Carrier Access Corporation Adit 600

The TDM network normally passes around data in bundles on T1 carriers. This is a channelized medium, and is capable of carrying a very dense bundle of calls over a single cable. To make individual numbers available, they need to be broken out on individual lines for equipment to be plugged into. A channel bank performs this function by taking a bank of Bearer or "B" channels from a T1 and turning them into individual telephone circuits.

The CAC Adit 600 is a telco channel bank. These units were commonly found in roadside equipment cabinets serving subscriber lines where distance or density outstripped the existing copper plant in the area. Designed to consume 2 T1 lines and provide a mix of phone and data service, these extremely ruggedized devices are commonly found in places where space is tight and conditions are harsh.