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AT-XEM2-4QS Line Card
The AT-XEM2-4QS Line Card has four QSFP+ transceiver slots that
support the following types of 40Gbps transceivers:
AT-QSFPSR4 transceiver - Has a maximum operating distance of
150m (492 ft). Requires 12-strand OM4 fiber optic cable.
AT-QSFPLR4 transceiver - Has an operating range of 2m (6.6 ft) to
10km (6.2 mi). Requires single-mode fiber optic cable.
AT-QSFP1CU and AT-QSFP3CU direct connect cables in lengths
of 1 and 3 meters, respectively
The LED states for the QSFP+ transceiver slots on the AT-XEM2-4QS
Line Card are described in Table 4.
Table 4. Link and Activity Status LEDs for the AT-XEM2-4QS Line Card
State
Solid Green
Flashing Green
Off
Note
The eight line card slots in the AT-SBx908 GEN2 Switch are divided
into four slot groups, with each group consisting of two slots, as
listed here:
Group 1 - Line card slots 1 and 2
Group 2 - Line card slots 3 and 4
Group 3 - Line card slots 5 and 6
Group 4 - Line card slots 7 and 8
The bandwidth of a card slot group with two AT-XEM2-4QS Line
Cards will be slightly less than line-rate when all the traffic packets
are 193 bytes or less in size. This limitation is likely to occur only in
lab-test scenarios and can be avoided by not installing two AT-
XEM2-4QS Line Cards in the same card slot group.
AT-SBx908 GEN2 Installation Guide for Virtual Chassis Stacking
Description
The transceiver has established a
40GBase link to a network device.
The transceiver is transmitting or receiving
data.
Possible causes of this state are listed
here:
- The slot is empty.
- The transceiver has not established a
link to a network device.
- The LEDs are turned off. To turn on the
LEDs, use the eco-friendly button.
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