Smartzone Question

[firemedic2150]

I have discovered a two site UHF smartzone system with different connect tones for each zone, but all of the other system information is the same. I did not know if I had an error or if this was possible, anyone ever seen this before?

Mark Mc.

 

[jim202]

It is possible that is the way it was set up. If there was enough coverage overlap, this may have been done to allow selective tower selection by the operator of the radio.

Jim

I have discovered a two site UHF smartzone system with different connect tones for each zone, but all of the other system information is the same. I did not know if I had an error or if this was possible, anyone ever seen this before?

Mark Mc.

 

[mikewazowski]

I have discovered a two site UHF smartzone system with different connect tones for each zone, but all of the other system information is the same. I did not know if I had an error or if this was possible, anyone ever seen this before?
Mark Mc.

I believe that Smartzone sites broadcast the connect tone to the radios so any connect tone can be used. Generally sites in one geographic area will use the same connect tone to reduce the chance of a radio possibly getting into another site.

Other systems use a single connect tone and the radio is preprogrammed with the same connect tone.

 

[mikewazowski]

It is possible that is the way it was set up. If there was enough coverage overlap, this may have been done to allow selective tower selection by the operator of the radio.

Jim

Radio users cannot select connect tones manually. Connect tones are programmed into the radios when they are first setup.

 

[N4DES]

It could be programmed with 2 trunking systems with the only difference being the connect tone and would require the radio user to manually change channels. This doesn't sound logical though and takes away the SmartZone concept which is supposed to be automatic.

 

[mikewazowski]

If the radio is programmed as Smartzone, it will ignore whatever is in it's Connect Tone field.

 

[keepyoucool]

In the Zone

I monitor an 800Mhz SmartZone system, so when I saw the discussion about this connect tone, and it seemed no one knew what it was really for I did some searching. From what I understood after my reading, knowing the connect tone for a system is pointless for scanning. I'm just going to go for what I read here and try to explain what I understand.

What it's for: The connect tone "known" by the mobile. When the PTT button is pressed, all that fun voice channel assignment goes on, mobile is sent it's "assignment" over the control channel, the repeater then sends the connect tone out on the voice channel that the mobile's TG was assigned to for the transmission, to communicate to the mobile that it is assigned & monitoring the correct talk channel.

About: A system can have up to 8 connect tones. These are only for analog voice. When the mobile is powered on, travels from ZoneA to ZoneB, looses a control channel it will scan for a control channel and system ID and affiliate with a site, sending the radio ID,TG ID, other info to the system, system acknowledges the mobile by sending the same information back, ALONG with the system connect tone information.

It’s not so hard to understand if you think about how the system operates and the logic of what it has to do. I hope it helped!

 

[N4DES]

The subscriber also transmits out the connect tone and if the station doesn't see the correct one it will drop the call. It works along the same guidelines as PL/DPL except there is an extra step before it, that being the channel grant by the controller.

Connect tone is also utilized to keeping the station quiet if the system is set for Message Trunking and there is a repeater hang-time during conversations.

 

[keepyoucool]

can you explain that in a little more detail
Thanks!

 

[WayneH]

can you explain that in a little more detail
Thanks!

http://www.thebriarpatch.org/trunking/callprocess.html

-Wayne

 

[keepyoucool]

I didn't follow how that related to what you were talking about stations and message trunking but I personally don't need to know about any of it, I understand how it works. I do thank you for the link though, I got to read up on some things that I didn't have as much detail to before.

 

[WayneH]

I didn't follow how that related to what you were talking about stations and message trunking but I personally don't need to know about any of it, I understand how it works. I do thank you for the link though, I got to read up on some things that I didn't have as much detail to before.

You ought to try quoting the specific reply you were replying to. It helps others to answer you correctly.

-Wayne