Part number: AA1404002-E6
This transceiver operates up to 80 meters on 50 μm MMF cable plant and is compliant with channel insertion loss specified in IEEE standard 802.3-2012, Table 52-10, for 2000 (OM3) or 4700 MHz*km (OM4) 50 μm multimode fiber.
Note
Channel insertion loss includes connectors.
The 40GBASE-LM4 QSFP+ transceiver supports a link configuration of a backbone cable between patch panels with one jumper from the transceiver to the patch panel at each end. All ends support duplex LC connectors. Connector return loss requirement is 20 dB or greater (reflectance –20 dB or less).
Other 10GBASE-S transceivers and link parameters do not apply, as the LM4 operates in the 1310 nm region. The 40GBASE-LM4 QSFP+ transceiver contains four transmitters where the signal is internally multiplexed to the Tx port and contains four receivers where the signal is internally demultiplexed at the Rx port.
The 40GBASE-LM4 QSFP+ transceiver replaces a 40GBASE-SR4 QSFP+ transceiver for applications up to 80 meters. The transceiver uses one pair of MMF fibers and a duplex LC connector versus the eight fibers with MPO/MTP connectors that are used with the 40GBASE-SR4 QSFP+ transceiver. The transceiver is not interoperable with 40GBASE-SR4 or 10GBASE-SR transceivers.
For a complete listing of compatible cables and optical transceivers, see the Extreme Optics Compatibility website.
Transmission distances are provided as a nominal guide only. To determine achievable distances, refer to the device's optical specifications and to the specific characteristics of your fiber installation.
The following table lists the overall specifications along with the transmitter, cable plant, and receiver specifications for the 40GBASE LM4 MMF QSFP+ transceiver.
| Parameter | Specification |
|---|---|
| Data rate (nominal) | 4 X 10 Gbps |
| Nominal transmitter center wavelengths | 1271, 1291, 1311, 1331 |
| Link distance (OM3 and OM4) | Up to 80 m maximum |
| Operating temperature range | 0°C to 70°C |
| Transmitter | |
| Maximum total average launch power | 10.3 dBm |
| Maximum average launch power, each lane | 4.3 dBm |
| Maximum average launch power of OFF transmitter | -30 dBm |
| Maximum optical return loss tolerance | 20 dB |
| Receiver | |
| Maximum average receive power, each lane | 4.3 dBm |
| Maximum input optical power | Tolerates direct Tx to Rx connection |
| Stressed receiver sensitivity | -5.0 dBm |
| Applicable Cable Plant | |
| Maximum insertion loss, including connectors | 2.6 dB (OM3) or 2.9 dB (OM4) |
| Minimum optical return loss | 20 dB |
| Maximum link distance | 80 m |