Alcatel-Lucent 1850 TSS-5 and its circuit packs are hardened for use in outside plant (OSP) applications.
Outside plant cabinets for use with Alcatel-Lucent 1850 TSS-5 equipment in NAR applications are compliant with GR-4874.
Refer to Telcordia ® Generic Requirements for Electronic Equipment Cabinets, GR-487, Issue 2, March 2000. Typical requirements covered in this specification include Water and Dust Intrusion, Wind-Driven Rain, Thermal Shock, Impact Resistance and Shock and Vibration.
All covers and faceplates that are part of the Alcatel-Lucent 1850 TSS-5 must be in place when installed in the cabinet to minimize losses in cooling and maximize resistance to electromagnetic interference. Apparatus Blanks (see engineering drawings) are ordered separately and must be used where no circuit packs are installed.
Refer to Alcatel-Lucent 1850 Transport Service Switch (TSS-5) Release 3.0 - 7.2 Engineering and Ordering Information.
Cable access ports must be provided in the base of the splicing compartment to permit the entrance of metallic and fiber cables into the equipment. Ports must be sized to allow cables to be placed in accordance with minimum bend radii guidelines, as specified by the cable supplier.
If a battery compartment is provided, it must be segregated from the electronics compartment. A seal must be provided to prevent gases from seeping into the electronics and splicing compartments. The compartment must be vented to the outside.
The heat from the Alcatel-Lucent 1850 TSS-5 rack-mount shelf is dissipated by horizontal air flow provided by fans inside the shelf. Air flow caused by equipment cabinet fans must not impede the function of the Alcatel-Lucent 1850 TSS-5 shelf fans. The Alcatel-Lucent 1850 TSS-5 requires a minimum airflow of 100 LFM.
The cooling systems and temperatures within a cabinet enclosure must be monitored to avoid conditions that can cause heat-related failures.
A system failure alarm must be provided for cabinet cooling systems with forced air ventilation and active heat exchange systems
A temperature sensor must be located in the electrical equipment compartment to provide a high-temperature alarm when an internal cabinet temperature of 65°C is reached. The air temperature must be measured at the inlet of the top Alcatel-Lucent 1850 TSS-5 shelf.
The cabinet must be resistant to continuous low-level vibrations from sources including train and vehicular traffic, rotating machinery, construction activities, etc. Physical tests must be performed to assure the cabinet does not amplify vibrations from these sources such that the vibration levels transmitted to the equipment do not exceed design limits. Tests must be performed in accordance with GR-487 and GR-63 to verify the performance of the cabinet and equipment during vibratory test conditions.
Inlet air to the Alcatel-Lucent 1850 TSS-5 equipment must be controlled within the range of −40°C to +65°C. Ambient air from outside the cabinet cannot be introduced into the electronics compartment or used in any way to directly cool the Alcatel-Lucent 1850 TSS-5 equipment within the cabinet.
Heat exchange systems for the cabinet must be sized so that maximum inlet temperature will not exceed 65°C even when the shelf is equipped in such a way that it approaches the maximum current drains detailed in Alcatel-Lucent 1850 TSS-5 current drain. Also, the cabinet must be sized to ensure that inlet temperature will not exceed 65°C given both severe outside ambient temperature and solar heating relative to the conditions of the region where the shelf is deployed.
The supplier must supply performance data upon request for cabinets cooled by compact heat exchangers or any other method. This information may include the appropriate factor of safety, or excess capacity, accounting for normal fouling of the heat exchanger core. During operation, the time rate of change of the internal air temperature must not exceed 30°C/hr as the result of solar heating and radiation cooling of the enclosure, and power cycling the equipment.
The relative humidity of the internal air of an outside cabinet must be maintained in accordance with GR-63. This applies even when the equipment within the cabinet does not have power applied, e.g., during installation of equipment. During such times a source of heat, or desiccant packs, must be provided for maintaining the necessary relative humidity level.
For the fully equipped cabinet configuration, a functional test of the Alcatel-Lucent 1850 TSS-5 shelf must be performed with all systems powered at their appropriate levels for typical service applications that approach the maximum current drains detailed in Alcatel-Lucent 1850 TSS-5 current drain. The cabinet surfaces must be respectively heated at the appropriate maximum solar radiation levels. Absorbed solar heating must be estimated using the formulations and methods in accordance with GR-487 and the ASHRAE handbook.
Refer to 2001 ASHRAE Handbook Fundamentals — American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., Atlanta GA.
During this testing measure, record the following:
Power level into the cabinet in amperes
Air Velocities in the airflow channels formed by the Alcatel-Lucent 1850 TSS-5 circuit packs are in linear ft./min.
Air temperature entering and exhausted from the Alcatel-Lucent 1850 TSS-5 shelf (measured in °C)
Three K or T type thermocouples must be added at the inlet and exhaust of all circuit pack slots. Take the average of the three thermocouples for each circuit pack slot for both inlet and exhaust and record (Tinlet_avg, Texhaust_avg, TC type, and slot number).
Ambient temperature (temperature outside the cabinet and measured in °C).
Solar heating loads on respective cabinet surfaces (°C).
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