Cabletron Systems 9A000 ユーザーズマニュアル
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:
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
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
receive sensitivity, 0 to 6 dB path attenuation
for 62.5
µ
m fiber, 0 to 2 dB path attenuation for
50
µ
m fiber
Core Diameter
62.5
µ
m, 50
µ
m
Fiber Diameter
125
µ
m
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)
(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
ANSI T1E1.2/93-020, T1S1/92-185, ITU-T
G.957, Bellcore TR-NWT-000253