STC-LTU25D

STC-LTU25D is a 64kb/s kilostream Line Terminating Unit. Three LJU style connectors are provided, the left hand side is the Kilostream circuit, the two right hand side ones are for dial on demand backups using analogue phone lines. These would appear to be normal PSTN Master Sockets.

Full Size - Telspec ltu25e