... Internal Calls . ... Listen for the dial tone . ... After beeps dial access code . Note: for frequently called numbers use Station or Speed Dial [see below]. ... Press link button . ... With the first call press link button . ... While you are in a call press link button . ... Note: If the extension is busy or no one answers press link button and will be connected to the call again. ... Press link button to put the first call on hold . ... To mute a call press and hold down the mute button . ...