Intercom Computer Systems GmbH

Mainframe as a Key Part of your Digital Transformation Strategy


Virtel Web Access

Thin-client browser-based ibm 3270 terminal emulator

Web Access 3270 emulation

Replacing legacy 3270 terminal emulation with Virtel Web Access provides a welcome relief from the time and cost to support an ever-changing list of client technologies. Virtel extends host applications such as CICS®, IMS, Natural and TSO to thin-client web browsers over secure HTTP/S connections while retaining their familiar screen user interfaces. It is an attractive modernization alternative for aging 3270 terminal emulation (TE) installations.


  • Nothing to install or support outside the host: no client apps and no middle-tier servers
  • Easy deployment: simply point the clients’ browsers to an installation-defined URL
  • Centralized (host-based) installation, management and support
  • None of the complexity, fragility, latency, and scalability issues of middle-tier servers
  • No need to install new client apps to support new client technology
  • Enterprise licensing option eliminates the need to track TN3270 user counts
  • Eliminates need for VPN and session manager


Virtel serves 3270 screens as HTML/JavaScript web pages with 3270 TE ergonomics:
Web Access 3270 emulation


  • Works instantly and automatically with any 3270 TE client regardless of device, OS, or browser:
    • - All version of Windows (including Windows 10)
    • - Linux, AIX, UNIX
    • - Apple products
    • - Mobile devices: tablets (iPad, Android, Goggle, etc), PDAs and smartphones
    • - Internet Explorer, Safari, Firefox, Google, etc.
  • Empowers initiatives where 3270 TE clients are not controlled by the host team such as:
    • - BYOD (Bring Your Own Device)
    • - DR (Disaster Recovery)
    • - VDI (Virtual Device Initiative)
    • - Authorized agent or 3rd party users
  • Features integrated non-American character set conversion for deployments to EU or to countries that use DBCS terminals (Russia, Japan, China, etc.)


  • Supports industry-standard IP security technology: SSL (AT-TLS) encryption, PROXY, SSO, etc
  • Data-less clients: no data exposure in case clients are lost or stolen
  • VPN-less encrypted connections operate inasynchronous disconnected mode, unlike permanently opened TN3270 connections that expose unencrypted data over permanently-opened telnet tunnels
  • HTTP-to-SNA conversion "brakes & redirects" connections behind host firewall
    • - Each exchange is authenticated by unique token and IP address
    • - Incoming data is analyzed for unwanted insertions
  • Custom security features: terminal-transaction-printer control, biometrics (voice, etc) authentication, field-level security filters, and much more


  • Up to 50% savings in licensing fees over top-tier competition
  • Low installation and support costs result in low TCO
  • No middle-tier servers to purchase, configure, monitor, balance, or support
  • No additional licensing fee to support new 3270 TE client technology
  • No need to install new client apps to support new client technology
  • Allows eliminating costly VPN and Session Manager solutions


  • BYOD: allow staff and contractors to use their own devices to access host
  • Mobile access: extends host applications to tablets, Smartphones, and PDAs
  • Apple products: support Mac, iMac and iPad devices as alternatives to traditional PC workstations
  • Globalization: extend host applications to client workstations that use non-American character sets
  • Virtual Desktop: eliminate 3270 TE client apps from desktops
  • 3270 TE modernization: simplify support and reduce TCO


  • 3270 TE in a web browser
  • Serves 3270 screens as web pages with 3270 TE ergonomics
  • Instant deployment: simply point client web browsers to pre-defined URL
  • Centralized (host-based) installation, management, and support
  • Perfect for BYOD, DR, and VDI initiatives
  • More secure than Telnet/TN3270 TE solutions
  • Data-less clients: no corporate data exposure in case clients are lost or stolen
  • Save up to 50% in licensing fees
  • Simple host-centric support results in low TCO and early ROI
  • None of the costs, complexity, latency, and capacity issues associated with middle-tier servers
  • No re-licensing or re-installation to support new 3270 TE client technology

Virtel Web Access datasheet

Virtel Web Access 3270 screen emulator Datasheet

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Obere Wiesen 1

D-85276 Pfaffenhofen

Tel: +49(0)89-74 13 64-0

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