Specifications

1-18 800 MHz System Planner R4-11-4G
PRIVATE DATATAC SYSTEM PERFORMANCE
PRM 660
1.6.4 PRM 660
The PRM 660 is an integrated radio modem based on the Motorola
INFOTAC® portable radio modem in a compact, self-contained unit built in
a rugged housing. The PRM 660 is designed for dedicated, data-only
applications.
Wireless access is possible through an internal 3-watt transceiver and flip-up
antenna. An LCD and function keys are built into the unit to provide an
easy-to-use interface for modem set up and operation. Labels on the LCD
identify the function keys. Plain text help information can be reviewed on the
4-line by 20-character display, as needed.
1.7 Private DataTAC System Performance
Radio coverage reliability and availability have a large effect on system
response time and capacity. The field engineer must accurately model the
future customer operations and conditions to design a network that meets
the customer’s requirements. Motorola System Engineering can predict
capacity and response times using the Private DataTAC network
performance simulator. This simulation provides estimates and statistics of
network capacity and end-to-end message delivery and acknowledgment
delay.
This simulation, when used with specific customer requirements and data
from the system analysis, produces accurate results upon which to base
design decisions. This procedure permits analysis of the effects of application
efficiency and radio coverage design alternatives before actual
implementation. The result of this simulation helps the system engineer
decide the suitable topology and equipment the customer needs.
1.7.1 Capacity Issues
System capacity depends on the individual capacities of key products and
links including:
• Host Capacity
• Host Link Capacity
• WNG Capacity
• RNC Capacity
• Radio Channel Capacity
• Mobile Computer Messaging Capacity
• System Response Time
This system planner refers to a standard message profile for illustrative
purposes to define the network and device capabilities. This profile does not
represent the customer’s network operations. For the customer’s particular