Radio Inhibiting????
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- themedic66
- Posts: 151
- Joined: Thu Mar 01, 2007 12:09 am
Radio Inhibiting????
Hello all,
According to my knowledge, radios can only be inhibited on a Digital P25 or trunked system right? Well from what I read from this post on radio reference, a radio even on an analog or conventional system/frequency can be inhibited. Is this true?? And if so, how so??
Here's the link to the post:
http://www.radioreference.com/forums/sh ... ht=inhibit
*Any insight on this would be greatly appreciated!
According to my knowledge, radios can only be inhibited on a Digital P25 or trunked system right? Well from what I read from this post on radio reference, a radio even on an analog or conventional system/frequency can be inhibited. Is this true?? And if so, how so??
Here's the link to the post:
http://www.radioreference.com/forums/sh ... ht=inhibit
*Any insight on this would be greatly appreciated!
"It's all in a days' work"--LAPD/LAFD
Re: Radio Inhibiting????
In a simple answer...YES!
Radios conventional analog channels can be inhibitted as well as trunking radios.
The post over at RR is correct.......
Radios conventional analog channels can be inhibitted as well as trunking radios.
The post over at RR is correct.......
Scott B.
"Never argue with seven men when you are carrying a six shooter..."
"Never argue with seven men when you are carrying a six shooter..."
- PhillyPhoto
- was LuiePL
- Posts: 661
- Joined: Thu Oct 14, 2004 8:09 am
- What radios do you own?: XTS5000, APX2000
Re: Radio Inhibiting????
Yup. All it takes is a couple check boxes. Although, why anyone would check them off to begin (short of being the system admin) with is beyond me...
- PhillyPhoto
- was LuiePL
- Posts: 661
- Joined: Thu Oct 14, 2004 8:09 am
- What radios do you own?: XTS5000, APX2000
Re: Radio Inhibiting????
In the MDC system setup, there's a box for "Radio Inhibit". The CPS help describes this as:
Anyone know what the procedure for resurrecting one of these inhibited radios is? Is it the same as trunked systems, where the inhibiting console is required?
So, if you have that box checked in the MDC system, and the MDC system on a channel that actually uses it, there's a possibility of you're radio being inhibited.Enables the radio to receive a remote Inhibit signal while operating on the current MDC Signaling System. This inhibit signal is a shutdown command sent from the dispatcher unit. Upon receipt of this command, the radio transmits a quick acknowledgement to the dispatch equipment. The radio then goes into a dormant state during which the receiver audio is muted and the transmit audio path is blocked. While inhibited all radio-user controls are rendered inoperative; Scan mode is stopped on the operating mode/channel which received the command, and all Radio LED’s are turned off.
Anyone know what the procedure for resurrecting one of these inhibited radios is? Is it the same as trunked systems, where the inhibiting console is required?
Re: Radio Inhibiting????
When inhibited by an MDC inhibit command "4Ah", it goes into a state called ROS-Idle. In essence, the radio can be turned on, and it will be receiving on the selected channel, but it will pass no audio, will block any transmit command, and will display nothing on the display or LEDs.
The radio can be restored by sending it, over the selected channel, the MDC command "5Ah". This can be done by any installation capable of sending advanced MDC commands; it need not be the same as the one that sent the inhibit command.
As a prior reply indicates, there is no earthly reason to enable "Radio Inhibit" in a single, privately-owned radio. This feature is for fleet operators: it prevents someone from using a purloined radio to transmit interference over the channel and it tends to eliminate the market for stolen radios. Most sophisticated PDs and FDs implement the feature.
The radio can be restored by sending it, over the selected channel, the MDC command "5Ah". This can be done by any installation capable of sending advanced MDC commands; it need not be the same as the one that sent the inhibit command.
As a prior reply indicates, there is no earthly reason to enable "Radio Inhibit" in a single, privately-owned radio. This feature is for fleet operators: it prevents someone from using a purloined radio to transmit interference over the channel and it tends to eliminate the market for stolen radios. Most sophisticated PDs and FDs implement the feature.
Re: Radio Inhibiting????
What device is available to provide these advanced MDC commands and do you have any other info about these 4Ah and 5Ah commands, data? etc.
Re: Radio Inhibiting????
Without purporting to offer a complete list, certain Motorola C200 tone remote controls and properly optioned and programmed Cimarron C Plus III ANI decoder/encoders.
