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Chapter 6, Call Processing Subsystem
Using the CALL BIT Screen
Using the CALL BIT Screen
Selecting The Message Content Generation Method
The contents (i.e. bit patterns) of the signaling messages sent to the mobile station
on the forward control channel and the forward voice channel are generated using
one of two methods. Method 1 uses the formats defined in the applicable industry
standard to build the contents of the signaling messages. Method 2 uses the bit
patterns which the user defines on the CALL BIT screen to build the contents of
the signaling messages.
The
Data Spec field on the CALL BIT screen determines which method will be
used to build the contents of the signaling messages.
• Std -The Test Set will use the signaling formats defined in the applicable industry
standard to build the forward control channel and forward voice channel signaling
messages. The Test Set will use the contents of the applicable fields on the CALL
CONTROL screen and the CALL CONFIGURE screen to obtain information
necessary to build the messages. Whenever a signaling message is used, the Test Set
will update the contents of all fields in that message on the CALL BIT screen.
• Bits -Use the bit patterns as set on the CALL BIT screen to build all forward control
channel and forward voice channel signaling messages. For any call processing
function (that is, setting the message stream on the active control channel, registering
the mobile station, paging the mobile station, handing off the mobile station or releasing
the mobile station) the user is responsible for setting the contents of all signaling
messages used in that function. The Call Processing Subsystem uses the messaging
protocol as defined in the applicable industry standard.
NOTE: The contents of the applicable fields on the CALL CONTROL screen and the CALL
CONFIGURE screen are not updated to reflect any changes made while in the Bits mode.
There is no coupling between the Bits mode and the Test Set. For example: if a mobile station
was actively connected to the Test Set on a voice channel and the user changed the CHAN field
on the forward voice channel mobile station control message (FVC V Mes) and sent that
message to the mobile station, the mobile station would change its voice channel assignment.
However, the Test Set will stay on the voice channel assignment specified in the Chan: field
on the CALL CONTROL screen. This situation will result in a dropped call. The Bits mode
should not be used to change any parameter that can be set on any other Call Processing
Subsystem screen.
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