I have set up ip trunking between 2 IP500 pbx with centralized voicemail. The local site is V1 while the remote site is V2. Both have release 6.0.18. The internal calls between sites work fine, but the remote site cannot access voicemail or place external calls from the local side. I believe I have all the required licenses but not entirely sure. It might also be a programming issue. Please advise.