Adtran 1221052L1 High Bit Rate Digital Subscriber Line (4-WIRE)
- System controller for ADTRAN E220 shelves with HFACs
- Common control point for up to 1299 HDSL or HDSL2 circuits
- ADTRAN E220 shelf-mount OS interface
- X.25 interface for TL1 access
- Compatible with Hekimian’s Performance Monitoring Integrator (PMI) system