Using MTP850 Fug as Modem in DM

[roman79]

Hello,

i have two MTP850 Fug, which i want to use as modem transfering AT commands. Unfortunately i can use them only in the Direct Modem.

In the TETRA Terminals Product Information Manual is given:

1. Connect the data cable to the terminal’s data port.
2. Connect the other end of the data cable to the computer.
3. Power up the terminal
4. From the terminal’s menu, select Setup > Data Setup > Voice and Data (or Data) mode option

The problem is that i can't select Setup>Data Setup > Voice and Data while the device using the Direct Mode: an error message : Service is limited appears.

Does anyone have experince using the devices as modems in the Direct Mode?

Thanks

Roman

 

[Raccon]

AT commands are normally used for controlling the TETRA terminal that is connected to the PC, i.e. to set up a data call, change the talkgroup or volume etc.

I am also not aware of any TETRA terminal in the market that can provide packet switched data in DMO and the Motorola MTP850 does not support it for sure.
When you read something about "Data" and DMO in the sales brochures it means SDS/Status messaging. For packet data you need to have the TETRA infrastructure to support it.

PS: DMO = Direct Mode Operation ("walkie-talkie mode"), not 'Direct Modem'!

 

[roman79]

Thanks for your reply.

My intention is to use SDS transfering short Messages, (which can be predefined status messages), from one Terminal to another one. Both Terminal should be connected to a PC, one sending the SDS Message and one receiving it. The received status message should be processed by a Java program (or something like that)

With the AT commands I want to instruct the sending terminal to send a Status Messge. I've read that with Sepura devices this is possible, and I'm pretty sure, that with the MTP850 FUG it is possible.

So does anyone tried this?