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Optical Datasheet:  https://www.juniper.net/us/en/local/pdf/datasheets/1000329-en.pdf

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SPF : 1G ( SKU:  740-013111           1000 Base-T RJ45 SFP Module) 

SFP+ :   10G

SPF28:  25G ( 10G )

They share a similar form factor as SFP/SFP+

While SFP28 is backward compatible with SFP+ and SFP, the reverse isn't true; an SFP+ port cannot use an SFP28 transceiver.


QSFP :  40G 

Quad (  4 Channel of 10G )



QSFP+ : 40G

Quad (  4 Channel of 10G )  

QSFP+ is often backward compatible with QSFP

QSFP+ providing improved performance than QSFP

4x10G or

1x40G connection

QSPF28 : 100G

Quad ( 4 channel of 28G )   “28” means each lane carries up to 28G data rate.

QSFP28 can do:

4x25G breakout connection,

2x50G breakout, or

1x100G



QSFP56-DD  : 400G

MPO connector

QSFP56-DD  ( 4x 56G channels + double density = 4x 112G ??? )

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