Very-high-bit-rate digital subscriber line (VDSL) technology is part of the xDSL family of modem technologies, which provide faster data transmission over a single flat untwisted or twisted pair of copper wires. The 1-Port VDSL2 Annex A Mini-PIM carries the Ethernet backplane. When the Mini-PIM is plugged into the chassis, the Mini-PIM connects to one of the ports of the baseboard switch. The 1-Port VDSL2 Annex A Mini-PIM on the SRX Series Services Gateway provides ADSL backward compatibility.