DSLAM - Digital Subscriber Line Access Multiplexer
As the other replies have said, the DSLAM is the device to which individual lines connect. It is installed at the PCP (cabinet) for FTTC.
"Street cabinet and DSLAM installation" almost certainly means installing the fibre twin cabinet at a PCP. These cabinets are prebuilt - they're physically installed, then power, fibre and the multi-pair tie cable(s) to the existing cabinet are connected.