Specifications

Dispatch Application Processor
iDEN® System
2-12 68P81095E55-E August 08, 2000
Input Output
Controller
The Input Output Controller (IOC) cards provide for the connection of external
equipment. In most cases synchronous V.35 may be used to handle frame relay
communications (dispatch call and packet data processing) with the MPS and
Operations and Maintenance communications. Some installations may use another
card to provide a single port to an Ethernet LAN transceiver for Operations and
Maintenance. The Ethernet LAN controller is a single-height IOC Card. The
Synchronous controller is a double-height card.
Central Processing
Unit
The Central Processing Unit (CPU) provides the central processing engine and
memory for the DAP. There are two CPUs in the processor shelf for each hardware
fault-tolerant processor. CPUs provide the logic circuits to execute dispatch
processing code and access the databases for service and location information.
Router Controller
Cards
The Router Controller Cards (ROCs) manage communications routing of control
signaling and Operations and Maintenance information between the DAP processor
and the rest of the system. There are two cards for redundancy and fault tolerance.
Mass Storage
Devices
The DAP mass storage devices are used to store and maintain the operating software
and databases. Tape backup and CD-ROM devices are also available. All of these
devices are SCSI. The databases contain the identification, location and
authentication information for dispatch enabled MSs.
Functional Characteristics
The DAP is the processing entity responsible for the overall coordination and control
of Dispatch and Packet Data services. The DAP has been optimized to support rapid
response time for services, which include but are not limited to: Group calls, Private
calls, Call Alerts, Emergency calls and Packet Data networking. To increase
subscriber capacity, the DAP may be expanded to form a six-DAP cluster. The DAP
provides:
• Control for all Dispatch and Packet Data functions
• First-time registration for all Interconnect and Dispatch subscribers
• Maintenance and tracking of MS mobility (Dispatch and Packet Data)
• Alarms and performance statistics for the OMC
• Maintenance of all Dispatch subscriber provisioned information
Dispatch and
Packet Data
Control
The DAP assigns the signalling and routing paths for Dispatch calls and Packet Data.
When the MS requests service the DAP verifies the mobile, confirms the services
availability to the MS, and processes the request (See Dispatch Call Processing).
First-time User
Registration
When an MS is powered-on, the MS sends a service request. If the mobile’s
identification is not valid in the system, service is denied. (See Over-The-Air
Programming).
Dispatch Mobility The DAP maintains the last known dispatch location area for all active and recently
active MSs. This is used by the DAP to route calls (See Dispatch Call Processing).