bezking
Member
Well, now that I've got your attention, please read this entire post. :roll:
What are talk permit tones?
Talk Permit Tones are the three quick beeps (that sound like a "chirp") that Motorola radios seem to be famous for playing when a radio user keys up.
Why are they there? What are they for?
Talk Permit Tones are usually only encountered when a radio is being used on a trunked system. When the radio user presses the PTT button, the radio must ask the system for a frequency on which to transmit (it is asking for something called a "channel grant"). When this request has been properly acknowledged, the radio will sound the talk permit tones to tell the user that it is ready to transmit his or her message over the TRS. If, instead of the "chirp," the radio user hears a low-pitched, continuous "bonk," it means that the system has not assigned the channel, and the user may not transmit at this time.
How can I get my radio to play Talk Permit Tones on a conventional personality?
Basically, you can't. When not on a TRS, there is no need for a channel grant, so there is no reason at all to play talk permit tones. After all, the only reason TPTs exist at all is to tell the radio user that the system is ready to receive the transmission. If you're not on a trunked system, there is no need to ask the system for permission to transmit, so there's concept of being "permitted" to transmit.
But some people made it work! How did they do it?
There are three ways in which people have simulated or tricked their radios into giving Talk Permit Tones.
Please don't start any more threads asking how to apply Talk Permit Tones to conventional frequencies - as you've just read, it's really not possible at this time without special tricks that may or may not be removed from future firmware releases.
Thanks!
What are talk permit tones?
Talk Permit Tones are the three quick beeps (that sound like a "chirp") that Motorola radios seem to be famous for playing when a radio user keys up.
Why are they there? What are they for?
Talk Permit Tones are usually only encountered when a radio is being used on a trunked system. When the radio user presses the PTT button, the radio must ask the system for a frequency on which to transmit (it is asking for something called a "channel grant"). When this request has been properly acknowledged, the radio will sound the talk permit tones to tell the user that it is ready to transmit his or her message over the TRS. If, instead of the "chirp," the radio user hears a low-pitched, continuous "bonk," it means that the system has not assigned the channel, and the user may not transmit at this time.
How can I get my radio to play Talk Permit Tones on a conventional personality?
Basically, you can't. When not on a TRS, there is no need for a channel grant, so there is no reason at all to play talk permit tones. After all, the only reason TPTs exist at all is to tell the radio user that the system is ready to receive the transmission. If you're not on a trunked system, there is no need to ask the system for permission to transmit, so there's concept of being "permitted" to transmit.
But some people made it work! How did they do it?
There are three ways in which people have simulated or tricked their radios into giving Talk Permit Tones.
- The HT1000 Method: In this method, which only works on the HT1000, the radio is set up to play DTMF tones upon transmit. The frequency and duration of these tones are set up such that it sounds like the radio is giving talk permit tones. This method is inadvisable because it causes the tone to be transmitted over the air, which will become annoying to whoever else is on the frequency, especially if you're using Amateur Radio. In the real world (on a TRS), the tones are not transmitted over the air - you've never heard them on your scanner, right?
- The DVRS Method: This method only applies if the user is going to be using a Quantar P25 conventional repeater. In this method, the radio is tricked into thinking the repeater is really a Digital Vehicular Repeater System (DVRS), which it's not. When the radio is operating on a DVRS, it can play talk permit tones to tell the radio user that the DVRS is ready to receive communications. This method doesn't work if you are using an analog repeater or on simplex.
- mikegilbert's Method: Requires the radio to have the Front-Panel Programming (FPP) option. Enable the DVRS option then click the "TA when no DVRS comms" tab, program the radio, and then set the personality via FPP to analog.
Please don't start any more threads asking how to apply Talk Permit Tones to conventional frequencies - as you've just read, it's really not possible at this time without special tricks that may or may not be removed from future firmware releases.
Thanks!
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