Nortel NTMN59AA66

External Alerter and Recording Interface for Nortel M3900 Series Phones
This multi-purpose device provides call-in-progress or ringing indication through a connection to an external alerting device, such as a loud bell or flashing light. External alerting devices are ideal for signaling incoming calls in noisy environments such as manufacturing or warehouse areas. The External Alerter and Recording Interface also provides a convenient interface for recording telephone calls at the desktop. As the Interface's ring relay contact, call status (off-hook) relay contact and audio recording operate independently, this device will support simultaneous external ringing, call in progress indication and recording.