These are the intercom units proffered when there's a need to control more than one portal from a single station. The units offer a choice of 3, 5 or 10 portals to be controlled.

Here's a list of its main features:

• Selective calling, monitoring and optional All Call
• 3, 5 and 10-calll masters
• Selective door release
• Push-to-talk at master, hands-free reply at called station
• Adjustable communication volume
• Surface mount
• Automatically turns off in 20 seconds