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C-9
Hardware Specifications
C.2.4 622 Mbps OC-12c/STM-4c MM Module
The following specifications apply to network module NM-1/622MMSCC
and NM-1/622MMSTC:
Description Specification
Port Capacity One SONET/SDH port per module
Data Rate 622.08 Mbps
Output Buffer 13,312 cell capacity
Media Multimode fiber
Max. Line Length 500 m
Connectors SC or ST
Line encoding Non-Return to Zero (NRZ)
Framing STS-12c/STM-4c
Clock Accuracy ±20 ppm
Timing Primary and secondary 8kHz reference from
internal (default) or network
Loopbacks Transmit and receive loopbacks
Power -20 to -14 dBm transmit power, -26 to -14 dBm
receive sensitivity, 0 to 6 dB path attenuation
for 62.5 µm fiber, 0 to 2 dB path attenuation for
50 µm fiber
Core Diameter 62.5 µm, 50 µm
Fiber Diameter 125 µm
Wavelength 1270 - 1380 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 (Line BIP-24, Section BIP-8, Path BIP-8)
errors, Header Check Sequence (HCS) errors,
cells received (RxCells), cells transmitted
(TxCells)
Compliance ATM Forum AF-PHY-0046.000, ITU-T I.432,
ANSI T1E1.2/93-020, T1S1/92-185, ITU-T
G.957, Bellcore TR-NWT-000253