M o b i l e S t a ti o n ( M O C ) B T S / B S C ( B S S ) M S C V L R ( N S S ) M o b i l e S t a ti o n

( M T C )

Conversation

A s a l a m O A l l i k u m

Call Release

End Button Press

CC Disconnect

Call is released at Destination endDisconnect Voice

CircuitCC Release

CC Release Completed

M o b i l e S t a ti o n ( M O C ) B T S / B S C ( B S S ) M S C V L R ( N S S ) M o b i l e S t a ti o n

( M T C )

RR Connection Release

RR Channel Release

Clear Command

Clear Complete

Free TCH

Call Released Indication (Idle

Mode)

M o b i l e S t a ti o n ( M O C ) B T S / B S C ( B S S ) M S C V L R ( N S S ) M o b i l e S t a ti o n

( M T C )

Enable Ciphering

Ciphering Mode Command

Ciphering Mode Command

Ciphering Mode Complete Ciphering Mode Complete

RR Connection Establishment Complete

At this point Connection has been Established between MS and MSC

Call SetupCC Setup (Dialed Digits)

CC Call Proceeding

User will get connecting… message

M o b i l e S t a ti o n ( M O C ) B T S / B S C ( B S S ) M S C V L R ( N S S ) M o b i l e S t a ti o n

( M T C )

Let’s Talk to DAD!!

Begin RR Connection Establishment

RR Channel REQ (RACH)

Immediate Assignment (AGCH, Tch/freq Correction

RR SABM+MM CM Service REQ

RR Unnumbered ACK (UA)

MM CM Service REQ

Check Subscriber Authentication