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Cellular phone line

I'm searching for a device that would accept a sim card and operate on the 4g GSM network. This device would provide a "pots" or "tip and ring" output. It would need to accept incoming DTMF tones from the receiving part and from the connected dialing device. It will also need to provide line voltage or simulation. Ideally it would have an antenna port for an external antenna.

Taidot: Circuit Board Layout, Arduino, Raspberry Pi, Mikrocontroller, Piirilevyn asettelu

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Tietoa työnantajasta:
( 0 arvostelua ) United States

Projektin tunnus: #30832612

7 freelanceria on tarjonnut keskimäärin $1225 tähän työhön

avigupta0061

Best PCB Design Expert at your doorstep! Dear Client, We have lots of experience in Arduino, Raspberry PI, PCB and Circuit design so we able to do this project for you. We can provide a device which can be accept a Lisää

$1250 USD 2 päivässä
(33 arvostelua)
7.2
(33 arvostelua)
5.2
Dovasy

Hi, Dear! I have read your project description in detail. I have rich experience in Arduino, Circuit Board Layout, PCB Layout, Raspberry Pi, Microcontroller, but also in relevant up-to-date technologies and I'm sure th Lisää

$1250 USD 13 päivässä
(4 arvostelua)
4.7
intellisenseIN

Hi there, We are experienced in this field and we have already developed the SIM card based device. We are an experienced team in Embedded Hardware and Firmware development. Kindly spare some time for the interview. Lisää

$1200 USD 20 päivässä
(5 arvostelua)
4.4
roy2873

Hey there, I hope you are doing good. I am ELECTRICAL/ELECTRONICS ENGINEER from India with 4+ years of experience in designing PCBs. I am familiar with various CAD tools including tools preferred by Manufacturers. I a Lisää

$750 USD 5 päivässä
(8 arvostelua)
4.1
ArastuSystems1

We can provide you one device that would accept a sim card and operate on the 4g GSM network. This device would provide a "pots" or "tip and ring" output. It shall accept incoming DTMF tones from the receiving part and Lisää

$1500 USD 21 päivässä
(1 arvostelu)
1.4
AITSoft

Hi there, I have read the brief details on the job listing. You can check my experience, customer feed backs and my portfolio here: https://www.freelancer.com/u/AITSoft I believe its a doable job I have great experienc Lisää

$1500 USD 19 päivässä
(0 arvostelua)
0.0