Cisco Cisco CWDM Transceiver Modules 백서
Test Methology
Two channel configurations were implemented to test the performance of the BiDi transceiver with Berk-Tek Leviton
Technologies optical components, as shown in Figure 2(a) and (b). Figure 2a depicts a typical link between two switches
in a data center, whereas the Figure 2b depicts two sectors of a data center that are interconnected using patch panel.
The total number of connections , channel lengths, and fiber types are listed in Table 1.
Technologies optical components, as shown in Figure 2(a) and (b). Figure 2a depicts a typical link between two switches
in a data center, whereas the Figure 2b depicts two sectors of a data center that are interconnected using patch panel.
The total number of connections , channel lengths, and fiber types are listed in Table 1.
When testing a single MDP trunk as shown in Figure 2(a), engineers connected the QSFP BiDi transceivers to the MTP-LC
module panel (cassette) using a 5-meter LC-LC patch cord on each side. The trunk lengths in the testing varied from
90 meters (OM3) to 300 meters (OM4+). Similarly, for testing concatenated trunks, the transceivers were connected to the
trunks via a module panel (cross connect) using 5-meter patch cords. The trunks were concatenated using an MTP
module panel (cassette) using a 5-meter LC-LC patch cord on each side. The trunk lengths in the testing varied from
90 meters (OM3) to 300 meters (OM4+). Similarly, for testing concatenated trunks, the transceivers were connected to the
trunks via a module panel (cross connect) using 5-meter patch cords. The trunks were concatenated using an MTP
®
-MTP
patch panel, as shown in Figure 2(b).
Table 1:
Fiber System Channel Configurations, Maximum Reach, and Respective Insertion Losses
TEST CONFIGURATION
PRODUCT TYPE
TOTAL CHANNEL LENGTH
IL (A/B)
4
dB
NUMBER OF CONNECTORS
Configuration A
OM3
100 m
1.1/1.8
4
OM4
150 m
1.2/2
4
OM4
240 m
1.7/1.8
4
OM4+
240 m
1.6/1.6
4
OM4+
260 m
1.7/1.7
4
Configuration B
OM4+
200 m
1.8/1.7
5
OM4+
225 m
1.8/1.7
5
3
The total number of connections does not include the connections made to and from the QSFP modules.
4
A/B denotes the two fibers of the LC-LC patch cords that are at both the ends of the channel.
Figure 2: Schematic of test configurations for evaluating the Cisco BiDi transceiver performance. BiDi-A configuration is for testing a single trunk,
and BiDi-B is to test concatenated trunks with increased number of connectors.
and BiDi-B is to test concatenated trunks with increased number of connectors.
12-Fiber MDP Trunk
QSFP-40G-SR-BD
QSFP-40G-SR-BD
HDX MTP-LC
12-Fiber Cassette
HDX MTP-LC
12-Fiber Cassette
12-Fiber MDP Trunk
Figure 2(b) : Configuration B
HDX MTP
Adapter Plate
5 m LC-LC
Patch Cord
5 m LC-LC
Patch Cord
QSFP-40G-SR-BD
QSFP-40G-SR-BD
HDX MTP-LC
12-Fiber Cassette
HDX MTP-LC
12-Fiber Cassette
Figure 2(a) : Configuration A
5 m LC-LC
Patch Cord
5 m LC-LC
Patch Cord
12-Fiber MDP Trunk
A P P L I C A T I O N N O T E
( c o n t i n u e d )
BerkTekLevitonTechnologies.com
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