Orbtalk have a range of SIP trunk products that work with the Alcatel Omni PCX Enterprise
The Alcatel-Lucent Omni PCX Enterprise is a modular business telephone solution, which allows a business to extend the voice communication capabilities of a headquarters to branches, road and home workers without compromising features, reliability, or scalability.
The Alcatel-Lucent Omni PCX Enterprise provides unmatched interoperability with existing business telephone systems through the native support of open standards such as QSIG (Q-signalling) and CSTA (computer supported telephony application), while embracing emerging standards such as SIP (Session Initiation Protocol) and XML (extensible mark up language).