American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 98)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-93 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

2. Within each Communications subsystem for each segment, like functions

shall be performed by identical units. In no case shall the apparatus or

hardware used in one portion of a segment's subsystem be different from

that used in another portion to perform the same function under similar

operation and environmental conditions. Due to technological

advancements, parts availability and other restrictive factors functional

equivalent equipment may be used between segments.

3. Modular design shall be employed. Electrical and mechanical components

shall be organized in cabinet-mounted plug-in assemblies. The mixing of

equipment associated with two subsystems in one plug-in assembly shall not

be permitted. Apparatus serving similar functions shall be in the same

relative location in all cabinets, wherever practicable.

4. Cabinets, racks and battery racks shall be protected to seismic codes of the

State of California as applicable.

5. All communications equipment located in the passenger stations, wayside,

ROC and the Yards and Shops shall be powered from un-interruptible power

sources or DC back-up battery systems.

6. All communications equipment shall be clearly stenciled such that the

nomenclature is visible from the front with the normal operating covers on

the devices.

a. All multiplexer's channel banks, cross-connect panels, jackfields, fiber

optic patch panels, fiber splice trays, power supplies, frame blocks,

protector blocks, shall be stenciled in a manner that is visible to a person

standing in front of the device.

1) All multiplexer's and channel banks shall be stenciled to show

system identification and the distant terminal that makes up the

system.

2) All cross-connect panels and jackfields shall be clearly stenciled as

to what equipment or channels are appearing on the jackfields.

3) All fiber optic patch panels shall be clearly stenciled on the non

removable portion of the shelf and on the front cover whether

removable or not as to the cable number, the route, and where the

cable goes or distant end.

4) All other equipment, as a minimum, shall be stenciled on the front

cover as to what the device is.

5) All cable terminations shall have cable tags identifying the cable

number, the number of copper pairs or fiber strands in the cable, the

distant end (where the cable goes). Cable identification shall match

with the as built drawings.

6) All blocks and Protectors terminating cables shall be stenciled on the

front of the block with the cable number, the number of pairs in the

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 98

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