The following information describes the general requirements for electrical power supplied for Alcatel-Lucent 1665 DMX. It does not describe specific current or voltage requirements related to the power consumption of Alcatel-Lucent 1665 DMX. The power consumption of the 1665 products is dependent on the circuit packs installed and their operating state. These variables must be taken into account when sizing the power system. For specific voltage and current information see Power specifications in Chapter 10, Technical specifications.
Alcatel-Lucent 1665 DMX products require a reliable low noise power source in accordance with GR-9478. This is usually accomplished by float charging batteries at the input to the Alcatel-Lucent 1665 DMX shelves. Batteries are installed to provide back up power in the event of AC power outages. When deployed in a float charge configuration they also provide filtering of AC power line drop outs and noise generated by equipment in the cabinet/bay. In all cases power must be configured to avoid dropping below or exceeding the voltage limits listed in the tables above.
Care must be taken to insure that electrical noise generated by the power system, fans, or other equipment does not interfere with the operation of the Alcatel-Lucent 1665 DMX products. Electrical noise on the −48 volt power lines at the shelf must not exceed the voice frequency and wide-band noise limits in accordance with GR-947.
Momentary AC power line interruptions are accommodated by the batteries on float charge.
While there is no requirement to limit the rate of power application to the Alcatel-Lucent 1665 DMX shelves, the voltage at the shelf must remain within the specified limits at all times.
In all cases, battery backup power must be configured to avoid dropping below the voltage limits listed in Power specifications. The preferred method of battery backup is a float charge configuration. Alternatively, a separate battery and charger system can be used utilizing a diode "OR" configuration. Systems employing transfer switches are not recommended unless sufficient capacitance is installed to carry the system over through the transfer period.
Grounding must meet the appropriate Telcordia ®, UL, and NEC requirements for outside plant and customer premises applications. The Alcatel-Lucent 1665 DMX shelves require a single common ground reference. The Alcatel-Lucent 1665 DMX shelf frame must be bonded to an earth ground within the cabinet/bay. Alcatel-Lucent 1665 DMX shelf mounting screws should be used to provide a low impedance multipoint electrical connection through the mounting structure to earth ground. A frame ground wire located on the shelf must be connected to the ground.
The DS1/E1 and DS3/EC-1 interfaces (traffic ports) or other metallic telecommunications interfaces must not leave the cabinet/bay unless connected to telecommunications devices providing primary and secondary protection, as per GR-1089 and UL-60950 (UL 60950/ CAN/CSA- 22.2 NO. 60950-00 Safety of Information Technology Equipment, December, 2000).
The Alcatel-Lucent 1665 DMX DS1/E1, DS3/EC-1, and Ethernet ports are tested according to the following note.
WARNING: The intra-building port(s) of the equipment or subassembly is suitable for connection to intrabuilding or unexposed wiring or cabling only. The intra-building port(s) of the equipment or subassembly MUST NOT be metallically connected to interfaces which connect to the OSP or its wiring. These interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE, Issue 5) and require isolation from the exposed OSP cabling. The addition of Primary Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |