Toshiba Strata AirLink DK40i, Руководство по установке и обслуживанию

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DK424i Installation
Step 6: Remote Expansion Cabinet Unit
7-58
Strata DK I&M 6/00
The fiber connection must conform to both the Optical Budget and Fiber Length specifications. It
is possible to have a fiber connection longer than 3 km with less than 9 dB of loss; however, the
DK424i Remote Expansion Cabinet is sensitive to signal delay and cannot be guaranteed to
operate at distances greater than 3 km.
Status Indicators
The RRCU1A card set provides two status indicators: a set of LEDs on the ROMS1A card and an
RS232C Monitor Port on the RRCU1A. Status indications are provided according to
Tables 7-23
and 7-24 . Binary Code Output is generated upon change of a reported condition.
Maximum Fiber Length 3 km (500~1000 MHz/km fiber)
2 km (200~400 MHz/km fiber)
Optical Budget (Loss) 9 dB (one way)
Minimum Bend Radius 30 mm
Round Trip Delay Time 30 micro seconds.
Transmit Power >= -23.5 dBm
Receiver Sensitivity <= -30 dBm
Table 7-23 RS-232C Binary Code Output
BIT Label Function
Normal
Condition
D0 SD
1: Optical signal not detected
0: Optical signal detected
0
D1 RDER
1: Code rule violation detected in received data
0: Code rule violation not detected in received data
0
D2 SYCF
1: Frame synchronization of received data not established
0: Frame synchronization of received data established
0
D3 SYCS
1: System synchronization between cabinets not established
0: System synchronization between cabinets established
0
D4 RST
1: Reset signal from CTU detected
0: Reset signal from CTU not detected
0
D5 Not Used 0
D6 Not Used 1
D7 Not Used 0
Table 7-22 Fiber Optic Specification (continued)
Item Specification