MERLIN LEGEND Communications System Release 7.0 | Issue 1 | |
Pocket Reference | April 1999 | |
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Environmental Specifications | 33 | |
DS1 interface can be configured for connection of either T1 or PRI |
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for basic call control with the 4ESS or 5ESS PRI service |
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specifications. |
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Basic Rate interface (BRI) S/T protocol supports premier digital |
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multiline (MLX) telephones with superior display capabilities and |
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supports the ISDN terminal adapter Data Module for the connection |
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of adjuncts. |
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Environmental Specifications |
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The control unit requires a regulated environment and can be |
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located in any room or closet that is |
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clean. Do not mount the control unit where it will be exposed to direct |
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sunlight. |
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In addition, the control unit should not be |
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conditioning or ventilation units, compressors, fans and blowers, |
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heaters, arc welders, or other machinery that produces electrical |
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interference. |
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The control unit is mounted on a Lucent Technologies |
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backboard. |
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Once installed, it is important to keep the control unit site clear of |
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hazards, such as stacked paper or boxes, that block ventilation. |
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Installing any machinery in the vicinity of the control unit should be |
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avoided. If any |
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painting) is to be done in the area, care should be taken to protect |
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the unit. |
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The following table gives the environmental specifications for the |
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control unit. |
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Control Unit |
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Fully loaded basic carrier |
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Weight: | 45 lb. (20.4 kg) |
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Dimensions: | 14 inches wide x 23 inches high x 12 inches |
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| deep |
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| (35.6 cm x 58.4 cm x 30.5 cm) |
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Fully loaded
(basic carrier plus 1 expansion carrier)
Weight: | 90 lb. (40.8 kg) |
Dimensions: | 25 inches wide x 23 inches high x 12 inches |
| deep |
| (63.5 cm x 58.4 cm x 30.5 cm) |
Fully loaded
(basic carrier plus 2 expansion carriers)
Weight: | 135 lb. (61.2 kg) |
Dimensions: | 37 inches wide x 23 inches high x 12 inches |
| deep |
| (94 cm x 58.4 cm x 30.5 cm) |
Mean Time between Failures
(mean/average time the system is expected to operate before any type of failure occurs) = 2.4 years for a system configured with 24 trunks and 50 stations (extensions).
