Hello, I had a question regarding the Gen 1 VWIC-(1or2)MFT-T1/E1 and the DI (Drop and Insert) VWICs. I wanted to know basically if a DI (Drop and Insert)(Ie. VWIC-2MFT-T1-DI) could be used to do regular ISDN PRI, say in a back to back configuration for lab testing. Same for the E1 version of the card? Thanks.