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Build me an intercom communication system

Looking for an electronic engineering company to create an intercom system using mobile technology (3g~4g). The system should be two way with battery backup for about 4 hours in case of power failure. Over and above the normal two way communication a sms will be sent to different numbers when ever there is call from the system. We should be able to program the numbers to be dialed out and sms to, and change remotely if the need arises.. The system must allow via cables for an external speaker, microphone and button to activate call. There is a 220VAC power [login to view URL] will be enclosed in a reasonably protected case nothing special. The volume of the speaker should be able to be adjusted. The antennae should be external. Your cost should include the supply of two prototypes and all associated costs. The budget price is only for guideline purpose. Prices submitted will be what you are evaluated against. Payment will be made on completion. Please also indicate your lead times from award to protoyype.

Habilidades: Eletrônica, Engenharia Elétrica, Layout PCB, Wireless, Engenharia de Telecomunicações

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Acerca do Empregador:
( 0 comentários ) Johannesburg, South Africa

ID do Projeto: #26804252

6 freelancers estão ofertando em média $950 para esse trabalho

sivom

Hello Sir, I have experience developing devices using 3G GPRS modules to send SMS and make call. Actually normal landline intercom will have a EPABX where the call from an input line will be diverted to other landline Mais

$2000 USD in 60 dias
(10 Comentários)
4.8
HarimohanG

Dear Shourne, I have read and understood your requirements and could do it for you in the least time and utmost superior quality. I have experience in intercom communication system and could design it for you as per y Mais

$2000 USD in 40 dias
(2 Comentários)
4.4
intellisenseIN

Hi, Sorry, we are comfortable with milestone based work. We can surely create an intercom system using mobile technology (3g~4g). Kindly spare 10 minutes for the interview. We can help you in this project as we are a Mais

$700 USD in 30 dias
(3 Comentários)
3.9
niroshanr

Hi friend, I can implement this solution for you with sim800 module (GPRS). Of course I'm highly experienced in PIC and AVR , STM32, cypress PSOC micros in C/C++. And also exposed to VHDL for Altera and Xilinx FPGAs Mais

$250 USD in 14 dias
(1 Comentário)
2.9
SolutionWhiz

Hi, I am interested in assisting you with this task. I am an Electrical Engineer by profession with over 6 years work experience, and I have in possession a master’s degree in this field. My experience evolves around: Mais

$250 USD em 1 dia
(0 Comentários)
0.0
Engineerscolumn

I had been employed by several reputable organizations and respected clients worldwide. The job has enabled me to excel in my professional life as an electrical engineer with 8 years of experience. You will get more th Mais

$500 USD in 4 dias
(0 Comentários)
0.0