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LED indicator

LED Status

LED

Description

Flashes green

Telephone line connected, NRT is on hook and operational.

Blinks green

NRT is on hook and busy (dial pause, bus access).

Steady green

Telephone line in use, NRT is off hook.

Flashes red

A fault is present (last routine call unsuccessful, microphone or loudspeaker test failed, alarm button misconfigured).

Steady red

No telephone line connected, alarm not possible.