Product comparison · 2 network transceiver modules

Allied Telesis AT-SPBD20DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP vs Allied Telesis AT-SPBD40DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP

Key differences

Maximum transfer distance
- AT-SPBD20DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:20000 m
- AT-SPBD40DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:40000 m
Tx power (min)
- AT-SPBD20DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:-8 dBmW
- AT-SPBD40DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:-3 dBmW
Tx power (max)
- AT-SPBD20DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:-3 dBmW
- AT-SPBD40DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:2 dBmW
Link budget
- AT-SPBD20DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:15 dB
- AT-SPBD40DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP:20 dB

Differences highlightedShow differences only

Comparison of AT-SPBD20DUAL-14, AT-SPBD40DUAL-14
20 specifications	A Allied Telesis AT-SPBD20DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP Model AT-SPBD20DUAL-14 View product	B Allied Telesis AT-SPBD40DUAL-14 network transceiver module Fiber optic 1000 Mbit/s SFP Model AT-SPBD40DUAL-14 View product
Performance4 differ
Maximum transfer distanceDiffers	20000 m	40000 m
Tx power (min)Differs	-8 dBmW	-3 dBmW
Tx power (max)Differs	-3 dBmW	2 dBmW
Link budgetDiffers	15 dB	20 dB

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.