SHERIFF'S WIRELESS SERVICES DIVISION

William B. Kolender, Sheriff Curt Munro, Manager

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ABOUT US

VISION:

To provide seamless wireless communications for public safety/service agencies serving about 3,000,000 people in San Diego County.

To provide RCS users with wireless interoperability with other local systems.

INTEROPERABILITY means law, fire, EMS and public service can talk readily with each other
to coordinate life saving responses.


Wireless Communication Design Goals:

The RCS design objectives:

Improve interoperability with existing 800 MHz systems.
Provide highly reliable wireless voice and data networks.
Provide 95% wireless coverage of the roadway network.
Provide wireless access for a variety of computer applications, including:
Automatic Vehicle Location (AVL)
Law enforcement databases
Computerized dispatch operations.


Proven Benefits of Approach

Interoperability

Improved user safety (encrypted voice and AVL).
Increased efficiency of diminishing resources.
Enhanced wireless coverage.
Enhanced disaster communications capability.
Economies of scale and scope.


Coverage - Terrain

Coverage Area:
Two of California's largest counties
Nearly 10,000 square miles
Over 185 miles of US - Mexico border

Terrain:
Sea Level at San Diego
Over 7,000 feet at Palomar Mountain
100 feet below sea level in City of Calipatria

Technical Summary - Voice

Motorola SmartZone 800 MHz
Trunked, simulcast
Mixed mode analog/digital
Not APCO 25
Embassy switch
IMBE voice coder
Digital encryption capable
Extensive geographical coverage
Currently 45 microwave repeater sites (both counties)
43 repeater sites in San Diego County
Three simulcast cells (18 repeaters)
29 stand-alone, non simulcast repeaters (mountainous areas)

Over 150 frequency pairs (POWER OF SHARING!)
12.5 KHz, 821 MHz (NPSPAC)
25 KHz, 806 MHz

95% coverage performance requirement.
Performance exceeds 97%.


Technical Summary - Data

Voice and data systems are separate networks
29 repeater sites

Motorola 800 MHz
19.2 KBPS
RD-LAP Protocol
Supports other frequency spectrum

Permits various data applications, including AVL

Data network provides significant growth capability

95% coverage requirement; exceeds 97%.