SGA Missed Call Notification System (SGA-CN) offers an excellent solution to notify subscribers about their lost calls: it monitors the missed calls either originated or received by them. The Who Called service of SGA-CN provides text messages (SMS) about calls lost while the subscriber was unreachable (busy, switched off, left without coverage). The Notify Me service of SGA-CN is created for callers, who want to resubmit their calls when their previously unreachable peer becomes reachable again: the original caller gets a notification SMS when the called party turns reachable.

SGA-EIR is AITIA's implementation of the EIR, an essential part of the GSM/UMTS architectures. It is a database mainly used for checking the IMEI (International Mobile Equipment Identity) of mobile equipment against various service requests. The unique identifier of each handset can statically or dynamically be classified by the operator into white, black and grey lists, and before specific service initiations the EIR is interrogated via SS7 or SIGTRAN to reveal the status of the particular handset.

SGA-USSD provides full USSD Gateway functionality with various applications from roaming activation through balance enquiry to micropayment interfaces. AITIA provides a complete, modular, and scalable solution for such services by offering its own implementation of the USSD Gateway as well as several standalone services and multipurpose database interfaces.

AITIA’s SGA Location Server delivers reliable location data down to the size of the GSM cell. It essentially enables plotting the location of wireless users based on the cell information of their mobile equipment.

When a subscriber using the conditional redirection (e.g. voice mail) is logging on to a foreign network abroad, but is momentarily unavailable, incoming calls would typically have two calls built up - which will become easier with AITIA's new product.