P25 Trunk individual call, problem (BCD436, 396)

[rochs]

System P25 trunk (BCD 436) and P25 standard trunk for (BCD396)
in an individual call you can hear only one subscriber, and sometimes all.
what is the problem?
I use BCD 436 and BCD 396
If two scanners work, then on the first one you can hear the transmitting subscriber,
and on the second scanner the answer!!!
All control channels installed

 

[ka3aaa]

what else is programmed in the scanners?

I don't understand what you are asking

 

[iMONITOR]

Not sure if scanners designed for the US are compatible in Slovenija.

 

[rochs]

what else is programmed in the scanners?

I don't understand what you are asking

Here so I accept only one defiant(SRC), and sometimes I hear two defiant(SRC & DST)
Only for a private call.
Group call I hear all subscribers, here everything is good

 

[pb_lonny]

Are you talking about an I-Call? If so, they work a bit different to a normal talk group based transmission.

 

[rochs]

Are you talking about an I-Call? If so, they work a bit different to a normal talk group based transmission.

no, no system "p25 trunk"
private conversation, two callers are talking outside the group.
in the group works fine, only the private conversation (individual call) of two subscribers

 

[rochs]

maybe it's in "Band plane"

 

[INDY72]

The picture you show is of an Individual Call AKA an I-Call. This is an select communication directly between 2 radios, and is NOT overheard by the other users of an Talk Group, or anyone else on the system. It depends on whether there is a reply required or just an I-Call used as an announcement page so to speak. Or you may have only caught the end of the transmission, or not have a delay set long enough to hear replies. The Band Plan has nothing to do with this.

 

[rochs]

The picture you show is of an Individual Call AKA an I-Call. This is an select communication directly between 2 radios, and is NOT overheard by the other users of an Talk Group, or anyone else on the system. It depends on whether there is a reply required or just an I-Call used as an announcement page so to speak. Or you may have only caught the end of the transmission, or not have a delay set long enough to hear replies. The Band Plan has nothing to do with this.

Yes you are right, you are talking about "digital threshold level"?

 

[INDY72]

No I am talking about the delay setting for the system in your programming. There is a delay for rescan, a site hold delay etc...

 

[rochs]

No I am talking about the delay setting for the system in your programming. There is a delay for rescan, a site hold delay etc...

well, tell me where these settings in the "Sentinel" or in the scanner?

 

[Ubbe]

It could be that the individuals are on different sites. When person A speaks on site 1 and person B listen on site 2 and your scanner are listening to site1, then you probably only hear when B speaks. That's the case with many digital systems.

/Ubbe

 

[INDY72]

BCDX36HP Sentinel Software Manual
Edit Systems
Hold Time This sets (in seconds) the amount of time the scanner will scan the System before moving on to the next system. All (Unavoided) channels will be scanned at least once regardless of this setting. The scanner moves to the next system after the hold time expires, any current transmission ends, and the channel delay time expires.
0-255 sec.

Channel Options
Delay Sets the number of seconds the scanner should wait after a transmission stops before moving on to the next channel.
-10 -5, 0, 1, 2, 3, 4, 5, 10, or 30 sec.

 

[rochs]

It could be that the individuals are on different sites. When person A speaks on site 1 and person B listen on site 2 and your scanner are listening to site1, then you probably only hear when B speaks. That's the case with many digital systems.

/Ubbe

yes, that's right, checked with two scanners

 

[cg]

I hear a similar operation for years with Private calls in the CT Statewide TRS first on a Motorola Type 2 and now a P25 Phase 2 system. The system only allows private calls between a console and a mobile/portable. I suspect the system is set up for the inbound audio from the subscriber unit to be routed directly to the console. Then the console output would be repeated. I don't know if it is even possible for it to be set up that way but it is the only way I can think that would logically explain hearing only on side of a conversation.

chris

 

[Ubbe]

I don't know if it is even possible for it to be set up that way but it is the only way I can think that would logically explain hearing only on side of a conversation.

Almost all systems using timeslots are set up that way. Why send out voice when there's no one that listens to it, except scanner listeners.

/Ubbe