Connecting Nortol Option 61c and 11c PBXes

Yesterday, I came across a requirement of connecting two Nortel PBXes. The option 61c and 11c model. The client will do the calls between these two PBXes via IP WAN. The selected card is VIC2-2MFT-T1/E1 to connect PBXes and Data Circuits on both sites.