Qsfp+ Transceiver Ports; Qsfp+ Transceivers; Breakout Cables; Figure 8: Qsfp+ To Sfp+ Breakout Cable - Allied Telesis AT-x550-18XTQ Installation Manual

QSFP+ Transceiver Ports

QSFP+
Transceivers

Breakout Cables

All AT-x550 Switch models have two 40Gbps QSFP+ transceiver ports, 17
and 21.
The ports support the following 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 the QSFP+ transceiver ports as standard networking ports or
as stacking ports with the VCStack feature.
Note
The QSFP+ transceiver ports are initially configured as the default
trunk ports for the VCStack feature. For instructions on how to
configure the units for stand-alone operation, refer to the x550
Series Installation Guide for Stand-alone Switches.
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 ports support the AT-QSFP-
4SFP10G-3CU and AT-QSFP-4SFP10G-5CU breakout cables. Refer to
Figure 8. A breakout cable converts a QSFP+ transceiver port from one
40Gbps port to four 10Gbps ports.
Figure 8. QSFP+ to SFP+ Breakout Cable
x550 Series Installation Guide for Virtual Chassis Stacking
37