Posted 1 Days Ago Job ID: 2106422 18 quotes received

Custom 256/512 SMS Gateway Solution

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Fixed Price$2.5k-$5k
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  Send before: June 27, 2025

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Engineering & Architecture Engineering (Mechanical / Chemical / Civil / Electrical) 

Hi Joby,
My name is Gerard, and I work with a company specializing in SMS verification services. We provide hardware infrastructure solutions to businesses that offer online SMS verification by renting real SIM-backed phone numbers.
Currently, we use EJOINTech equipment, specifically:
  • 64-Port GSM Modem (4G LTE) with 256 channels (Model 64-256)
  • 64-Port GSM Modem (4G LTE) with 512 channels (Model 64-512)
To stay competitive, we’re looking to upgrade to a 256-Port (or even 512-Port) GSM Modem with a similar architecture. This would allow us to scale from 64 to 256+ simultaneous SIM connections per device.
Key Details:
  • A 64-Port device consists of 64 GSM modules, each supporting multiple SIM slots:
    • Model 64-256 = 4 SIM slots per port (256 total SIMs)
    • Model 64-512 = 8 SIM slots per port (512 total SIMs)
  • We need a custom 256/512-Port solution to support at least 256 active SIMs per unit (scaling beyond that would be ideal).
Given your expertise, I’d love to explore possibilities:
  1. Building a custom solution (we can send an EJOINTech unit for reference).
  2. Alternative suggestions—open to more cost-effective approaches than EJOINTech’s high pricing.
Would you be available for a quick chat? I’d be happy to provide more details or discuss feasibility.
Looking forward to your thoughts!
Best regards, 
Gerard
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Gerardo J R United States