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Developer Program - OpenScape Voice

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OpenScape Voice | OpenScape 4000
OpenScape UC | OpenScape Contact Center |


On this page you will find links to information on the various open interfaces of OpenScape Voice.

Call Control related interfaces of OpenScape Voice include SIP for first party call control and CSTA for 3rd party call control. Administrative interfaces are SOAP/XML based, and allow applications to query OpenScape Voice for the content of its system, subscriber and translation database, as well as to provision users and administer features against them.

Access to all the developer resources for each interface are available below.


QSIG Interface

This QSIG Interface Specification describes the OpenScape Voice support of QSIG including basic call, generic functions, supplementary services and PICS.

SIP Interface to Phones

Interface Specification

SIP Interface to Service Providers

The goal of this document is to describe the SIP interface used between an OpenScape Voice system and a Service Provider (SP). The Service Provider (SP) interface may be used only to provide PSTN access, or may also be used to provide SIP interconnection, via the SP, to subscribers in other branches of the same Enterprise or in other Enterprises.

Interface Specification

CSTA Interface

Call Detail Recording Interface

SOAP/XML Subscriber Provisioning Interface

Subscriber provisioning is the management of subscriber data on the OpenScape Voice server, which is managed by a component referred to as the SOAP Server.

The SOAP (Simple Object Access Protocol) Server is an integrated component of the OpenScape Voice system whose function is to handle provisioning requests for subscriber, endpoint, and business group data, including the creation, deletion, modification, and display of these entities and their associated features, or services. The SOAP Server expects SOAP/XML requests conforming to the SOAP Server WSDL (Web Services Definition Language) file, which is included as a product deliverable and is made available to external interface partners. In particular, the OpenScape Voice Assistant uses this interface to transmit provisioning requests from the user to the OpenScape Voice system.

Web SDK Programming Overview

Interface Manual

WSDL Files

SNMP and MIB Description

This document lists the SNMP Traps generated by the OpenScape Voice system via the OpenScape Voice Assistant. The system generates traps to alert management stations that important events have been detected. The OpenScape Voice supports the SNMP v2 trap format. Many of the faults the system generates are derived from these SNMP traps.

Interface Manual

MIB Files

OSV Assistant API

The administration of the OpenScape Voice system is done by the OpenScape Voice Assistant, a web based administration interface. Because there are service and customer scenarios where automatic changes of special OpenScape Voice settings are required by ’foreign’ applications, the OpenScape Voice Assistant also offers a web services interface called OpenScape Voice Assistant API.

This API provides a WSDL (Web Service Description Language) file describing all possible operations and all data structures used.

API Description


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