/EIA-825, A Frequency Shift Keyed Modem For Use On The Public Switched Telephone Network.22.2 Informative References ATIS-0600401, Network to Customer Installation In
10、terfaces - Analog Voicegrade Switched Access Lines Using Loop-Start and Ground-Start Signaling.1ATIS-1000609, Interworking between the ISDN User-Network Interface Protocol and the Signalling System Number 7 ISDN User Part.1ITU-T Recommendation E.180, Technical Characteristics of Tones for The Teleph
11、one Service.3ITU-T Recommendation E.182, Application of Tones and Announcements in Telephone Services.3GR-674-CORE, LLSGR: Special Information Tones (FSD 20-06-0500), Issue 1 (Telcordia). 4Telcordia SR-2275, Telcordia Notes on the Networks, Issue 4.4Telcordia FR-64, LATA Switching System Generic Req
12、uirements (LSSGR).4ATIS-0300019, Next Generation Interconnection Interoperability Forum (NGIIF), NGIIF Reference Document, Version 12, Part 3 Installation, Testing and Maintenance Responsibilities for SS7 Links and Trunks, Attachment H, SS7 Cause Code and Tones 2. Paging equipment busy; 3. Direct In
13、ward Dial trunk busy; 4. Network access lines busy; and 5. Network Management controls for mass calling 4.2 ReOrder (RO) This tone indicates that the calling customers call has been blocked. The RO tone is a low-frequency tone provided at 120 IPM and should be applied under the following conditions:
14、 1. Internal switching blockage; 2. Failure to receive wink on an interoffice call attempt; 3. Insufficient or mutilated digits; 4. Failure to find an available resource; ATIS-0300209.2018 5 5. Interoffice signaling link failure; 6. All announcement trunks busy; 7. Switching equipment congestion; an
15、d 8. Protocol errors. 5 Special Information Tones Special Information Tones (SITs) are three precise sequential tones. They precede and are used to identify recorded announcements provided for ineffective call attempts in the PSTN. SITs should be used with announcements when practical. These tones e
16、nable automated call detection and analysis systems to classify ineffective call attempts. The classifications of call-disposition categories are: 1. No Circuit (NC); 2. Reorder (RO); 3. Vacant Code (VC); 4. Intercept (INT); and 5. Ineffective Other (IO). In the SS7 environment, a similar capability
17、 to SITs is available by using the cause value and location indicators contained in the SS7 message as described in ATIS-1000113.2015. The mapping of Cause Values and location indicators to specific SITs is for further study. 5.1 Encoding Scheme The encoding scheme consists of three tone segments wi
18、th precisely defined frequencies and durations as depicted in Figure 5.1. These are consistent with ITU-T Recommendation E.180 (see Annex A). The first and second tone segments may be short or long duration in either the lower or higher part of the frequency band. The third segment may be of short o
19、r long duration, but only the lower frequency should be used. The single frequency in the third segment provides a reference frequency for automated detection and analysis systems. The number of possible encodings allowed by this scheme is 32. ATIS-0300209.2018 6 Figure 5.1 Encoding Scheme for Speci
20、al Information Tones 5.2 Frequencies and 2. The customer should try the call again later. 6.2 Reorder (RO) The RO announcements should be applied under the following conditions: 3. Internal switching blockage; 4. Failure to receive wink on an interoffice call attempt; 5. Insufficient or mutilated di
21、gits; 6. Failure to find an available resource; 7. Interoffice signaling link failure; 8. All announcement trunks busy; 9. Switching equipment congestion; and 10. Protocol errors. ATIS-0300209.2018 9 The content of the RO announcements should include the following information: a) The call did not go
22、 through the network; and b) The customer should try the call again later. 6.3 Vacant Code (VC) The VC announcements should be applied under the following conditions: 1. Vacant code; 2. Unauthorized CAMA “1“ or “0“ plus unauthorized code; 3. Nonworking 911; 4. Out-of-Area; 5. Terminating end-office
23、or terminating tandem receives digits for nonsubtending code; 6. No route to the specified transit network; and 7. No route to destination. The content of the VC announcements should include the following information: a) The call cannot be completed as dialed; and b) Instructions appropriate for the
24、 condition encountered. 6.4 Intercept (INT) The INT announcements should be applied under the following conditions: 1. Number change; 2. Vacant number; 3. Disconnected number; 4. Nonworking number; 5. Temporarily suspended service; and 6. Incoming call restriction. The content of the INT announcemen
