PN 76.8820IM30-A
Tellabs 8820 Multi-service Switch Router System Installation
A-6
Optical PLMs and Power Requirements
OC-12 PLMs
OC-12 PLMs
The OC-12/STM-4 PLM
is a four-port STS-12/STM-4 module that can be
plugged into one of the four slots on a 8820 MSR.
Faceplate
Detail
❑
Four independent 622.08 Mbps SONET/SDH STS-12/
STM-4 ports over single-mode fiber, short-reach (2 Km) or
intermediate-reach (15 Km), with LC (SMF) duplex
connector
❑
Channelized OC-12/STM-4 (up to 12 DS3/STS-1 channels
per port), or concatenated OC-12c/STM-4c (one OC-12c/
STM-4c channel per port)
❑
PPP/ATM/FR protocol over SONET/SDH per port
❑
Per-channel ATM cell or POS frame payload
❑
SONET/SDH-compliant with Bellcore GR-253, ITU G.707,
and ANSI T1.105-1995
Figure A-2
OC-12/STM-4 PLM Faceplate
Table A-5
OC-12 PLM Optical Power Requirements
Description
Application
Connector
Avg Launch
Power (dBm)
Rx Saturation to Rx
Sensitivity (dBm)
Wavelength
(nm)
Distance
(m)
OC-12 MS SMF IR
IR-1
LC
-15 to -8
-8 to -28
1274 to 1356
15K
OC-12C MS SMF IR
IR-1
LC
-15 to -8
-8 to -28
1274 to 1356
15K
OC-12 MS SMF LR
LR-1
LC
-3 to 2
-8 to -28
1280 to 1335
40K
OC-12C MS SMF LR
LR-1
LC
-3 to 2
-8 to -28
1280 to 1335
40K
PLM Status
PLM Port Status