I have an IPO 500 with VMPro, a PRI and we are using SIP trunks primarily for outgoing LD calls. I need to link a second IP 500 to the 1st 500 but the 2nd IPO will not have any trunks other than an IP line to the 1st IPO, the 2nd IPO needs to send and receive calls via the PRI and also make calls via the SIP trunk on the 1st IPO and also use VMPro. Can anyone get me started? I have never done linked IPO's before. I have VCM's and voice networking licenses on both 500's, I don't need to call extension to extension between the systems. TIA