PS-SAU-1900E
Mar. 8
th
,1999 (Rev. 0.0)
--- CONFIDENTIAL AND PROPRIETARY ---
23
the LAU receives and locks onto a valid CDMA Pilot and
Sync channel.
SYSTEM LOST State:
This is actually a major sub-state of the Qualcomm MSM
code. The LAU relates to this sub-state by virtue of how it
presents to the end user the fact that no system is
presently registered.
CONFIGURATION / TEST State:
This state is entered when a serial communications device
is connected to the LAU’s external serial port. While
operating in this sub-state, the LAU does not attempt to
access a base station, and will not provide support for
incoming calls. It will accept configuration information and
will also perform certain operational tests, as instructed
from the remote configuration terminal.
IDLE State:
The LAU is linked to a base station, and is waiting for input
from either the INCOMING or the OUTGOING call states,
the CONFIGURATION / TEST state, or the SYSTEM LOST
state.
OUTGOING CALL State:
The LAU enters this state when a hook switch transition is
detected on the analog telephone interface. The LAU then
initiates the necessary control sequence to receive dialed
digits, seize an RF channel, and place the call. If an
incoming call occurs prior to the time that the dial string is
sent to the B/S, then the LAU will terminate the
OUTGOING call state.
INCOMING CALL State:
The LAU enters this state when an ALERT message is
received from the base station, indicating an incoming call.
The LAU then applies the appropriate ring treatment to the
telephone interface, sends caller id data (if configured to do
so), and awaits the receipt of the switch hook transition
interrupt from the analog telephone circuit. Once received,
it then connects the voice paths.
CONVERSATION State (Not Shown):
The LAU enters this state from either the OUTGOING
CALL state or the INCOMING CALL state. The LAU is
primarily involved with providing and maintaining a suitable
voice path. It also continuously monitors the analog loop
interface and J-STD-008 air interface for any one of several
events which would signal a change or termination of the
CONVERSATION state.
3.1.2.
INCOMING CALL State.
The state diagram for this operating state is shown below.
