The OTX ISDN call control API provides a rapid and easy way to develop ISDN applications based on Odin TeleSystems' powerful OTX hardware. OTX ISDN allows developers to develop innovative applications which include voice messaging systems, automatic call distribution systems, telephony switching, signaling engies, call simulators etc.

OTX-ISDN is supported on multiple popular operating systems and uses the same API across the entire span of Odin's OTX Thor family of ISDN PRI network cards. ISDN API uses standard OTX methids for event notification. Simple API functions are provided to place and answer calls. These two features combined provide an easy migration path from one network interface card to another while preserving application platform independence.