If you need to connect a new IP solution to a DPNSS PBX or simply need to bridge between SIP and TDM networks then ApplianX is the solution. 

The ApplianX IP Gateway acts as a SIP-to-TDM gateway, supporting divert, transfer, route optimisation and MWI over SIP, DPNSS and Q.SIG.

The ApplianX DPNSS-to-Q.SIG Gateway supports all supplementary services and has been tested and certified with Avaya and Cisco.