• back-lit, bi-color LED buttons illuminate at different levels to indicate conditions
• individually programmable buttons can be designated as talk, listen, or talk with listen
• individually adjustable listen levels
• momentary/latching buttons can be individually programed as momentary only
• answer-back button
• call-waiting tallies
• controls for sidetone, microphone gains, page override, and speaker mute
• programming via a configuration computer or the ICS-2003E Master Intercom Panel.