I've never used that particular sip device but I have used a lot of other SIP devices. Mitel's SIP support isn't what I would call great, but it does work. I have been able to get every SIP device I've ever tried to communicate with the 3300, but your success may very well depend on your knowledge of SIP (the protocol). Note that even if it works 100%, it won't have a lot of the features that MiNET offers, and it won't even support all SIP features, but you will probably be able to get a connection made and voice flowing through it.