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Chapter 7. Planning for Media Modules
59
Optical Specifications
This section describes the optical specifications for 622Mbps transmitters and
receivers with SC singlemode and SC multimode connectors.
When taking the optical power budget for an ATM link between a port and an end user
device, be sure to use the values specified in the
ATM User-Network Interface (UNI)
Specification V3.0
, ATM Forum.
Frequency
622.08 MHz
Wavelength (
l)
1300 nm
Singlemode: 1274 min / 1356 max
Multimode: 1270 min / 1380 max
Optical Power
Table 37. Optical Specifications for 1-port 622Mbps Modules
Cable Type
Maximum
(dBm)
Minimum
(dBm)
Power
Budget
(dBm)
Max Length
Singlemode 9/125 micron
Transmitter Power
-8
-15
13
15 km
(9.32 miles)
Receiver Sensitivity
1
-7
-28
Multimode 50/125 micron
Transmitter Power
-14
-24
2.5
500 m
(1,640 ft)
Receiver Sensitivity
1
-14
-26.5
Multimode 62.5/125 micron
Transmitter Power
-14
-20
6
800 m
(2,624 ft)
Receiver Sensitivity
1
-14
-26
1
The range over which the receiver is guaranteed to provide output data with a
Bit Error Ratio (BER) better than or equal to 2.5 x 10
-10
.
Summary of Contents for 8265
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