Cabletron Systems 9A000 manual C.2.2 155 Mbps OC-3c/STM-1 MM Module, Hardware Specifications

Hardware Specifications

C.2.2 155 Mbps OC-3c/STM-1 MM Module

The following specifications apply to network modules NM-4/155MMSCC and NM-4/155MMSTC:

Description	Specification
Port Capacity	Four SONET/SDH ports per module
Data Rate	155.52 Mbps
Output Buffer	13,312 cell capacity
Media	Multimode fiber
Max. Line Length	~2 km
Connectors	ST or dual SC
Line Encoding	Non-Return to Zero (NRZ)
Framing	STS-3c/STM-1
Clock Accuracy	±20 ppm
Timing	Internal timing or per port network timing
Loopbacks	Transmit and receive loopbacks
Power	-14 to -20 dBm transmit, -14 to -30 dBm receive,
	0 to 10 dB path attenuation
Core Diameter	62.5 ∝m
Fiber Diameter	125 ∝m
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 (HCS) errors
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

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