Environmental Specifications - Lucent Technologies MERLIN LEGEND Release 5.0 Pocket Reference

unit can connect to another system's control unit via either an off-premises
telephone (OPT) line or an analog or digital tie trunk.
Digital 2.048-MHz bus supplies a 64-kbps channel on each of the 216 time
slots.
68EC020 Motorola CPU running at 16 MHz with zero wait states provides
fast system performance.
Memory data retention saves time by ensuring that system and extension
programming information is retained for 5 days, depending on the system
configuration, in case of power failure or system shutdown.
Integrated voice and data capabilities allow users to talk while
transmitting data at speeds up to 64 kbps.
DS1 interface can be configured for connection of either T1 or PRI for
basic call control with the 4ESS or 5ESS PRI service specifications.
Basic Rate interface (BRI) S/T protocol supports premier digital multiline
(MLX) telephones with superior display capabilities and supports the ISDN
terminal adapter Data Module for the connection of adjuncts.

Environmental Specifications

The control unit requires a regulated environment and can be located in any
room or closet that is temperature-controlled and clean. Do not mount the
control unit where it will be exposed to direct sunlight.
In addition, the control unit should not be co-located with air conditioning or
ventilation units, compressors, fans and blowers, heaters, arc welders, or
other machinery that produces electrical interference.
The control unit is mounted on a Lucent Technologies pre-drilled
backboard.
Once installed, it is important to keep the control unit site clear of hazards,
such as stacked paper or boxes, that block ventilation. Installing any
machinery in the vicinity of the control unit should be avoided. If any
pollution-producing work (such as sanding or spray painting) is to be done
in the area, care should be taken to protect the unit.
Table 1–4 gives the environmental specifications for the control unit.
Control Unit
Fully loaded basic carrier
Weight:
Dimensions:
Fully loaded 2-carrier system (basic carrier plus 1 expansion carrier)
Weight:
Dimensions:
Fully loaded 3-carrier system (basic carrier plus 2 expansion carriers)
Weight:
Dimensions:
Mean Time Between Failures
22
45 lb. (20.4 kg)
14 in. wide x 23 in. high x 12 in. deep
(35.6 cm x 58.4 cm x 30.5 cm)
90 lb. (40.8 kg)
25 in. wide x 23 in. high x 12 in. deep
(63.5 cm x 58.4 cm x 30.5 cm)
135 lb. (61.2 kg)
37 in. wide x 23 in. high x 12 in. deep
(94 cm x 58.4 cm x 30.5 cm)