The OASIS platform provides a fully featured call control engine across The call control module abstracts all the complexity and details of telephony signalling systems across different networks (e.g. ISDN, CAS, SIP etc) and provides complete control at a low level for advanced signalling (e.g. INAP, CAMEL, ISUP and SS7).

OASIS offers two methods of call control to ensure that  open standards are fully supported and also goes beyond what the standards provide, so that complex call control scenarios across any telephony network can easily be developed.

Based on the design goals of the W3C, telephony applications are broken up into two parts:  Call Control and User Interaction.  Within the OASIS platform, user interaction is implemented using VoiceXML or TSL and Call Control is handled via CCTSL or CCXML.

OASIS provides the CCTSL (Call Control Telephony Scripting Language) Call Control module that provides all the standard call control features of CCXML and advanced call control supporting ISDN, ISUP, INAP and CAMEL (for SS7 Intelligent Networks) signalling. In Q2, 2008 delivery of our OASIS CCXML Call Control will be available ensuring our support of open standards.