Emergency Talkback Revert Key Select

(Trunking Personality, General)

Selects the secure encryption key used while operating in emergency mode for the Emergency Talkback Revert Talkgroup. This selection applies for the current Trunking Personality.

When the ASTRO OTAR field is "Enabled" for the referenced Trunking System, this Key Select value is chosen from the Secure Hardware Encryption Key References List of the Secure KMF Profile selected in the KMF Profile Index field of the referenced Trunking System.

Be aware that the CPS is actually pointing to the Keys of the Encryption Key List for this selection; individual Keys from the Secure Hardware Encryption Key References List reference the Encryption Key List's Keys from the Hardware Key Reference field. Therefore any key selected when ASTRO OTAR is enabled, must first be defined in the Secure Hardware Encryption Key References List.

When the ASTRO OTAR field is "Disabled" for the referenced Trunking System, this Key Select value is directly chosen from the Secure Wide Window's Encryption Key List.

When there is a match between the normal Talkgroup ID being used by other radios and this radio's Emergency Talkback Revert Talkgroup ID, and…

when there is not a match between the normal Talkgroup Key being used by other radios and this Emergency Revert Talkgroup Key…

The following is true:

When this radio switches to its Emergency Talkback Revert Talkgroup ID using this key, this radio's emergency transmission is not heard by these other radios.
However, the emergency transmission may be picked up by scan, even when there is not a key match.

When the Emergency Talkback Secure / Clear Strapping field is set to "Secure" or "Select",

And

(When the Secure Operation field is set to "Hardware"),

(when the Secure Operation field is set to "Advanced Digital Privacy", and

when the Protocol Type field is set to "ASTRO 25"),

And

When the radio is model / option capable.