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C-15
Hardware Specifications
C.2.8 155 Mbps OC-3c/STM-1 SM Module
The following specifications apply to network modules NM-4/155SMSRC
and NM-4/155SMLRC:
Description Specification
Port Capacity Four SONET/SDH ports per module
Data Rate 155.52 Mbps
Output Buffer 13,312 cell capacity
Media Short or long reach single mode fiber
Max. Line Length ~2 km (short reach); ~40 km (long reach)
Connectors FC
Line Encoding Non-Return to Zero (NRZ)
Framing STS-3c/STM-1
Clock Accuracy ±20 ppm
Timing Primary and secondary 8kHz reference from
internal (default) or network
Loopbacks Transmit and receive loopbacks
Power - Short Reach -8 to -15 dBm transmit power, -8 to -23 dBm
receive sensitivity, 0 to 8 dB path attenuation
Power - Long Reach 0 to -5 dBm transmit power, -10 to -34 dBm
receive sensitivity, 10 to 29 dB path attenuation
Core Diameter 10 µm
Fiber Diameter 125 µm
Wavelength 1310 nm
Statistics/Alarms SONET/SDH statistics include Loss of Signal
(LOS), Loss of Frame (LOF), Loss of Pointer
(LOP), Far End Block Errors (FEBE), Alarm
Indication Signal (AIS), Far End Receive Fail-
ure (FERF), Yellow Alarm, Bit Interleaved Par-
ity errors (Line BIP-24, Section BIP-8, Path
BIP-8), Header Check Sequence errors (HCS)
Compliance ATM Forum STS-3c UNI v3.1, ITU-T I.432,
ANSI T1E1.2/93-020, T1S1/92-185, ITU-T
G.957, Bellcore TR-NWT-000253