BT NTE 1H/7A
Fujitsu NTE 1H/7A is part of the Access SDH range. It is an sdsl modem which terminates a leased line, presented as either a G703 or X21 interface. It is usually line powered but looks like it can also be locally powered.
This unit was used to provide an internet circuit over a 2MB's line, it connected to a rather ancient Cisco XXX router.