IMSI attach and detach via SGSN

Benefit

-Reduce the registration time, improve user experience

-Save the radio resource

Co-ordination of LA update and RA update

Benefit

-   Save the radio resource

Paging for a CS connection via the SGSN

Benefit

-Save the radio resource

Detailed signaling flow refers to 3GPP 23.060, 29.018

Gs interface is use for priority the voice call during data session..........

Yes we are using Gs only for E// BSC