Strata CTX670 Installation
3-47
Strata CTX I&M September 2002
The fibre connection must conform to both the Optical Budget and Fibre Length specifications. It is
possible to have a fibre connection longer than 3 km (1.86 miles) with less than 9 dB of loss; however,
the CTX670 Remote Expansion Cabinet is sensitive to signal delay and cannot be guaranteed to
operate at distances greater than 3 km (1.86 miles).
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 3-9 and 3-
10. Binary Code Output is generated upon change of a reported condition.
Table 3-9 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 synchronisation of received data not established
0: Frame synchronisation of received data established
0
D3 SYCS 1: System synchronisation between cabinets not established
0: System synchronisation 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 3-10 LED Status Indications
LED Function
Normal
Condition
PWR Blinking: Power is supplied
Off: Power is not supplied
Blinking
SD On: Optical signal not detected
Off: Optical signal detected
Off
RDER On: Code rule violation detected in received data
Off: Code rule violation not detected in received data
Off
SYCF On: Frame synchronisation of received data not established
Off: Frame synchronisation of received data established
Off
SYCS On: System synchronisation between cabinets not established
Off: System synchronisation between cabinets established
Off
RST On: Reset signal from CTU detected
Off: Reset signal from CTU not detected
Off
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