Card Descriptions
hierarchical and non-hierarchical shaping, port rate limiting, and VC fairness
under congestion. Both vc-fair and hsvc-fair SAR images support statistics.
The SAR devices support two, four, or eight distinct CoS queues for each ATM
PVC, allowing a mix of priority- and class-based queuing for each ATM PVC.
When configuring the EPD threshold in hsvc-fair mode, the value used should
not exceed 500.
Note: The number used after threshold (in this case, 5000) has an acceptable
range of 1 to 10000; however, in the case of hsvc-fair mode, it should
not be configured greater than 500. If it is configured above 500, poor
performance can result.
This card is the same size as all other SmartEdge line cards and occupies a
single slot in the chassis. The following types of SFP optical transceivers are
supported on any of the ports:
• SONET OC-3/STM-1 SR-0—Short Reach
• SONET OC-3/STM-1 IR-1—Intermediate Reach
Table 87 8-Port ATM OC-3c/STM-1c Card Specifications
Specification SR-0 IR-1
General
Number of ports
(1)
88
Speed 155 Mbps 155 Mbps
Protection None None
Interface ATM OC-3c/STM-1c SR-0 ATM OC3c/STM1c IR-1
Link power budget
(2)
10.0 dB 12.0 dB
Nominal wavelength
1310 nm 1310 nm
Connector type LC LC
Cable type MMF SMF
Compliance SFF-8472 and INF-8074i
ANSI-T1.105.06 SR-0
SFF-8472 and INF-8074i
Telcordia GR-253, ITU G.957
Transmitter
Optical output power –20.0 dBm (min)
–14.0 dBm (max)
–15.0 dBm (min)
–8.0 dBm (max)
Center wavelength range
1270 to 1380 nm 1260 to 1360 nm
Extinction ratio 10.0 dB (min) 8.2 dB (min)
Spectral width (RMS) 7.7 nm (max) 7.7 nm (max)
Receiver
Wavelength range
(3)
1260 to 1360 nm 1260 to 1580 nm
11527/153 30-CRA 119 1170/1 Uen A | 2010-04-09
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