It is a part of the MAP protocol, e.g. MAP V3 / V4.
The message is used to query a HLR / HSS for customer location and status information. Having the Location and the status (e.g. IMSI attached, detached, etc..) of the customer a CAMEL application (gsmSCF) can decide on what actions can be taken.
For CAMEL you will need a minimum of CAP V2 and MAP V3.
VBR/ Wallis Dudhnath
Prem Negi - 9th April 2019 (12:21 GMT)
Hi MTC, ATI message generally carrying OICK of B party. where as ATSI carry Late CF details with SS barring details.
Mtc - 25th April 2011 (08:20 GMT)
Is this ATI is used in GSM for any Purpose ?
MAP-ATI-Any Time Interrogation
Can you provide a small brief ?
Scot - 31st October 2003 (05:08 GMT)
Used to Inetrrogate HLR for some Supplementary Service Procedures...