American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 125

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METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS
DE304.09 9-120 Revision 4 : 05/09/12
Metro Baseline Re-Baseline: 04/29/10
minimum. VA is not a substitute for processes and procedures that must be put into
effect when a VA alarm or alert is generated.
A. Interface
The CCTV system shall be interfaced with ETEL, LTEL and PTEL such that
activation of ETEL, LTEL and PTEL within viewing distance of a CCTV camera
shall cause the video scene from that camera to be automatically displayed at
the ROC on the Console (event) monitor (camera call-up). If several calls are
originated, the images shall be rotated on the console (event) monitor. The
image shall be maintained until ETEL, LTEL and PTEL call(s) is terminated.
After that the event monitor should display the last camera image prior to call-up
event.
B. Alarms
CCTV individual alarms shall be transmitted from each station to the CCTV or
SCADA console in the ROC. The alarms will based on the CCTV system and its
alarm capabilities and the project needs.
The alarms, at a minimum, shall include:
- Power failure
- CCTV Communications equipment failure (transmission equipment)
- CCTV Cable Failure
- Video loss
9.10 CABLE TRANSMISSION SYSTEM (CTS)
9.10.1 General
The Cable Transmission System (CTS) shall incorporate both the backbone fiber
optics transmission system and communications metallic cable distribution within the
confines of the yard, wayside/guideway passenger station area, buildings, etc.
A. Backbone System
The backbone CTS shall be an optical fiber-based system to mitigate
electrically-induced interference to the communications system, and shall
provide all voice, data, and CCTV transmission circuits between the ROC and all
fixed locations on the LRT and HRT System (as applicable). Fiber optic terminal
equipment shall be equipped for 1:1 protection.
B. Functional Requirements
1. The system shall operate in a ring (SONET) arrangement, with self-healing
equipment in event of a fiber break or equipment failure. Self-healing shall
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