Internet Call

Sejong VoIP

For the One World, Sejong provides the internet based call service for all local and long-distance areas at a low cost

What is Sejong VoIP?

It is a service that reduces call charge and enhances work efficiency of corporations by implementing voice call based on internet network instead of existing telephone network and by providing various supplementary service. Recently, its quality and stability has been improved to landline level through the expansion of dedicated line and high-speed internet and a constant development of technology.

Quality Stability (Our Sejong VoIP guarantees stability of call quality.)

Internet phone (VoiP) of Sejong Telecom promises to provide the same level of quality with wire phone. In order to keep our promise, we have 24 hour real-time monitoring operation system to maintain call quality. The company is VoiP communication provider that acquired certification related to VoIP call quality and connection quality by Telecommunications Technology Association (TTA).
(Verification No. TTA-C-N-06-001)

3 big characteristics of Sejong Telecom’s internet phone service

  • Cheaper than anything else
    It is cheaper up to 96% of international call, 85% of long-distance call and 18% of mobile phone. Calls between headquarter and local branches/factories are free.
  • Much more convenient
    Internet phone provides various supplementary service, and can provide customer’s desired function as a separate solution.
  • Definitely stable.
    Sejong Telecom is a VoIP communication provider that acquired certification related to VoIP call quality and connection quality by Telecommunications Technology Association (TTA).
    (Verification No. TTA-C-N-06-001)

How to Use

We inform you how to call depending on means of use.

Call to internet phone Ex) (+82) 070 + 790 + 1234
Calls between Sejong 070 subscribers are free.

  • Step. 01
    070
  • Step. 02
    Phone Number

Call to mobile phone Ex) (+82) 01X + 123 + 4567

  • Step. 01
    Mobile Phone Identification No.
  • Step. 02
    Phone Number

Call to overseas Ex) 008 + 1 + 213 + 4567

  • Step. 01
    008
  • Step. 02
    Country Code
  • Step. 03
    Area Code
  • Step. 04
    Phone Number

Call to Korea Ex) (+82) 2 + 123 + 4567
You should press area code even if it is same area. (Able to set automatic area code on IP phone)

  • Step. 01
    Area Code
  • Step. 02
    Phone Number

Customized Service

We recommend VoiP service that fits you.

  • IP Phone Product
    • Customers who want to use VoiP service at office or company
    • Customers who want to use VoIP phone like a landline without connecting to computer
  • IP-PBX, IP-CENTREX Product
    • Customers who want to use VoiP service at office or company
    • Customers who need keyphone service such as switching or pulling
    • Customers who don’t have PBX or keyphone system currently or who will use it
  • VoIP-Standard Product
    • Customers who want to use VoiP service at office or company
    • Customers who need keyphone service such as switching or pulling

Supplementary Service

Premium Service

Find the most suitable supplementary service for your situation. You may find details of the service when you click on the case.

Entire Service

If you use Sejong Telecom’s VoIP Service, you can enjoy various supplementary services. Click the supplementary service that you want to check out for details.

  • Display of Caller’s Number
    Service that allows the recipient to decide whether or not to answer by showing caller’s number with the bell
  • Voice Mailbox
    Receive and store missed voice message
  • Call Forwarding
    Service that forward incoming calls to subscriber’s number to other registered number
  • Notification at Designated Time (Morning Call)
    Service that sends call signal at designated time and notifies the subscriber of the designated time when the subscriber responds to the call signal
  • Call Waiting
    Service that notifies subscriber who is already on a phone about a new incoming call with an indicator
  • Blocking Call
    Services that do not accept calls during specifically registered hours
  • Multi Number
    Service that provides a registered subscriber an additional call-only number
  • Calling Number Protection Service
    Service which protects the calling number from disclosure
  • Speed Dial
    Service that allows you to register frequently used long number as only 2 digit number
  • Block Unknown Call Service
    When a Caller ID user receives an unknown call because the caller’s number is blocked
  • Prohibition of Call/Receipt
    Provides call/receipt prohibition function and an audio guidance
  • Call holding/waiting/waiting blocking/forwarding
    • Holding : Press Flash key to hold or open call
    • Waiting : Send a specific tone when another call is incoming during a call
    • Forwarding : Forward received call to another phone during a call
  • Call Relay (Call Share)
    Calls to other phones within the group (The number of available phones varies by company)
  • Directory Number
    When a call is incoming to the directory number, forward it to an empty line
  • Remote Office (CENTREX)
    Service that allows to make a call in remote place with phones installed in the office
  • Pulling / Designated number pulling
    Service that allows you to pull an incoming call from group colleagues
  • Simultaneous Call
    Service that makes pre-designated phones to ring simultaneously when receive a basic call (The number of available phones varies by company)
  • Conference Call
    Service that allows multiple subscribers to talk at the same time (Simultaneous capacity varies by company)