PS-SAU-1900E
Mar. 8
th
,1999 (Rev. 0.0)
--- CONFIDENTIAL AND PROPRIETARY ---
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The Far End party disconnects from the call. In this case, ringing is terminated, and the LAU returns
to the IDLE state.
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The system is lost. In this case, ringing terminates, and the LAU attempts to re-acquire a new base
station. Fast busy is applied if the user seizes the loop by lifting the analog telephone handset.
3.1.2.2.1.
Caller Identification Data Transmission.
Many widely available analog CPE devices are available to detect, decode, and display FSK data
transmissions on the analog telephone loop. This FSK data transmission is employed by telephone
service providers within a feature set known as Calling Line Identification, or CLID. The typical CLID
data transmission occurs between the first and second ring bursts of an incoming call. An FSK serial
data stream is encoded with time, date, calling party number, and often, Calling Party Name information.
This data stream is received, decoded, and displayed on the receiving device’s LCD.
In the J-STD-008 environment, CLID information is transmitted with the initial Alert message, in a format
known as Alert_With_Information. This message serves a dual purpose. It tells the LAU that a call is
incoming. This data causes the LAU to generate a ring burst to the analog interface. The message also
contains the calling party number information.
The LAU is then able to build an appropriate CLID message, by drawing the calling number information
from the Alert message, and the date / time information from the J-STD-008 system date / time
parameters which are continuously updated over the Pilot channel. This message is then transmitted to
the analog interface, following the first ring burst.
At present, the J-STD-008 interface does not support Calling Name delivery.
The LAU fills the name and number fields of the CID data string according to the following rules:
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The NAME field is always filled with “Absence of Name”, and the reason is “Unavailable or Out of
Area”. The LAU has the capability to transmit name information, but this feature is not currently
supported by the CDMA system.
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Only numeric digits are expected and tested for in the Alert_With_Information message. Alpha
characters are not expected, and are not tested for.
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The “PRIVATE” indication will be sent if the Presentation Indicator bits specify “Presentation
Restricted”.
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The CALLING NUMBER will be transmitted if the Presentation Indicator bits specify “Presentation
Allowed”.
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The “OUT OF AREA” indication will be transmitted if the Presentation Indicator bits specify
“Number Not Available” or “Presentation Reserved”.
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Date and Time information is loaded with the CDMA System Date and System Time information.
3.1.3.
Call Placement State.
The following state diagram outlines the general requirements for the software flow during the call
placement stage.