Re: Radio Inhibiting????
Kenwood also offers this via DTMF. It is very common.
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- fogster
- Posts: 386
- Joined: Sun Nov 06, 2005 10:38 am
- What radios do you own?: XTS2500/5000, XPR7550/5550
Re: Radio Inhibiting????
This scares me greatly. What stops someone in, say, organized crime (or terrorists) from building up a list of MDC IDs on the local public safety department, buying a console on eBay, and then sending inhibit commands to all the IDs right before, say, their bank heist? It seems unlikely to me that even the best of dispatchers would realize what was going on, and even if they did, it would just be a battle to see who could send the commands faster?RKG wrote:Most sophisticated PDs and FDs implement the feature.
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Re: Radio Inhibiting????
Lets just hope they don't have any good radio techs on there payroll...
- HLA
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Re: Radio Inhibiting????
i've discussed this with many pd's and fd's and they concider it along the same lines as they don't see the need to have any type of security at the repeater sites where someone could just simply cut the antennae feed or damage whatever they want or no security at water treatment plants so anyone could drive right up and throw something in. from what i see from the that have to take care of the budgets, they see things like this as corrective instead of preventative. they will look into it after it happens. and not just happen somewhere else in the country, they won't worry about it until it happens to them. but back to being able to remotely shut down radios you get alot of different answers from departments on what they want to do with that option. some like it and use it how it was intended to be used but that makes them vulnerable to sabotage. others just disable that and deal with stolen radios or unauthorized use in their own ways. myself i think it's a great feature but needs to be updated, it needs to be permanently set from the factory so you can't just shut it off and it needs to have a individual code along with the individual radio id that either the factory can send out to disable radios or that only the chief or executive has access to.
HLA
I never check PM's so don't bother, just email me.
I won't reply to a hotmail, gmail, aol or any other generic free address, if you want me to reply use a real address.
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I never check PM's so don't bother, just email me.
I won't reply to a hotmail, gmail, aol or any other generic free address, if you want me to reply use a real address.
STOP ASKING ME FOR SOFTWARE OR FIRMWARE, I JUST FORWARD ALL OF THE REQUESTS TO THE MODERATORS
Re: Radio Inhibiting????
Nothing. Like most things in life, inhibit capability is a double edged sword.fogster wrote:What stops someone in, say, organized crime (or terrorists) from building up a list of MDC IDs on the local public safety department, buying a console on eBay, and then sending inhibit commands to all the IDs right before, say, their bank heist?
FWIW, you can inhibit with certain high end MDC1200-capable Icom portables nowadays.
- fogster
- Posts: 386
- Joined: Sun Nov 06, 2005 10:38 am
- What radios do you own?: XTS2500/5000, XPR7550/5550
Re: Radio Inhibiting????
Do you mean you can also inhibit certain high-end Icom radios, or you can send inhibit commands from certain Icom radios?mr.syntrx wrote:FWIW, you can inhibit with certain high end MDC1200-capable Icom portables nowadays.
Re: Radio Inhibiting????
Both, actually.
The capabilities of their radios are described here:
http://www.icom.co.jp/world/products/pdf/MDC_1200.pdf
The capabilities of their radios are described here:
http://www.icom.co.jp/world/products/pdf/MDC_1200.pdf
Re: Radio Inhibiting????
For the Pro (Waris) CPS are these check boxes exactly to enable/disable a radio from being inhibited remotely? Where would you look for this if its available in the DOS based programs (HT1000, GP/GM300, Maxtrac, etc. - I know there's no check boxes in DOS of course)LuiePL wrote:Yup. All it takes is a couple check boxes. Although, why anyone would check them off to begin (short of being the system admin) with is beyond me...
Re: Radio Inhibiting????
I typed too fast - I meant where in the CPS do you find these check boxes - thanks.
- Wicho
- Batboard $upporter
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Re: Radio Inhibiting????
I'm probably wrong, but I seem to remember reading somewhere you can do this with an HT1550 as well. I'm sure I'll be corrected shortly.
mr.syntrx wrote: FWIW, you can inhibit with certain high end MDC1200-capable Icom portables nowadays.
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Re: Radio Inhibiting????
On a related note, Tait TP9100/TM9100 series radios can send conventional P25 stun messages, but that functionality is only available with a heavily restricted feature option.