The Nortel Norstar M7310 is useful for departments such as purchasing, sales, or accounting, where the same suppliers, customers, or accounts are frequently called. For secretaries, the M7310 (nt8b20) with a BLF attachment can provide for central answering position abilities for smaller businesses, or backup answering services for larger organizations. Norstar system administration is made easy with the M7310 phone. The user can program each button for one touch internal auto-dial, external auto dial or programmable features that would usually require three to four pushes of buttons. A Busy Lamp Field (BLF) can be attached to the M7310 to monitor the station status for buttons programmed for internal autodials.