Product comparison · 2 network transceiver modules

Legrand Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM) vs Legrand Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM)

Key differences

Maximum data transfer rate
- Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM):1000 Mbit/s
- Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM):40000 Mbit/s
Interface type
- Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM):SFP
- Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM):QSFP+
Fiber optic connector
- Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM):LC
- Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM):MPO
Maximum transfer distance
- Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM):40000 m
- Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM):400 m
Product colour
- Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM):Grey
- Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM):Silver

Differences highlightedShow differences only

Comparison of GLC-BX-D-40-LEG, QSFP40GXSR4AR-LEG
13 specifications	A Legrand Cisco[R] GLC-BX-D-40 Compatible TAA Compliant 1000Base-BX SFP Transceiver (SMF, 1550nmTx/1310nmRx, 40km, LC, DOM) Model GLC-BX-D-40-LEG View product	B Legrand Arista Networks[R] QSFP-40G-XSR4 Compatible TAA Compliant 40GBase-SR4 QSFP+ Transceiver (MMF, 850nm, 400m, MPO, DOM) Model QSFP40GXSR4AR-LEG View product
Performance4 differ
Maximum data transfer rateDiffers	1000 Mbit/s	40000 Mbit/s
Interface typeDiffers	SFP	QSFP+
Single-mode fiber (SMF) supportedKnown for one	Yes	Unknown — not stated by the source
Fiber optic connectorDiffers	LC	MPO
SFP transceiver standardKnown for one	BX	Unknown — not stated by the source
Maximum transfer distanceDiffers	40000 m	400 m
Tx power (max)Known for one	1550 dBmW	Unknown — not stated by the source
Rx power (max)Known for one	1310 dBmW	Unknown — not stated by the source
Multi-mode fiber (MMF) supportedKnown for one	Unknown — not stated by the source	Yes
WavelengthKnown for one	Unknown — not stated by the source	850 nm
Features1 differ
Product colourDiffers	Grey	Silver

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.