precoislen
Member
Does an Motorola trunking system, say an Smart-Zone system do private calls between user radios, similair to I-Call on an EDACS system?
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Motorola Trunking System and Private Calls
- Thread starter precoislen
- Start date
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AZScanner
Member
precoislen said:
Yes, they can. The BC780, 250D, 785D, 296D and 796D can all track I-Calls on a motorola TRS.
-AZ
Yes they do.
I was a user of a Motorola Type II system in High Point, NC for several years starting in the late 80's and we had radio-to radio "private call".
The funny thing about the Motorola system was that the "private call" function operated in conventional mode not trucking. When using "private call" it dedicated one repeater for the duration of the call in stead of trunking the call. This often lead to "busy signals" when too many people used the "private call" function at once. In fact, it got so bad sometimes taht the radio shop had an SOP to disable the function during major incidents such as thunderstorms, ice storms or major fires because during these incdents the system wounld be alraedy be heavily loaded with police, fire and electric crews and "private call" interfered with communication.
For scanner listeners the advantage was that private calls were easly listened to in 800 MHz conventional mode
...Not so "private" after all. And believe me the citizens were listening....more that one person got in trouble for saying inappropriate things on the radio.
I was a user of a Motorola Type II system in High Point, NC for several years starting in the late 80's and we had radio-to radio "private call".
The funny thing about the Motorola system was that the "private call" function operated in conventional mode not trucking. When using "private call" it dedicated one repeater for the duration of the call in stead of trunking the call. This often lead to "busy signals" when too many people used the "private call" function at once. In fact, it got so bad sometimes taht the radio shop had an SOP to disable the function during major incidents such as thunderstorms, ice storms or major fires because during these incdents the system wounld be alraedy be heavily loaded with police, fire and electric crews and "private call" interfered with communication.
For scanner listeners the advantage was that private calls were easly listened to in 800 MHz conventional mode
...Not so "private" after all. And believe me the citizens were listening....more that one person got in trouble for saying inappropriate things on the radio.
Yep Private Call is available on most Motorola TRS's ... some are set up to go conventional and a few trunk,.. but do it with a special TG system that does not show up on most of the Radio Shack Trunking Scanners. Not sure if the PRO-96 will do PC/IC or not,.. the Unidens as listed above will. Remeber don't confuse talk around with private call,... on Motorola you can do both,... talk around goes conventional and is usually not sent through the repeater, where as pc's do go through the repeater. Have seen both kinds of pc in use,.. the conventional,.. which is a poor choice as was stated in another post ties up the repeaters,....and the specail tg, which is much more effecient. Does anyone know if the Unidens track the PC vias conventional method as well as the special TG method? Also a quick query,... When phone patch is active,... will the new trunkers track these?
mlevin
Member
The new Unidens won't track the private calls for the conventional method. However they will track private calls using the trunking system. The radio shows the TG as the two individual radio IDs flashing back and forth. Also, the Unidens will track a phone patch as an private call. The radio displays the the radio ID of the unit making the phone call.
precoislen
Member
Appreciate the responses on this. I got the answer to what I needed.
franco
Member
- Joined
- Jul 17, 2004
- Messages
- 3
I'm glad you got some responses, but the information they provided you is incorrect. There is no "conventional" type of trunking private call. A trunked private call is only trunked. A conventional "selective call" is only conventional. There is no type of trunked private call that hands off to a conventional channel.
AZScanner said:
Just in case the original person asking is trying to listen to Private Calls on a P25 9600, there's no scanner at this time that can do it on those systems.
N
N_Jay
Guest
franco said:
I'm entertained by such indepth explainations of a feature that does not exist. :twisted:
CoffeeDrinker
Member
- Joined
- Jun 11, 2003
- Messages
- 52
Private calls are not PTT-ID.
On Motorola TYPE-II systems, private calls are not PTT-ID. During a private call, the control channel lists the IDs of the two radios involved. If the radios talk back and forth to each other without the call actually dropping (hang time does not expire), the IDs on the control channel do not switch or in any way indicate which radio of the two, is currently talking. If the call drops and then starts again, the IDs might switch, but then that is a new call.
This is in contrast to talkgroup calls where the control channel always indicates the ID of the radio talking. (In a PTT-ID system.)
This is just the way private calls work. It is certainly a "trunked" call. Its just the way it works. Nothing more, nothing less.
On Motorola TYPE-II systems, private calls are not PTT-ID. During a private call, the control channel lists the IDs of the two radios involved. If the radios talk back and forth to each other without the call actually dropping (hang time does not expire), the IDs on the control channel do not switch or in any way indicate which radio of the two, is currently talking. If the call drops and then starts again, the IDs might switch, but then that is a new call.
This is in contrast to talkgroup calls where the control channel always indicates the ID of the radio talking. (In a PTT-ID system.)
This is just the way private calls work. It is certainly a "trunked" call. Its just the way it works. Nothing more, nothing less.
dynamitedjs
Member
kikito said:
Kikito, why won't it track on 9600? One of the local pd's here have 3600 P25 moto Type 2 and I can hear those. I don' see anywhere in the 296 manual that says otherwise.....about the 9600 systems.
dynamitedjs said:
Because I have confirmed it personally on the system in my area and so has many people with 9600 systems including Michigan. Hopefully it'll be an added feature on the next generation of digital trunktrackers.
As we speak, I'm monitoring a 9600 system with Pro96Com and it shows the Private Calls on the screen while my BC296D didn't track them.
dynamitedjs
Member
well I'm glad there are no 9600 systems in my area....I calls are very interesting.
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