Cisco Systems offers a Telco / wall-mount kit for Cisco 4000 series. The kit includes 2 Telco rack-mount or wall-mount brackets, 2 M3 machine screws, 4 10-32 machine screws, 8 8-32 flat-head machine screws, 4 Hex-head wood screws (mounts chassis to plywood board) and an installation diagram.