OpenScape Business TAPI 170

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OpenScape Business TAPI 170 TSP is a "third party" telephony service provider that supports the Microsoft TAPI V2.1 functionality. TAPI 170 enables Microsoft Windows-based CTI applications to concurrently monitor and control phones or devices connected to OpenScape Business.


  • Centrally connected third-party TAPI Service Provider.
  • Compatible with the Microsoft TAPI 2.1 Standard
  • Telephony functions are available on each connected PC client via the TAPI 2.1 client/server architecture.
  • No additional TSP client software is required
  • Supported telephony features
  • Selection or dialing of incoming/outgoing calls from the PC
  • Transmission of incoming call number, if signaled
  • Consultation and transfer
  • Toggle/Connect
  • Conferencing
  • Call forwarding
  • Forwarding callers
  • Answering a call through the application
  • Initiating a call through the application
  • Blind/Supervised transfer (also called "transfer before answer / consultation transfer")
  • Transmission of feature codes
  • Monitoring of the phone (call states, failure, etc.)
  • Provision of an ACD interface
  • Monitoring / access to keypad for system telephones (HFA)
  • Control of display/LED for system telephones (HFA)
  • Connection to standalone and networked OpenScape Business systems
  • Support for MULAP members / station numbers


The OpenScape Business TAPI 170 software is installed on a Microsoft Windows server on the network. The connection to OpenScape Business occurs via a CSTA link. A physical connection between the Windows PC and the phone is not required.
OpenScape Business TAPI 170 can be set up in different operating modes on single node systems or in the OpenScape Business network.

Server-based TAPI Applications to OpenScape Business using TAPI 170

The server applications and the TAPI 170 software are installed on the so-called "Telephony Server" in the network. The server applications provide their associated clients in the network with telephony features for stations that are configured within OpenScape Business TAPI 170. The TAPI 170 software is connected to the CSTA interface of OpenScape Business over the LAN.
For this connection, one CSTA link of OpenScape Business as well as one TAPI license for each configured TAPI station are required.

TAPI 170 Server based TAPI Application

Figure: TAPI 170 with server-based TAPI application

TAPI 120 in CSTA Mode

All TAPI 120 client PCs are connected to the same CSTA link of OpenScape Business. OpenScape Business internally multiplexes all TAPI 120 connections.

TAPI 120 connected via CSTA

Figure: TAPI 120 in CSTA mode with OpenScape Business X5R and UC Booster Card


The maximum number of TAPI 120 client PCs that can be connected to OpenScape Business depends on the model. More information on this can be found within the OpenScape Business Sales Information.


Supported Systems

OpenScape Business X3 OpenScape Business X1
OpenScape Business X5 OpenScape Business X3
OpenScape Business X8 OpenScape Business X5
Open Scape Business S OpenScape Business X8

Supported Devices

TAPI 170 supports the same devices as the OpenScape Business CSTA interface.
These are described in section 1.6.11, "CSTA Interface".


For operation of OpenScape Business TAPI 120 some HW / SW prereqisites have to be fulfilled

HW/SW prerequisites

Computer HW

The PC hardware must comply with at least the system requirements specified by Microsoft for the operating system used as well as the requirements of the TAPI application. In addition, an Ethernet LAN interface is required.

Computer SW

Operating systems

  • Microsoft Windows 7 (32/64 Bit) Service Pack: SP1
  • Microsoft Windows 8 32/64 bit except Windows RT

OpenScape Business

Regardless of the number of TAPI 120 clients a CSTA link of the OpenScape Business is required. For this purpose, a UC Booster (card or server) is a prerequisite

Requires the Web Services Interface. A UC Booster (card / server) must not be present in / on the system


Some documents in various languages are available for OpenScape Business TAPI 120. As there are:

  • Installation manuals
  • Technical release note

The documents can be obtained from the following source:

Software Delivery / Deployment

The OpenScape Business TAPI 120 software is supplied on a separate data medium. It is not part of the OpenScape Business System software. The software package can also be downloaded free of charge from the Software Download Server (SWS) within the Partner Portal of Unify.


The use of OpenScape Business TAPI 120 is licensed on a subscriber basis.
The TAPI licenses are managed within the OpenScape Business system and can be used for both TAPI 120 modes. When using the "MULAP" feature, a TAPI license is required for each station within the MULAP.
Note: TAPI 120 in the WSI Mode requires only a TAPI user licenses. A UC user licenses is not necessary.

SW Upgrade / Migration

Before migrating from HiPath 3000 with HiPath TAPI 120 V2 to OpenScape Business V1 with TAPI 120 in the WSI mode the functionality of the TAPI services should be verified in order to ensure that they are sufficient. If they are not sufficient either TAPI 120 in the TAPI 120 CSTA mode or Call Bridge Collection should be used.
Ensure that a OpenScape Business TAPI License is available within OpenScape Business for every TAPI 120 user. Existing HiPath TAPI 120 user licenses cannot be used further on within OpenScape Business.
HiPath TAPI 120 SW has to be uninstalled and to be replaced by OpenScape Business TAPI 120 SW on the client PC.


Only Microsoft Windows operating systems can be used in conjunction with TAPI 120.
For installations on terminal servers, OpenScape Business TAPI 170 must be used instead of TAPI 120.

Useful Tools

Further technical Information