Display an existing extension that goes to your VRU "display sta {extension}". This will tell you what DS1 board the existing VRU ports use. It will be the first 5 characters of the station location, IE: 01a0512 would be DS1 board location 01a05. Display the DS1 board setting to determine what the framing and coding is on the T1 "display ds1 {board location)". Print or write down what the settings are on the existing DS1 board, framing and encoding are set here. Then use the command "add ds1 {board location}to add the new board. Again make sure you use the same settings as your exisitng T1's you wrote down above. After you have added the board, add the stations using the "add sta {extenison}" command. The station type should match what your exising stations are. I suspect it is DS1FD, however it may be DS1SA, 2500 ...... But who knows!
Hope This Helps
Chris