LTR Passport Controller

[NoFear2005]

would there be anyway to disable the Transmit on the radio from the controller?

[pachanga22]

Trident?Should be a RDD input I think?

[LTR]

If you mean you want to disable just the transmit (and not receive) on an individual radio in the field through the PassPort controller, then no. If you want to disable a lost or stolen radio, you just move the user from "Valid" to "Stun" in the controller, then the radio will no longer transmit or receive.

[NoFear2005]

oh i just wanted it to RX the system i guess its not possible then....darn....

[LTR]

I would think that the radio itself could be programmed for transmit disable. I know on Kenwood radios, each talkgroup that is programmed in has a setting for transmit disabled or enabled, but I do not know about the other manufacturers.

[ve3nsv]

Motorola Passport radios can be programmed for disabled transmit on certain talkgroups also although they still have to afiliate or register with the system before they will receive the talkgroup regardless on whether or not it was already being carried on that tower or not.

The controller can be set for stun on certain radio ID's or MINS. This is used mostly for seasonal customers or if somebody hasn't been paying their bills. When the radio tries to register with the system it will show as Disabled.

The owner also has the option to turn on ESN validation. If a radio tries to spoof another radio ID with a different ESN then what is programmed into the Home site for that talkgroup, it also shows disabled but I believe it can also be killed depending on how the controller was programmed.

The controller also has the Kill command which is similar to the inhibit command on a Moto Type II system. Not sure if the radio can be revived by reprogramming or if it has to go to the Depot as I never did see one come into our service shop after it had been killed.

If you are looking to passively monitor your local system with a Passport Radio, it can't be done. Your best bet is to park your scanner on the home channel and hope the system isn't too busy.

Originally Posted by LTR

I would think that the radio itself could be programmed for transmit disable. I know on Kenwood radios, each talkgroup that is programmed in has a setting for transmit disabled or enabled, but I do not know about the other manufacturers.

[slicerwizard]

Originally Posted by ve3nsv

The owner also has the option to turn on ESN validation. If a radio tries to spoof another radio ID with a different ESN then what is programmed into the Home site for that talkgroup, it also shows disabled

Yes, the system will stun the radio with the spoofed MIN as well as the legitimate radio that uses that MIN. So if I want to fsck with your largest customer, all I have to do is program their dispatch radio's MIN into my 1250LS+ and every time I power up the radio, it'll knock the dispatch radio off the air. Great system design, eh?

[ve3nsv]

Hmmmm I didn't know that but nothing would surprise me with /\/\ and Trident.

Originally Posted by slicerwizard

Yes, the system will stun the radio with the spoofed MIN as well as the legitimate radio that uses that MIN. So if I want to fsck with your largest customer, all I have to do is program their dispatch radio's MIN into my 1250LS+ and every time I power up the radio, it'll knock the dispatch radio off the air. Great system design, eh?

[slicerwizard]

Originally Posted by ve3nsv

Hmmmm I didn't know that but nothing would surprise me with /\/\ and Trident.

Same here, but this one falls squarely on Trident's shoulders; they designed the protocol and the stun command just blindly targets the MIN. Any radios that match will go to sleep.

[ve3nsv]

Originally Posted by slicerwizard

Same here, but this one falls squarely on Trident's shoulders; they designed the protocol and the stun command just blindly targets the MIN. Any radios that match will go to sleep.

I never did encounter a CDM (Passport) that had been killed (Not stunned) in the NTS Commander. Could they be revived through reprogramming or did they have to go to the depot?

[slicerwizard]

Originally Posted by ve3nsv

I never did encounter a CDM (Passport) that had been killed (Not stunned) in the NTS Commander. Could they be revived through reprogramming or did they have to go to the depot?

Depot wouldn't go over very well with system owners. It should just take a read/write with the programming software (e.g. PPCPS for Moto gear).

"The PassPort protocol includes the KILL command, which completely disables a radio. Once disabled with the KILL command, only an authorized dealer can restore the radio to service. The extent of disability resulting from the KILL command and the procedure for restoring the radio to service varies from manufacturer to manufacturer. A radio can be KILLed by using NTS Commander to set the status of the MIN record to KILL. Once the status of the MIN record is set to KILL, the KILL command will be sent to the radio the next time it attempts to register."