796/296 P25 programming ?

[Mike Alpha]

Anyone programmed a Uniden 796 or 296 for GRN P25?

I'm looking at the ARC250 program and in the trunk settings for a 796/296 there is no P25 option, only Moto Type 2.

What I'm really wanting to know is if the 796/296 do P25 in Control Channel only mode?

Mike

[rustynswrail]

Anyone programmed a Uniden 796 or 296 for GRN P25?
I'm looking at the ARC250 program and in the trunk settings for a 796/296 there is no P25 option, only Moto Type 2.
What I'm really wanting to know is if the 796/296 do P25 in Control Channel only mode?
Mike

Mike,

I am fairly certain that the 796 cannot do the 9600 baud P25. It can only do 3600. I will of course stand corrected on that.

Russell

[Bigfella237]

According to page 7 of the owners manual (http://www.uniden.com/pdf/BC796Dom.pdf):

• Motorola Astro Digital — for channel control purposes, this type of system operates just
like a Type II system — although the control channel can be a 3600 bps data rate (for
mixed analog/digital systems) or a 9600 bps (for digital-only systems). Pure digital systems
can be implemented under APCO 25 Phase 1 or Phase 2 standards. Your BC796D
is able to decode all unencrypted digitized voice traffic on either mixed mode or digital-only
APCO 25 Phase 1 systems.

Andrew

[Mike Alpha]

Mike,

I am fairly certain that the 796 cannot do the 9600 baud P25. It can only do 3600. I will of course stand corrected on that.

Russell

Russell, my understanding is that the 785/285 became the 796/296 because they added 9600 control channel decode, hence the "96" in the model number.

In the ARC250 software, you can select 785/285/296/796 in the scanner model option, but once you've done that, there is no P25 trunk option.

Looks like bigfella has the answers below - or above

Mike

[Mike Alpha]

According to page 7 of the owners manual (http://www.uniden.com/pdf/BC796Dom.pdf):

• Motorola Astro Digital — for channel control purposes, this type of system operates just
like a Type II system — although the control channel can be a 3600 bps data rate (for
mixed analog/digital systems) or a 9600 bps (for digital-only systems). Pure digital systems
can be implemented under APCO 25 Phase 1 or Phase 2 standards. Your BC796D
is able to decode all unencrypted digitized voice traffic on either mixed mode or digital-only
APCO 25 Phase 1 systems.

Andrew

Thanks Andrew, although that info above was a bit vague, the answer is in the programming info on page 46;

Programming Type2/Digital VHF and UHF Systems
3. Select one of the following trunk types for Motorola Type 2 or digital Systems:
4:TYPE2/P25 UHF
Motorola Type 2 or Digital systems in the UHF (450 – 512 MHz) band
5:TYPE2/P25 VHF
Motorola Type 2 or Digital systems in the VHF (148 – 406 MHz) band
4. Set the Base, Space and Offset settings.

So the ACR250 software version I have does not include the /P25 text in the drop down menu.

It's a shame though the 796 won't do CC only mode. Will be a pain in the bum to program the new voice channels in as the system slowly comes on line.

Mike

[rustynswrail]

Mike,

I am fairly certain that the 796 cannot do the 9600 baud P25. It can only do 3600. I will of course stand corrected on that. Russell

Russell, my understanding is that the 785/285 became the 796/296 because they added 9600 control channel decode, hence the "96" in the model number. In the ARC250 software, you can select 785/285/296/796 in the scanner model option, but once you've done that, there is no P25 trunk option. Looks like bigfella has the answers below - or above Mike

Mike,

You are right. With all the different models that I have had contact with over the last few years, I got lost in the specs.

Russell

[soupbones]

Well you learn something new every day. And here I am , only a month or two ago, telling a towie that his 796 won't do the digital GRN when it comes online fully.

[citabria]

I heard a rumour that most of the agencies on the GRN have purchased DES-OFB/AES-256 encryption with their shiny new P25 radios :S

[Sigint]

I heard a rumour that most of the agencies on the GRN have purchased DES-OFB/AES-256 encryption with their shiny new P25 radios :S

Probably AES, as it would not make much sense to purchase a superseded encryption system for their shiny new radios.

However, I doubt it is 256 bit, as supposedly, even the US Government is not using 256 bit yet.

--
Sigint

[citabria]

256 bit is the only type of AES defined in the P25 standards (TIA.102)

It can't be anything other than AES-256

Makes sense that they have DES for backwards compatibility with older agencies