Walker County (AL)

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Walker County Fire

Most Walker County fire departments are dispatched by 911 Control on 159.39000 (167.9 PL) over three transmitters at different sites in the county. A different PL tone is used on 151.28000 to access the receiver of each site. A courtesy tone (or lack thereof) following each transmission indicates which site is in use.

Site	Tone In	Courtesy Tone
West	156.7 PL	none
South	167.9 PL	1750 Hz (high)
North	179.9 PL	1000 Hz (low)

Automatic station identification transmissions begin with alternating 880 and 480 Hz tones. A prerecorded voice ID of "WQQG392" is followed by "north", "west" or "south", indicating which transmitter is identifying. The courtesy tone for that site is sent at the end of the transmission.

Certain repeater site conditions can also trigger prerecorded voic alarms such as "door open", "door closed", "generator on" and "generator off"; these announcements take the same format as the IDs, but with the condition in place of the call sign.

Tone Outs

Each fire department dispatched on 159.39000 has a unique A tone; the B tone 788.5 Hz is common to all. County-wide paging is achieved by sending just an eight-second B tone.

Department	Tone A (Hz)	Tone B (Hz)
Argo	349.0	788.5
Curry	457.9	788.5
Jasper	539.0	788.5

Jasper

Jasper Fire Rescue

Jasper Fire was previously dispatched over Walker County's fire frequency, and would switch to their frequency for response, but it appears now that all paging and communications take place on the Jasper Fire frequency.

Jasper Police Department

Jasper Police uses P25 on their frequency now, but the analog side is still active Output: 155.55 PL: 110.9 Input: 153.92 PL: 103.5

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