Nortel M3900 Series Analog Terminal Adapter, Charcoal, NTMN68AA70, Unused
The Analog Terminal Adapter (ATA) expands the flexibility of the M3900 series phones by providing an economical connection to analog devices such as a laptop, PC modem, fax machine, analog phone, or a variety of off-the-shelf audio and visual alerting devices directly through the digital phone.
