Telesis PX24 IP PBX Business Phone System
Design and manufacture IP PBX Business Phone System, Switching System, VoIP Gateway, and Signaling Converter  

Telesis WebPhone - SIP Java Client Applet

Telesis WebPhone Icon Large

Hallmarks for Clients

  • Java based client applet (i.e., softphone) loaded onto the browser
  • Works with any Java enabled browser
  • No software or plug-in installation onto the client computer
  • Just a computer with internet connection, a microphone, and a headset
  • No need to worry about updates
  • Simple click to call feature, good especially for non-technical people
  • DWDI (Direct Web Dialing In) service to call analog, digital, or IP users of a Telesis system

Hallmarks for Servers or Telesis System Owners

  • Industry standard SIP (session initiation protocol) technology
  • Applet hosted in the Telesis IP Telephony system
  • Optimization in Telesis systems to provide best audio quality for calls coming from clients
  • Empowering web sites with allowing clients just to click to make calls
  • Customization in Telesis system with different click to call templates
  • Easy and fast deployment on personal or commercial web sites with simple link to the hosting Telesis system
  • Preparing e-mail signatures inviting people to make web calls

Telesis Systems Offering SIP WebPhone Service

  • Telesis Business Phone Systems:
    • PX24N (Telesis Nano) IP PBX SoHo System
    • PX24M Hybrid IP PBX Business Phone System
    • PX24X Hybrid IP PBX Business Phone System
  • Telesis Switching Systems:
    • X1 Large Capacity TDM - IP Telephony Switch
  • Combined VoIP Gateway and Signaling Converters:
    • Stillink 200
    • Stillink 800
    • Stillink 3200
  • Large Capacity IP PBX for Enterprises
    • Stillink 3200

Telesis Systems Host the Java SIP Client Applet and Sends this on Request

Integrated Web Server of the Telesis System Hosts the Java SIP Client Applet


Telesis WebPhone is compatible with all major web browsers such as Google Chrome, Internet Explorer, Mozilla Firefox, Opera, or Safari in Windows, Mac OS, and Linux operating systems.

compatible with Google Chrome web browser compatible with Internet Explorer compatible with Mozilla Firefox web browser compatible with Opera web browser compatible with Safari web browser


RFC 3261 SIP: Session Initiation Protocol.


Telesis WebPhone is a SIP softphone or client applet hosted in Telesis IP PBX, Telesis TDM - IP telephony systems, Stillink access gateways and Stillink signaling converters. The applet can be run from any Java enabled web browser. Since it is a standard Java applet, no software installation is required or no plugin is installed. The applet is just loaded temporarily onto the client`s browser. It can be used wherever is an access to the Internet. A web browser, a microphone, and a headset; sufficient to make calls.

Telesis WebPhone main page screenshot

A Telesis WebPhone page in Telesis System for immediate use 

It is completely an independent application. Telesis WebPhone works with all major browsers such as Google Chrome, Internet Explorer, Mozilla Firefox, Opera, or Safari. The WebPhone uses the Java Runtime Environment (JRE) 6.0 or higher that has been preinstalled on almost every computer for several years. Older computers can be updated free from Java site.

Performance and Optimization

The implemented protocol is the industry standard Session Initiation Protocol. However, Telesis IP Telephony systems, which host the applet, have been optimized in many respects like optimum frame lenghts, advanced echo cancellation, adaptive jitter buffering. Especially, the jitter buffer in Telesis systems is made intelligent and adaptive for the received RTP packets from the client side. Thanks to this, the best audio performance is ensured wherever the call comes from.

Easy Web Site Deployment

Telesis WebPhone feature empowers web sites of Telesis system owners. No need to have a special experience. It is so easy. Telesis system owners may just place a single and simple html link from their personal or commercial web sites to their Telesis systems. Hence, deploying webphone service on a web site takes a few minutes only. But, the result is an attractive web site allowing clients click to make calls. You may click on this link to access Telesis Webphone, which is deployed in this web site and hosted in Telesis IP PBX system in our premises.

Advanced Web Site Deployment

Web site designers may prefer to prepare their own personal or commercial web pages with names and corresponding click to call buttons. Then, click to call buttons may be individually linked to the hosting Telesis system. It is also very easy. A little experience in web design may result in fancy web pages.

Direct Web Dialing In: Calling Analog, Digital or IP Users of a Telesis System

Telesis system may also be enabled for DWDI (Direct Web Dialing In) service.  Thus, any client, who are aware of the number to be accessed, may just edit this number in the address bar of the web browser. This number, which may be any type of user (analog, digital or IP), is called in the Telesis system.

Email Signatures with Web Call Invitation

Telesis system users may add their web call links in their email signatures. Consequently, email receipents may just click on this link to call the sender.

WebPhone Update

Since the Telesis WebPhone is a temporary applet that is loaded from the Telesis system with each session, clients do not need to check any updates. All SIP and other parameters are inserted into the java applet automatically by the hosting Telesis system. Consequently, clients do not have to dial anything or to make any settings. No registration is required. Application is just a click to call one. These are good features, especially for non-technical people.  If there is an updated version available in Xymphony operating firmware of the hosting Telesis system, clients will be automatically using new features (if any) with their next calls. 

Related Readings

We recommend you to visit Telesis Wiki Pages for technical readings.


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