Adtran Atlas 550 32 Channel ADPCM Module 1200752L1 Power Supply The Adtran 1200771L1 is a

The Adtran 1200771L1 is a T1 aggregator for the Atlas 800 series of integrated access devices

If you do not have a PoE capable switch or end device

Included with the Adtran NetVanta 4305:

Full Duplexe Speakerphone

1x 48V DC Power Supply Module P/N 1202289L2

Adtran Atlas 550 32 Channel ADPCM Module 1200752L1 Power Supply The Adtran 1200771L1 is aAdtran Atlas 550 32 Channel ADPCM Module 1200752L1 Features: The Adtran Atlas 1200752L1 is a 32 channel voice channel compressor card. The 1200752L1 can compress and utilize the G. 726 voice CODEC for 16Kb and 32Kb conversations, allowing two to four times as many calls on each DS0 channel as standard. The ADPCM module still allows for raw G. 711 voice CODECs for Fax and other necessary implementations. The module is compatible only with Adtran Atlas