Specifications

Dispatch Call Types
Dispatch Call Processing
4-12 68P81095E55-E August 08, 2000
Wide Area
Dispatch Group
Call
Wide Area Dispatch Group Calls are a broadcast to every MS member in the callers
selected (active) group. Once a group is selected and a Wide Area Group Call is
initiated, all members of the group within the service area defined by the fleet’s
provisioning will be hailed and activated on the group call (Table 4-6).
Table 4-6 Wide Area Group Call Selection
With SR 8.0 a wide area group call will include members of the group that are
outside the region is the service is supported by both region’s provisioning. Prior to
SR 8.0 cannot wide area group call outside the region.
Example Call Scenarios of Wide Area Group Calls are shown in Table 4-7
Table 4-7 Wide Area Call Scenario
Call Alert A Call Alert is a dispatch call request. It used to notify the called party that voice
communication is desired.
The calling party selects call alert on the MS (Call Alert mode) and then enters the
Called MSs Fleet Member ID, or, selects an alias for the pre-programmed list. The
calling MS receives an acknowledgment (ACK) if the request is successfully
delivered.
An audio tone and a visual indicator on the called MS informs the user of Call Alert.
The Call Alert displays and stores the calling MSs Fleet Member ID (or alias) on the
called MS. This can be used to simplify call back. The called MS may then select the
alert on the MS and initiate a callback. The called MS may also delete the alert.
Deleting the call alert does not stop the returned Acknowledgement.
The entire Call Alert procedure takes place on the PCCH or the SCCH so no talk
channel resources (TCH) resources are used.
MS User Selects System Locates and Includes
Wide Area Group • Members of the Group in entire coverage area
Event/State Notification
MS in service area If target MS and resources available,
Successful Call
MS is out of service area N/A
MS enters service area and is on an active
GC cell
N/A
MS that leave service area N/A
MS powers up during group call while in
area
MS will be brought into the active call
MS ends another service within service area
and is on group call area
MS will be brought into the active call.
MS ends another service within service area
and is not on group call area
MS remains idle. If MS attempts a Group
Call, or other active MS enters cell, it will be
brought into the active call.
MS ends a service out of service area N/A
MS ends a service and enters active group
call area
N/A