ISO/IEC 15428:1999
ISO/IEC 15428:1999
The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site



This International Standard specifies the Wireless Terminal Location Registration supplementary service (SS-WTLR) and the

Wireless Terminal Information Exchange additional network feature (ANF-WTINFO), which are applicable to various basic

services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.

The Wireless Terminal Location Registration Supplementary Service (SS-WTLR) enables a WTM user to register at, or

de-register from, the current location within the PISN. The ability to register at different locations in the PISN at different times

enables the WTM user to maintain the provided services (including the ability to make and receive calls) at different access

points. De-registration is used to inform the PISN that the WTM user is temporarily unable to make use of the provided

services (including the receipt of incoming calls).

The Information Exchange Additional Network Feature (ANF-WTINFO) allows to exchange information about a WTLR user

between the Home Data Base and the Visitor Data Base.

Supplementary service and additional network feature specifications are produced in three stages, according to the method

described in CCITT Recommendation I.130. This International Standard contains the stage 1 and stage 2 specifications of

SS-WTLR and ANF-WTINFO. The stage 1 specification (clause 6 and 7) specifies the service/feature as seen by users of

PISNs. The stage 2 specification (clause 8 and 9) identifies the functional entities involved in the service/feature and the

information flows between them.

General information 

  •  : Published
     : 1999-11
  •  : 1
     : 29
  •  : ISO/IEC JTC 1/SC 6 Telecommunications and information exchange between systems
  •  :
    33.040.35 Telephone networks

Buy this standard

Format Language
std 1 145 Paper
  • CHF145

Life cycle

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)