Specifications

Dispatch Call Processing
August 08, 2000 68P81095E55-E 4-1
Chapter 4
Dispatch Call Processing
Dispatch calls are voice communications that use the half-duplex Push-To-Talk
(PTT) form of communication. This type of call does not use other provider
networks except as transport facilities. These calls may cross service areas if the
DAPs of both service areas are networked together and have shared processing
(provisioning and roaming agreements). Some iDEN systems are implemented as
dispatch-only. As dispatch-only, the interconnect portion of the system is not
installed and cannot be used. This chapter describes the fundamentals of the
Dispatch Call Processing. Further information is available in MSO Dispatch Sub-
System 68P80800H45 and MSO Dispatch Planning and Expansion 68P80800H85.
General Dispatch Calling
To support the logical Global, Fleet, Group and Member calls. Dispatch calling uses
most of the levels of the communications model. The model has different levels
(Figure 4-1). These areas are based on geographical areas. The areas are:
•Region
•Domain
• Service Area
•Location Area
•Cell
Figure 4-1 Logical Organization of Dispatch Locators
SA8
SA7
SA9
SA10
SA11
Service Area 1
(SA1)
SA2
SA14
SA13
SA12
SA5
SA6
SA3
SA4
Domain 0 = Market = Region
Domain 1
Doman 2
Domain 3
Domain 4
Location Area
Cell