Mobilecollectors.net

NMT base station solution: Osmocom and Linux

Contributor talk

NMT base station solution: Osmocom and Linux

Postby fmc » 2016 Jul 12, 15:06

It's been awhile but just this week i noticed an interesting project on Github referencing NMT base station, and today i probably made the first proper phone call on NMT service in this country since service shut down! It is software solution for operating A, B and C-Netz, NMT and even AMPS basestation at home. It requires two radios with ability to transmit and receive on the correct frequencies. It is part of "Osmocom" project, Open source mobile communication as it stands for.

https://osmocom.org/projects/osmocom-analog
http://git.osmocom.org/osmocom-analog/

It runs on a Linux based system with two soundcards for speech back and fourth.

All credit goes to Andreas Eversberg and rest of people behind Osmocom for making this happen!

Short test: https://youtu.be/Zjz9EAR9j_k
fmc
 
Posts: 8
Joined: 2015 May 23, 23:23
Location: Norway

Re: NMT base station solution: Osmocom and Linux

Postby bengata » 2016 Aug 06, 15:16

bengata
 
Posts: 9
Joined: 2014 Jun 11, 19:26

Re: NMT base station solution: Osmocom and Linux

Postby bengata » 2016 Aug 10, 14:48

bengata
 
Posts: 9
Joined: 2014 Jun 11, 19:26

Re: NMT base station solution: Osmocom and Linux

Postby fmc » 2016 Aug 10, 23:11

Hi bengata! Glad to see you also got it working! I am wondering, have you been able to test SMS functionality in compatible handset? My main radio is not working anymore and i have also sold computer i have used for software so i haven't been able to do anything with it in a while.
fmc
 
Posts: 8
Joined: 2015 May 23, 23:23
Location: Norway

Re: NMT base station solution: Osmocom and Linux

Postby bengata » 2016 Aug 14, 16:12

Hello .

I tried to test the SMS function. I tried three different phone. Nokia 650, Benefon Dragon, Nokia 450. But I could not send SMS. I changed the numbers from 767 to 9999 and still could not send SMS. The program understands that soil sending sms.but the connection breaks down and SMS not sent .For me the problem is most likely in the transmitter. It has a very low power 10 mW should try a more powerful
bengata
 
Posts: 9
Joined: 2014 Jun 11, 19:26


Re: NMT base station solution: Osmocom and Linux

Postby fmc » 2016 Oct 20, 17:59



Can you give some info on your setup? I am planning to buy new radios for this project, my radio is broken and i am using old TV set for receive audio right now. Ideally i want to buy the cheap Baofeng ones but i have been unable to interface them with my computer as they use voltage for PTT switch.
fmc
 
Posts: 8
Joined: 2015 May 23, 23:23
Location: Norway

Re: NMT base station solution: Osmocom and Linux

Postby bengata » 2016 Oct 22, 12:15

https://www.youtube.com/watch?v=XF_5jcAPpPA

https://www.youtube.com/watch?v=i_GyeAZcebo

You do not need to use voltage for PTT switch. Baofeng It has a function VOX we simply activate it . Then when the input received signal will turn on the transmitter .I use special transmitters which transmit continuously. A receiver for use Motorola P080
bengata
 
Posts: 9
Joined: 2014 Jun 11, 19:26



Return to General talk

Who is online

Users browsing this forum: No registered users and 1 guest

cron

www.mobilecollectors.net - admin@mobilecollectors.net (c) 2013