Nextel Direct Talk (not Direct Connect)

[rescuecomm]

Mall Ninja

Of course. Along with a stun gun, OC spray, and a collapsible baton, what else would a good mall ninja need?

Bob

 

[drunyon]

Does anyone know the frequencies/codes used by Nextel Direct Talk?

 

[N_Jay]

Does anyone know the frequencies/codes used by Nextel Direct Talk?

The frequencies are across the 900 MHz ISM band.

I am not sure what you mean by "codes", but I think they are a specifically different set then the similar Motorola 900 MHz digital unlicensed product.

 

[drunyon]

The Direct Talk features gives users the choice of 10 different "Channels" (frequencies) and 15 different "Codes".

I'm just curious exactly what the frequency is for each of the channels. And...like you, I'm curious what the "Codes" actually mean.

 

[N_Jay]

The Direct Talk features gives users the choice of 10 different "Channels" (frequencies) and 15 different "Codes".

I'm just curious exactly what the frequency is for each of the channels. And...like you, I'm curious what the "Codes" actually mean.

I would guess the "channels" are sets of frequencies for the hop sequence.
I would guess that "codes" are codes calculated into the hop sequence.

 

[MTS2000des]

I would guess the "channels" are sets of frequencies for the hop sequence.
I would guess that "codes" are codes calculated into the hop sequence.

The codes are nothing more than talkgroup identifiers, and if you choose private conversation (where you enter the recipient's MTN) other MotoTalk handsets on the same channel/code are "prohibited" from unmuting on your "private" call even if set to "monitor" mode. It might be interesting to see if you programmed a target handset with the duplicate MTN's if you could private call two radios at the same time, since the MTN is what acts as what is essentially the radio's individual ID when it is off network not the SIM ID or handset IMEI.

I'll have to try this and see what happens. I have several iDEN MotoTalk portables laying around, will set the MTN to the same and see if they all unmute on "private mode only".

 

[BigDogg795]

The codes are nothing more than talkgroup identifiers, and if you choose private conversation (where you enter the recipient's MTN) other MotoTalk handsets on the same channel/code are "prohibited" from unmuting on your "private" call even if set to "monitor" mode. It might be interesting to see if you programmed a target handset with the duplicate MTN's if you could private call two radios at the same time, since the MTN is what acts as what is essentially the radio's individual ID when it is off network not the SIM ID or handset IMEI.

I'll have to try this and see what happens. I have several iDEN MotoTalk portables laying around, will set the MTN to the same and see if they all unmute on "private mode only".

Any updates on this?

 

[rescuecomm]

It does work using the Motorola I355 units. I set three units to the same number and keyed one and the other two received the call. I had to select the call each time but perhaps if there was only one in the memory it would default to it.

Bob

 

[avtarsingh]

anybody found a way to get rid of that annoying morse code V dit dit dit dah every time you key up on DT ? looked thru all settings - its annoying as hell and the only thing i do not like about dt
i can silence the beep (thru settings) on direct connect .. but havent found a way on dt

 

[rescuecomm]

If you ever figure that out, please let me know too.

Bob

 

[cdesigns]

anybody found a way to get rid of that annoying morse code V dit dit dit dah every time you key up on DT ? looked thru all settings - its annoying as hell and the only thing i do not like about dt
i can silence the beep (thru settings) on direct connect .. but havent found a way on dt

I have a motorola software that I can change some features and settings, I will look into how to remove the chirp sound each time you press PTT. If I found something I will let you know.

opps I can change setting on the i290 but I need the cable for i355 to check on that.

 

[PCTEK]

Came in late

I know I've come in late, but the DT feature on the Nextel's... is this simplex radio to radio or does it use the Nextel network to carry the DT? I cant imagine decent range from a Nextel cell phone given it's limited power.

 

[cdesigns]

I know I've come in late, but the DT feature on the Nextel's... is this simplex radio to radio or does it use the Nextel network to carry the DT? I cant imagine decent range from a Nextel cell phone given it's limited power.

The phone has Direct Connect and Direct Talk

Direct Connect = using towers as a repeater
Direct Talk = phone to phone just like a FRS radio.

I just tested my i355's between tress, houses and I got a maximum of 1.75 miles of range much better than all my gmrs radios

 

[RayAir]

Is it possible to set up "private only" if the phones have new sims and all it says in "my info" for the line number is "not available"? It does have a direct connect number though. I believe you had to use the phones number for private talk?

Thanks.

 

[JASII]

Hopefully it is okay to resurrect a thread this old. I, too, have several Nextels that I occasionally use in the Direct Talk mode. I may be taking my family on a Caribbean cruise next year. Does anybody have any idea how well Direct Talk might work aboard ship? Will I be able to communicate anywhere on the ship? I realize that they are not very high powered, but perhaps as 900 mHz they may work okay.

 

[rescuecomm]

Ray_Air says:

I have been impressed with a pair of Motorola DTR 550 generation 2 (longer 900MHz whip antennas) radios that I have. I recently took them on a cruise and had full ship coverage aboard the Carnival Sensation. I couldn't get anything close to full ship coverage when I tried using a pair of 4W UHF Motorola Visar's a couple of years ago. So the DTR is great for difficult environments. I have tried them a couple of times- house to car. I got about 1.5Mi. In the open they are probably comparable to 4W UHF.

The Motorola DTR offers more privacy than the TriSquare if you create your own unique 11-digit I.D private channels on the DTR. The DTR is also digital, using VSELP and a 90mS hop rate compared to the TriSquare which uses analog FM with a 400mS hop rate.
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Motorola Systems Saber Net
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The Motorola DTR's have 1 watt output power, same as the Trisquare eXTRS but a better antenna.

Bob

 

[RayAir]

Hopefully it is okay to resurrect a thread this old. I, too, have several Nextels that I occasionally use in the Direct Talk mode. I may be taking my family on a Caribbean cruise next year. Does anybody have any idea how well Direct Talk might work aboard ship? Will I be able to communicate anywhere on the ship? I realize that they are not very high powered, but perhaps as 900 mHz they may work okay.[/QUOTE

They are your best bet on a cruise ship by far.

 

[RayAir]

The Motorola DTR's have 1 watt output power, same as the Trisquare eXTRS but a better antenna.

Bob

"I have tried them a couple of times- house to car. I got about 1.5Mi. In the open they are probably comparable to 4W UHF."

Revision: 4W UHF radios had more range in a suburban setting than the DTR, or Nextel Direct i355. From a second floor location the 4W UHF radio had a little over 3 miles range and the DTR and i355 had about a 1.5-1.6 mi range.

 

[eclipse175]

i also will be going on a cruise soon, any suggestion as to the best communication devices?

 

[drunyon]

Has anyone ever figured out a way to get a Nextel i355 to boot directly into the Direct Talk mode? I'd love to be able to speed up the process and avoid pushing so many buttons to get there.