5312/5324 IP Phones User Guide Feature Keys You can use (MENU) on your phone or the Desktop Tool to program the personal keys as feature keys. The Desktop Tool is a browserâbased interface that makes programming quick and easy. For more information on using the Desktop Tool, please contact your System Administrator.312/5324 IP Phones User Guide Feature Keys You can use (MENU) on your phone or the Desktop Tool to program the personal keys as feature keys. The Desktop Tool is a browserâbased interface that makes programming quick and easy. For more information on using the Desktop Tool, please contact your System Administrator.
What is Surface Mining?. Surface mining involves removing the overburden of a mining site to expose the resources below. Overburden consists of the rocks, soil, and mineral deposits that sit over the materials that are to be mined.
Most surface mines follow the same basic steps to produce coal. First, bulldozers clear and level the mining area. The topsoil is removed and stored for later use in the reclamation process.