CahBojonegoro

Anytime Interrogation can provide a gsmSCF with information of subscriber in the CS and PS Domain.
When a gsmSCF send ATI to the HLR, It may include the domain i.e PS or CS Domain. If no domain is specified then CS Domain is assumed. The gsmSCF cannot request information from both domain in one ATI request.
Information that can be retrieved as follows:

• Location Information
• Subscriber State
• IMEI
• MS Classmark

ATI for CS Domain
Call flow of ATI for CS Domain is below

ATI for PS Domain

For PS Domain ATI , SGSN replace the function of MSC.

Subscriber state reported by SGSN can be one of the following state:

• Detached : Subscriber is not currently attached in SGSN
• CAMEL attached, MS not reachable for paging : The subscriber is attached, without active PDP context but the SGSN has not received a periodic location update for a pre-defined duration.
• CAMEL attached, MS may be reachable for paging : The subscriber is attached, without active PDP Context, the subscriber is assumed ( by SGSN ) to be reachable
• CAMEL PDP active , MS not reachable for paging : The subscriber is attached with one or more PDP context active but there has not been radio contact for a predefined duration.
• CAMEL PDP active, MS may be reachable for paging : The subscriber is attached with one or more PDP context active, the subscriber is assumed ( by SGSN ) to be reachable.
• Network_Determine_Not_Reachable : The HLR has indicated that the network can determine from its internal data that the MS is not reachable.