ITU

Committed to connecting the world

ITU-T Recommendations

Search by number:
Others:
Skip Navigation Links
Advanced search
Provisional name
ISO/IEC Number
Formal description
Study Groups tree viewExpand Study Groups tree view

ITU-T E.115 (05/2010)

عربي | 中文 | English | Español | Français | Русский
Computerized directory assistance
Recommendation ITU-T E.115 specifies the protocol, called the directory assistance protocol, to be used for directory assistance information exchange among service providers. This supports assistance/inquiry as part of the international telephone operator service allowing detailed information about subscribers business categories, localities, provinces and streets to be retrieved. This Recommendation also gives a description of the principles and procedures to be followed in interconnecting different national computerized directory assistance services. It specifies a protocol that allows exchange of information retrieved from databases with very advanced search capabilities. It specifies two versions of the protocol. Version 1 specifies basic functions, while version 2 of the protocol provides enhancements and uses HTTP as the underlying service and uses XML for protocol encoding. Version 2 of the protocol provides support for different language groups and provides possibility for location-based services. Version 2.10 of the protocol provides important additions to allow directory assistance service providers to exchange information about the databases supported, the functionalities that are available and requirements on input quality.
Citation: http://handle.itu.int/11.1002/1000/10836
Approval date: 2010-05-29
Approval process:AAP
Status: In force
Maintenance responsibility: ITU-T Study Group 17
Further details: Patent statement(s)
Development history
Ed. ITU-T Recommendation Status Summary Table of Contents Download
12.1 E.115 (2010) Cor. 1 (10/2012) In force - - here
12 E.115 (05/2010) In force
here
here
here
11 E.115 (05/2008) Superseded
here
here
here
10 E.115 (05/2007) Superseded
here
here
here
9.1 E.115 (2006) Cor. 1 (06/2006) Superseded - - here
9 E.115 (02/2006) Superseded
here
here
here
8 E.115 (02/1995) Superseded
here
here
here
7 E.115 (03/1993) Superseded -
here
here
6 E.115 (03/1991) Superseded -
here
here
5 E.115 (11/1988) Superseded -
here
here
4 E.115 (10/1984) Superseded - - Not available
3 E.115 (11/1980) Superseded - - Not available
2 E.115 (10/1976) Superseded - - Not available
1 E.115 (12/1972) Superseded - - Not available