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QSFP+ Transceiver Slots
QSFP+
Transceivers
Breakout Cables
All AT-x550 Switch models have two QSFP+ transceiver slots.
The slots support the following types of 40Gbps transceivers:
AT-QSFPSR4 transceiver - requires 12-strand OM4 fiber optic
cable and has a maximum operating distance of 150m (492 ft).
AT-QSFPLR4 transceiver - requires single-mode fiber optic cable
and has an operating range of 2m (6.6 ft) to 10km (6.2 mi).
AT-QSFP1CU and AT-QSFP3CU direct connect cables in lengths
of 1 and 3 meters, respectively
AT-QSFP-4SFP10G-3CU and AT-QSFP-4SFP10G-5CU breakout
cables in lengths of 3 and 5 meters, respectively
You can use QSFP+ transceivers as standard networking ports or as
stacking ports for the VCStack feature.
Note
The QSFP+ transceiver slots are initially configured as stacking slots
for the VCStack feature. If you will use the switch as a stand-alone
unit, you can use the slots with transceivers as regular Ethernet
networking ports by disabling the VCStack feature. For instructions,
refer to Chapter 6, "Configuring the Switch for Stand-alone
Operations" on page 99. For instructions on VCStack, refer to the
x550 Series Installation Guide for Virtual Chassis Stacking.
For a list of supported QSFP+ transceivers, refer to the x550 Series data
sheet on the Allied Telesis web site.
When the VCStack feature is disabled and the switch is operating as a
stand-alone device, the QSFP+ transceiver slots support the AT-QSFP-
4SFP10G-3CU and AT-QSFP-4SFP10G-5CU breakout cables. Refer to
Figure 8. A breakout cable converts a QSFP+ transceiver slot from one
40Gbps port to four 10Gbps ports.
Figure 8. QSFP+ to SFP+ Breakout Cable
x550 Series Installation Guide for Stand-alone Switches
35
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