25、ts should include the following information: a) The reason the call cannot be completed; and b) Instructions appropriate for the condition encountered. 6.5 Ineffective Other (IO) The IO announcements should be applied under the following conditions: 1. Prefix or Access code dialing error irregularit
26、y; 2. Improper initial coin deposit; 3. Screened line access denial; and 4. Dialing irregularity. The content of the IO announcements should include the following information: ATIS-0300209.2018 10 a) The call cannot be completed as dialed; b) Instructions for correct dialing procedures; and c) The c
27、ustomer should try the call again (except for Customer Calling Feature condition). 7 Other Tones or 2. If interworking is encountered anywhere in the connection, Cause Values which indicate ineffective call attempts should be returned as close to the originating ICN as possible. If an ICN has a need
28、 not met in the application of tones and announcements as described in this paragraph, local agreements between affected ICNs will need to be developed. These agreements are outside the scope of this standard. 8.2 Cause Value to Tones & Announcements Mapping The application of a tone or announcement
29、 by an ICN is based on a cause value and should be in accordance with the Network Interconnection Interoperability Forum (NIIF) SS7 Cause Codes Matrix, except when specific agreements exist between ICNs. The NIIF SS7 Cause Code Matrix provides a listing of the Cause Values, the Definition, the Expec
30、ted Treatment and the appropriate Mapping of the Cause Values between interconnected networks. ATIS-0300209.2018 11 Annex A (informative) A TTY Announcements The following examples illustrate how SIT voice messages could be augmented with TTY messages. Minimum confusion to hearing users is achieved
31、by the insertion of only 3 TTY characters “_HD” (HOLD in TTY) ahead of the voice announcement. (“HD” is commonly used by TTY users to request that the other party wait for the resumption of the text conversation.) The corresponding TTY announcement is then appended to the end of the voice announceme
32、nt. This scheme is essentially transparent to hearing users for SIT type messages because they will only hear the short “blip” in addition to the SIT tone before the message. The use of an _HD as a prefix may not be appropriate for messages without a SIT preamble as the presence of a tone may cause
33、the hearing user to disconnect. The TTY code structure and signal requirements can be found in TIA/EIA-825. # Name SIT TTY Example Spoken Announcement Example TTY Announcement 1 Vacant or Disconnected number IC _HD Were sorry, you have reached a number that has been disconnected or is no longer in s
34、ervice. If you feel you have reached this recording in error, please check the number and try your call again. _NBR REACHED NOT IN SERVICE PLS CK AND REDIAL SKSK 2 Prefix in Error VC _HD Were sorry, it is not necessary to dial a 1 or 0 when calling this number. Will you please hang up and try your c
35、all again. _NO NEED TO DIAL 1 FIRST PLS REDIAL SKSK 3 Prefix Required VC _HD Were sorry, you must first dial a 1 or 0 when calling this number. Will you please hang up and try your call again. _MUST DIAL 1 THEN NBR PLS REDIAL SKSK 4 No Circuit NC _HD Were sorry, all circuits are busy now. Will you p
36、lease try your call again later. _ALL LINES BUSY PLS TRY LATER SKSK 5 Heavy Calling NC _HD Were sorry, due to heavy calling we cannot complete your call at this time. Will you please try your call again later. _ALL LINES BUSY PLS TRY LATER SKSK 6 Facility Outage NC _HD Were sorry, due to telephone c
37、ompany facility trouble your call cannot be completed at this time. Will you please try your call again later. _PHONE CO TROUBLE PLS TRY LATER SKSK 7 Reorder (Vacant Code) RO _HD Were sorry, your call cannot be completed as dialed. Please check the number and dial again. _CANNOT COMPLETE CALL AS DIA
38、LED PLS TRY AGAIN SKSK 9 Forced Ten Digit ( 0/1+NPA req.) VC _HD Were sorry, you must first dial a 1 or 0 plus the area code when calling this number. Will you please hang up and try your call again. _PLS REDIAL WITH 1 PLUS AREA CODE THEN NBR SKSK NOTES: References to dialing “0“ in the spoken versi
39、on have been eliminated in the TTY version as TTY users would dial the relay or the TTY operator, rather than the “0” operator, for assistance. “_” (underscore) represents a space. “” (down arrow) represents the TTY “letters” command. “” (up arrow) represents the TTY “figures” command. “SKSK” is used at end of each announcement to indicate that we are done keying and are disconnecting.
