i system co., ltd.

i system co., ltd. (Korean: ㈜아이씨스템) is a South Korean business-to-business telecommunications partner of KT, headquartered in Seoul. The company operates as a KT Official Business Partner, meaning it is registered with KT headquarters and acts as an authorized channel for KT's corporate connectivity and telephony services. Rather than operating its own network, it sells, designs, installs and maintains KT enterprise products for small and medium-sized offices, public institutions and other business customers. The company's commercial activity is organized around KT's enterprise portfolio. Its website, kt-bizinternet.com, presents itself as a comparison and application hub for KT corporate internet, dedicated lines and business telephony. The product set it handles includes KT OfficeNet for offices of roughly 3 to 50 people, KT GiGA Office dedicated lines with guaranteed bandwidth from 100M to 10G and fixed IP blocks, KT Flexline SD-WAN linking headquarters and branch offices with integrated UTM security, KT KORNET premium dedicated lines for finance and IDC-grade use, KT GiGA office N cloud NaaS-style bandwidth-on-demand lines, domestic dedicated lines for point-to-point branch connections, and bid-oriented domestic dedicated line forms for public and institutional tenders. On the telephony side it covers KT Centrex cloud PBX, nationwide representative numbers such as 1588, 1644 and 1577, and KT call manager services. A distinctive feature of the business is its service layer beyond simple resale. The site offers an AI-based line recommendation tool that asks about industry, headcount and budget and returns ranked recommendations among OfficeNet, GiGA Office, Flexline and KORNET; a Cloudflare CDN-based line performance diagnostic that measures download, upload and response time; on-site measurement-based quotations that factor in floor area, number of terminals and building structure; and one-to-one consulting by dedicated consultants. The company also states that it holds an information and communications construction business license (No. 201455) and that it was founded in 2011, giving it more than a decade of operating history. It presents itself as handling design, installation and maintenance directly, and it maintains a library of KT official application forms — including the standard KT enterprise service application, OfficeNet, GiGA Office, Flexline, KORNET, Centrex, representative number and UTM security forms, plus delegation letters for acting on a customer's behalf — which it says are managed against KT's official form archive. As a registered KT partner, i system co., ltd. occupies the channel and systems-integration layer of the Korean enterprise telecom market rather than the network-operator layer. Its positioning is that of a one-stop corporate communications partner: consultation, line recommendation, quotation, installation and ongoing maintenance. Its customer base is primarily Korean businesses and institutions seeking KT-branded connectivity and telephony, and its main contact channel is a dedicated consultation phone line and online application process.

i system co., ltd. (Korean: ㈜아이씨스템) is a South Korean B2B telecommunications company headquartered in Seoul. According to its own website, the company was founded in 2011 and has operated for more than a decade as a KT-registered business partner. It holds an information and communications construction business license, No. 201455, which allows it to carry out telecom construction work in Korea. The company built its business around the enterprise portfolio of KT, Korea's incumbent telecommunications operator. As a KT Official Business Partner, it is registered with KT headquarters and authorized to sell, design, install and maintain KT corporate services. Its website, kt-bizinternet.com, functions as both a marketing and application channel, presenting KT's enterprise internet, dedicated line and business telephony products side by side and offering downloadable KT official application forms. Over time the company expanded from basic corporate internet toward higher-value connectivity and security offerings. Its current catalog spans KT OfficeNet for small and mid-sized offices, KT GiGA Office dedicated lines with guaranteed bandwidth and fixed IP blocks, KT Flexline SD-WAN for headquarters-to-branch connectivity with integrated UTM security, KT KORNET premium dedicated lines positioned for finance and IDC-grade use, KT GiGA office N cloud NaaS-style bandwidth-on-demand lines, and domestic dedicated lines for point-to-point branch connections. On the telephony side it handles KT Centrex cloud PBX, nationwide representative numbers and KT call manager services. The company has also added a digital service layer to differentiate itself from pure resellers. Its site offers an AI-based line recommendation tool that takes industry, headcount and budget as inputs and returns ranked recommendations among OfficeNet, GiGA Office, Flexline and KORNET; a Cloudflare CDN-based line performance diagnostic that measures download, upload and response time; on-site measurement-based quotations; and one-to-one consulting by dedicated consultants. It states that it manages its form library against KT's official form archive and that it handles design, installation and maintenance directly rather than outsourcing. As of the available evidence, the company remains active and privately held, with no public listing indicated. Its identity is closely tied to KT: it presents itself as a KT official partner rather than as an independent network operator, and its brand is effectively a channel and systems-integration brand within the Korean enterprise telecom market.

• 2011

  Company founded in South Korea.

• Registered as a KT Official Business Partner with KT headquarters.

• Obtained information and communications construction business license No. 201455.

KT Official Business Partner providing one-stop design, installation and maintenance of KT enterprise internet, dedicated lines and business telephony for Korean businesses and institutions.

• KT OfficeNet

  Corporate internet for offices of roughly 3 to 50 people, with PC-unlimited and fixed IP options.

• KT GiGA Office

  Guaranteed dedicated line from 100M to 10G with 8 to 128 fixed IP addresses.

• KT Flexline

  SD-WAN connecting headquarters and branches with integrated UTM security.

• KT KORNET

  Premium dedicated line on KT's enterprise network, positioned for finance and IDC-grade use.

• KT GiGA office N

  Cloud NaaS-style line with selectable bandwidth.

• KT domestic dedicated line

  Point-to-point 1:1 connection between branches with dedicated bandwidth per customer.

• KT Centrex

  Cloud PBX business telephony with extension, hunt, IVR and recording features.

• KT nationwide representative number

  Representative numbers such as 1588, 1644 and 1577.

• KT call manager

  Integrated management of calls, extensions and recording.

• KT UTM security

  Enterprise firewall and UTM rental.

1. 1KT 기업인터넷 가입 — 사무실 오피스넷·전용회선 비교 | 무료상담kt-bizinternet.com
2. 2i system co., ltd. — Wikidatawikidata.org