Starting at Metasys system Release 7.0, dual trunk integration support is available as a factory standard on NIE29, NIE39, NIE49, and NIE59 models shipped with the date code of RY10416 or later. For NIEx9s purchased prior to this release, you can apply the dual trunk integration feature using the NIEx9 Driver Manager tool. For information on how to apply the dual trunk functionality to older NIEx9s, see Updating the NIE DLL Protocol.