More effective communication with Voice over IP


Unified Communications (UC) via Voice over IP (VoIP) probably offers the greatest potential to make corporate communication in the information age faster, focused, clearly structured and, therefore, also more cost-effective.


The XCAPI allows you to use your existing CAPI 2.0-compatible application for Unified Messaging (UMS), Automatic Call Distribution (ACD) or Interactive Voice Response (IVR) via Voice over IP. This will enable you to use your telephone and fax functions without conventional hardware such as modems or ISDN cards.



Laurence Buchanan CEO

To do business in a global market increasingly requires partnerships on the other side of the world. We worked with TE-Systems late 2015 with XCAPI for our enterprise fax server connector. We needed a reliable feature rich set of technologies with first class diagnostics and monitoring. BNS evaluated and tested XCAPI late 2015 through to March 2016, we were very pleased with the level of support and product updates to support our specific needs. We finally met with TE-Systems in Germany April 2016, our partnership with TE-Systems is now providing our customers with a solid set of Fax over IP technologies with our award winning enterprise fax server connector for Exchange and Office 365.

Laurence Buchanan CEO, BNS Group Australia

Pure Software Solution

XCAPI is a pure software solution for CAPI 2.0 applications, offering all the performance features of a classic ISDN card without the hardware.


Virtualization in the context of VoIP is only possible with a software solution such as XCAPI. Cluster scenarios can be planned and implemented more easily. Operation and maintenance costs less.

Performance Features

XCAPI is the complete solution for your interface to the VoIP world. It supports numerous IP infrastructure features. Some absent features can be simulated by XCAPI making them available to the application as well.

Compatible with H.323 and SIP

The solution supports the most widely used standards on the market. This means that XCAPI is compatible with H.323 and SIP-compatible terminals and gateways of all manufacturers. In addition, XCAPI uses proprietary features used by most common solutions.


XCAPI is the ideal partner for all areas of application. Between 2 and 500 channels can be used simultaneously. Different codecs or features can be licensed as options.

Fax fallback from T.38 to G.711

Different infrastructures need different confiurations. XCAPI provides a multitude of confiuration options, including for faxing. If a gateway does not support the T.38 protocol, the fax fallback feature switches automatically to G.711 (fax pass through).


Outstanding reliability, stability and availability are the most important qualities that companies require from their communications. XCAPI provides numerous references to meet precisely these demands day in, day out.


With XCAPI, you won‘t run any risk regarding the security of your data transfer. For voice and fax communication XCAPI supports TLS and SRTP, thwarting any attempts of eavesdropping or manipulation.

Open Interfaces

CAPI 2.0 is an open interface and freely available to everyone. The ETSI (European Telecommunications Standards Institute) adopted CAPI 2.0 as standard ETC 300 325 (Profie B). TE-SYSTEMS offers an SDK which provides a simple and fast integration of XCAPI into your own application, including several source code samples.

Performance Features


The listed functions give an idea of the outstanding performance range of XCAPI – take
a look for yourself:




    • SIP


    • H.323


    • QSIG via IP


    • Conferencing


    • Integration of audio ports (optional)


    • Multi controller capability


    • High availability


    • Quality of service


    • DTMF inband/outband


    • V.23 modem


    • Licensing via MAC address


    • WMI / SNMP


    • IPv4, IPv6


    • Channel density 2-500


    • Use in virtual environments


Fax (optional)



    • G.711 (fax pass through)


    • T.38


    • Fax fallback from T.38 to G.711


    • V.34 High Speed Fax


    • Compression to T.4 and T.6


    • Error Correction Mode (ECM)


    • Fax on demand


    • Definition of own headlines


Supplementary Services



    • Hold


    • Message Waiting


    • Call Forwarding


    • Connect


    • Call Divert


    • Caller ID Name


    • Calling Number Identification


    • Calling Line Identification Restriction





    • G.711 (a-Law, μ-Law)


    • G.722 (optional)


    • G.729 (optional)


    • GSM 6.10


    • PCM 16-Bit


    • Transparent


    • MPEG2 (audio only) – optional








    • SRTP (optional)


    • TLS (optional)


    • X.509 (optional)