308U-A1 board is installed to the Universal slot in the C1 chassis and provides a total of three analog trunks and eight hybrid/analog extension ports. Two general purpose relay, one Audio-In and one Audio-Out ports are initially available.
- Install this board to the Universal slot at Controlling/Expansion Chassis
- Enable to connect DSS console to hybrid extension port No.8.
- Enable to connect up to two Door Boxes to hybrid extension port No.6 and No.7.
- The 308U-A1 board and 082U-B1 board cannot be installed in the same system.