Validate NAC Against System ID

(Trunking System, ASTRO 25)

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ENABLE.jpg Causes the radio to validate the upper 8 bits of the 16-bit System ID against the upper 8 bits of the 12-bit NAC (Network Access Code) received on the Trunking - control channel. If a match is not found, the radio does not attempt to register / affiliate to the Trunking site. DotBlue.png Therefore enabling this field allows the radio to quickly match a site's NAC code with its System ID and quickly reject interfering Trunking System control channels. This selection applies for the current Trunking System.

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If any site in the Trunking System is not configured this way then this field must be disabled.

Disabled.jpg When disabled, the radio does not attempt to match the upper 8 bits of the 16-bit System ID with the upper 8 bits of the 12 bit NAC (Network Access Code) code. DotBlue.png This allows the radio to operate on control channels having a NAC that is independent of this Trunking System's System ID. DotYellow.png The radio may take longer to reject interfering Trunking System control channels. This selection applies for the current Trunking System.

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When the Coverage Type field is set to “Inter-WACN Roaming”, this selection must be disabled; otherwise the CPS considers this selection invalid.

 

When the Coverage Type field is set to “Intra-WACN Roaming”, and DVRS Hardware Enable field is enabled, this selection must be disabled; otherwise the CPS considers this selection invalid.

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When the System Type field is set to "ASTRO 25", and

when the radio is model / option capable.

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Go to the ASTRO 25 Page