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    • 0932 567 774 – 0904 007 517
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Service providing switchboard numbers

Tedev specializes in providing fixed and mobile numbers and switchboard services

Switchboard service number 1900/1800

The hotline service switchboard number 1800, 1900 is a national-level number in Vietnam. All numbers provided by Tedev are supported with modern VoIP technology – Voice over Internet Protocol, meaning Voice over Internet Protocol. IP, is a technology for transmitting human voice (voice) over a computer network using the TCP/IP protocol suite. Uses IP data packets (on LAN, WAN, Internet) with the information transmitted as encoding of audio.

Solution consulting

For solution advice, please contact Tedev hotline: 0932 567 774 – 0904 007 517

Liên hệ

About Us

TEDEV, with the mission of continuous development, we focus on research activities, and above all, constantly train excellent experts and technicians.

We have the best personnel in Vietnam and possess expert certificates such as CCIE, JNCIE, JNCIP-SP….to ensure the best service to our customers. In addition, we always try to test and apply the best and most outstanding technologies to keep up with the trends of the times and meet the increasing demand for quality of our customers.

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Copyright 2025 © TeDev Corp.
  • English English
    • Tiếng Việt Tiếng Việt
    • English English
  • Why choosing TeDev
    • Reliable quality
    • Accompany customers
    • Team of senior engineers
  • AREA OF OPERATION
    • Solutions
      • IoT Solutions
      • TeDev Solutions
    • Services
      • Network administrator
      • Information security management
      • Switchboard number service
    • Brand Products
      • Tp-Link Archer C64
  • Partners & Customers
    • Partners
    • Customers
  • Discuss With Tedev
    • About Technology
    • About TeDev
  • Policy and privacy