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This page describes how to make an intercom call on M55 or M58.
The M500 provides an internal calling capability between any handsets or desksets without having to set up an account. Each user's device will be referenced by an internal ID and Device name that enables the system to place and answer calls between devices. Only 1-to-1 calling is available through intercom. Intercom calls cannot be conference or transferred.
Your M55 / M58 displays "Calling".
When the far end answers, your M55 / M58 displays "On a call" with a timer.
To end the intercom call, press End.
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