SL2100 GETTING STARTED GUIDE344.4 Mounting the VoIP Daughter boardThe IP7WW-VOIPDB-C1 daughter board is used to convert the RTP (Real Time Transfer Protocol)packets via the IP Network and PCM highway. The daughter board is installed on the CPU board.1) Ensure the Chassis are powered off and unplug the AC cord2) Loosen two screws and pull out the CPU board if the CPU is installed.3) Use micro nippers to cut and remove the plastic knockouts (for VoIPDB) of CPU-C1 board.!! For your safety, smooth the cut edges after removing the plastic knockout.4) Install the VOIPDB-C1 board to J2 connector on the CPU board and tighten the four screwsfrom the back side if there is no EXIFB-C1.