American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 126)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-121 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

complete fast enough to not drop any active telephone call. All equipment

comprising the CTS shall have carrier class reliability.

2. Voice and Data on the CTS shall operate on the fiber optic transmission

service at a bit rate capable of transmitting the type and quantity of signals

required without impeding the operation of the LRT or HRT System. The

CTS shall provide voice grade channels for telephone, public address audio,

radio audio and control, and data channels for the SCADA, UFS and other

subsystems. Bandwidth and quality of service shall be allocated in

accordance with the specific subsystem requirements.

3. The Metro private telephone system shall have dual paths within the carrier

multiplex subsystem. Loss of a fiber optic line or repeaters shall cause the

remote multiplex unit to switch to the redundant transmission link.

4. CTS repeaters shall be located so that maintenance functions can be

performed safely without affecting normal operations.

5. Full featured CTS management tools shall be included that allow system

configuration and alarms to be managed from a single remote location.

Maintenance and diagnostic capabilities shall be provided at each local

node.

C. Design Criteria

1. The CTS shall consist of, but not be limited to, the following components:

a. Transmission Lines (cable and fibers)

b. Transmission Line repeaters and housing

c. Transmission line termination apparatus

d. Transmission line supervision with automatic transfer apparatus may be

either internal or external optical equipment.

e. T-Carrier and FT-Carrier or SONET Equipment with the following

MINIMUM Functions:

1) Common Logic Redundancy

2) Power Supply Redundancy

3) Output Redundancy (Either Constant or Hot Standby for optical

equipment.

4) Remote Alarm Annunciation

5) At ROC, dual redundant nodes shall be provided.

f. Mounting Racks and Cabinets

g. Duct Liners

h. Voice Frequency Patch Panels

i. Fiber Optic Patch Panel

j. Network switching and routing equipment

2. Electro-optic Modulators or Optical Transmitters (sources), converting an

electrical signal input to an optical signal by modulating a light source, shall

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 126