With AnyDevice, any phone can be integrated into the communications infrastructure - in line with the concept of Bring Your Own Device (BYOD). This makes it possible for employees to use not only office phones, but also private or business cell phones. They make calls in the home office or at the customer site. A significant part of the CTI service spectrum is available via the end devices without changing the operation of the software. The XPhone Connect system ensures a clear separation between private costs and company costs. Employees can decide for themselves where they can best be reached: When they leave the office, they can switch to their mobile device with a single click and answer all incoming calls directly on their cell phone. Once at home, AnyDevice can just as easily be switched to the home office connection. Any phone accessible via the phone system or any selectable phone number can be stored in XPhone Connect as a separate device. If a call is started via a PC, the set device is called by XPhone Connect. If the employee answers the call there, the connection to the desired party is established. The connection is maintained via the own company and thus enables further telephony functions (see incoming calls and outgoing calls).


Computer Telephony Integration, also known as Computer Telephony Integration or CTI, is a general term for any technology that enables the integration and coordination of interactions via telephone and computer. The term is primarily used to describe desktop-based interaction that provides greater efficiency to users.

XPhone Connect Server can be connected to many different PBXs via CTI interfaces (CSTA/TAPI). Depending on the telephone system, the following CTI features can be used with the connected telephones:

  • Dial, answer, hang up, reject

  • Consultation, call waiting, conference

  • Consultation then transfer

  • Connect, Forward

  • Call waiting/second call

  • Configure call forwarding

CTI services

These are the Windows services, components and processes that are responsible for the CTI features on the XPhone Server.


XPhone Connect Federation connects users of XPhone Connect Server with external contacts who use a SIP federation capable system such as Microsoft Teams or XPhone Connect. The presence display of the respective contact is exchanged between users of these systems, and the contacts of the federating systems can also use instant messaging for the exchange of messages (1:1 chat, no attachments such as images). Administrative settings control whether presence information is transmitted externally with or without the user’ s prior consent - but users of the XPhone Connect server always receive presence requests from their federated contacts in the XPhone Connect client and can enable or disable the transmission of the presence themselves if necessary.


An Internet Telephony Service Provider (ITSP) provides digital telecommunications services based on Voice over Internet (VoIP) protocols delivered over the Internet. ITSPs provide their services directly to end customers or as wholesale providers to other ITSPs.


Data packets can choose different routes on their way to their destination. Because these routes are different and also vary from each other in other properties, the individual packets take more or less time to travel through the network. In the worst case, the packets even reach the recipient in the wrong order. This variance in runtime is called jitter. In order for the subsequent digital/analogue converter to work without problems, the packets must be available continuously and sorted.


Jitter Buffer

A jitter buffer is intended to compensate for the runtime differences (jitter). It is located on the receiver side, temporarily stores incoming packets and restores the correct sequence if necessary. After a certain period of time, it then forwards them isochronously. The resulting additional delay is accepted in order to enable smoother playback.

If the jitter of a packet is greater than the buffer size of the jitter buffer, this packet cannot be queued and is discarded. The effect that then occurs is similar to a packet loss.


A connector synchronises users from a Windows Active Directory or from a text file.


A satellite is a virtual machine with Linux as the operating system. The XCC can be outsourced to the satellite to take load off the XPhone Connect server.

Satellite Bridge

An application that is pre-installed on the satellite and is required for communication with the XPhone server. Using Satellite Bridge, the XPhone Server can perform some functions on the Linux operating system (configure firewall, configure XCC, apply updates, etc.).


See XPhone Call Controller

Session Boarder Controller

A Session Border Controller (SBC) is a network component for connecting different computer networks. These computer networks often have different security requirements. For example, SBCs are mainly used in IP telephony networks (VoIP) to couple external (insecure) data networks with internal (secure) networks or to realise so-called sessions. An SBC takes over the control of the signalling and usually also the streaming of the media. An SBC controls the connection setup, connection execution and connection termination of telephone calls or other interactive media involved in a communication.


The softphone feature is available in two versions: Softphone Desktop and Softphone Mobile.

Softphone Desktop

With XPhone Connect Softphone, the telephony functions of XPhone Connect can be used without a system telephone. Voice is input and output either via the computer microphone and speaker, a headset or a conference system. You can use the softphone to replace your hardware phone or use it in addition to your existing phone. With XPhone Connect Softphone, every employee always has a fixed extension number - regardless of the desk at which they set up camp or use their laptop. The softphone is almost fully operational in both terminal server environments and virtualized environments (see Limitations). The control of conversations in the XPhone Connect Client also allows direct access to functions such as a headset - so the microphone can be muted in the call or meeting and calls can be accepted or hung up on supported hardware via the switch on the headset. With the XPhone Connect Softphone you can make calls in HD quality in a VOIP-Ready network. All values that determine your call quality can be displayed at any time via a clear traffic light system. Softphone is a AnyDevice, all functions and requirements apply equally to the feature XPhone Connect Softphone.

Softphone Mobile

Using XPhone Connect Softphone Mobile, the telephony functions (VoiP Client) of XPhone Connect can be used on a smartphone through an app called XPhone Connect Mobile App.


With TeamDesk, small to medium-sized teams of 3-50 people can be organized and evaluated. All incoming calls to the team hotline are automatically or manually transferred to a free employee (team member) as quickly as possible during defined business hours. The employees plan their availability largely self-determined, team-wide status displays and information functions help to identify and resolve bottlenecks. Team leaders have control over this process, and the actions and times are evaluated in the role of the analyst. Overall, team collaboration and accessibility are improved, and analytics provides the opportunity for further optimization in the handling of hotline calls.

Unified Messaging

Designates the fax, voicemail and text message features in XPhone Connect.


See Unified Messaging.

Dialling parameter

Dialing parameters define the phone numbers under which the PBXs or session boarder controllers managed by the system can be reached. The dialing parameters are used for both the CTI and the SIP connection via XCC. A dialing parameter is automatically created during the initial startup.

Web Administration

The Web Administration is the XPhone Connect administration interface. The link is usually as follows:

  • http(s)://[IP|HOST]]/xphoneconnect/admin

Web applications

The XPhone Connect web applications are XPhone Connect Mobile, XPhone Connect Analytics, XPhone Connect UMSettings and XPhone Connect WebMeeting. These web applications are created in Microsoft IIS with the XPhone Connect Server installation.

Web service

XPhone Server can be installed in an operating mode As Web Service. In this operating mode, the XPhone Connect Web applications are installed on the Microsoft IIS (web server).


For the Unified Messaging features you need an XCAPI controller which is connected to a PBX or SBC via a VoIP trunk (SIP or H.323).


See XPhone Call Controller

XPhone Call Controller

The XPhone Call Controller (XCC) is a softswitch or media controller that is seamlessly integrated into the XPhone Connect environment. On this softswitch SIP gateways are set up for Softphone Desktop, Softphone Mobile, AnyDevice, Meeting (audio conference) and TeamDesk. The XPhone Call Controller is installed with the XPhone Connect Server or separately on a Linux satellite. It communicates with the telephone system via SIP trunks and with XPhone Connect via TCP.

XPhone Connect Mobile App

With the mobile app you communicate on the go as comfortably as in the office. You have access to all contacts & your agenda. You can see the presence and availability status of your colleagues, adjust your call forwarding, coordinate via chat, dial into conferences and start ad-hoc meetings.

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