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H3C SFP-GE-PX40-U-SM1310-A Compatible 1000Base BX BIDI SFP TX1310nm-RX1490nm 40km LC SMF DDM Transceiver Module

H3C SFP-GE-PX40-U-SM1310-A Compatible 1000Base BX BIDI SFP Transceiver Module (TX1310nm/RX1490nm SMF 40km LC DDM)

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Product Details

H3C Compatible	SFP-GE-PX40-U-SM1310-A	Vendor Name	Walsun
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	TX1310nm/RX1490nm	Max Distance	40km
Connector	Simplex LC	Transmitter Type	1310nm DFB
Cable Type	SMF	Receiver Type	PIN
TX Power	-5.0~0dBm	Receiver Sensitivity	<-24.0dBm
Protocols	Gigabit Ethernet, Gigabit Fibre Channel, MSA Compliant	Operation Temperature	0 to 70°C (32 to 158°F)

SFP vs SFP+

SFP and SFP+ transceivers are virtually identical in size and appearance. The primary difference is that SFP+ is an updated version that supports higher speeds up to 10Gbps. The difference in data rate also accounts for a difference in transmission distance—SFP typically has a longer transmission distance. SFP+ specifications are based on SFF-8431. In terms of SFP vs SFP+ compatibility, SFP+ ports often accept SFP optics but at a reduced speed of 1Gbps. Be aware, however, that you cannot plug an SFP+ transceiver into an SFP port because SFP+ does not support speeds less than 1Gbps.

GBIC vs SFP

Prior to SFP and SFP+, the most common transceivers were gigabit interface converters, or GBICs. SFP, sometimes called mini-GBIC, replaces GBIC because of its smaller size.

How to Choose SFP Transceivers?

In addition to SFP vs SFP+ vs QSFP, you’ll also need to consider the application. SFP transceivers are available in different types depending on what they will be used for, for example single-mode vs multimode SFP. Single-mode SFP transceivers work with single-mode fibre, whereas multimode SFPs are compatible with multimode fibre. Additionally, there are long-reach WDM SFP transceivers for multiplexing, simplex SFPs for single fibre applications, video SFP transceivers for transmission of high-definition video, and PON SFP transceivers for fibre-based access networks. SFPs are available in commercial and extended operating temperature ranges, with or without extended diagnostics capabilities.

What is a QSFP Port?

QSFP, or quad small form factor pluggable, is another type of compact, hot-swappable transceiver. It supports Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP modules are commonly available in several different types: 4x1Gbps QSFP, 4x10Gbps QSFP+, 4x28Gbps QSFP28.

QSFP+ and QSFP28 are the most recent versions, which support numerous 40Gbps and 100Gbps applications. Both QSFP+ and QSFP28 modules integrate 4 transmit and 4 receiver channels. While QSFP+ supports 4x10Gbps or 1x40Gbps, QSFP28 can do 4x25Gbps, 2x50Gbps or 1x100Gbps, depending on the transceiver used. The specifications for QSFP are based on SFF-8436.

What are the Different SFP Interface Types?

1000BASE-T (Gigabit Ethernet)

SFP interfaces allow for Ethernet connections using specific modules. These modules connect directly into the SFP port and provide the user with an RJ45 interface with which to connect to their other device. This is supported through the 1000BASE-T standard, representing Gigabit Ethernet over copper cables (shielded twisted pairs).

Direct Attach Copper (DAC)

Direct Attach Copper (DAC) cable, is a twinaxial copper cable that comes with transmission modules from the factory, allowing it to connect directly into SFP ports. Twinax cabling is a cable type, similar to coaxial cabling, but with two inner copper conductor lines as opposed to the singular line found in coaxial cabling.

Fibre

Fibre cables are one of the fastest and most common sources of SFP data transmission, because it transfers data via pulses of light which pass along one or more plastic or glass fibres, transmitting the light to the receiving end where the data is read and converted. Fibre is also not affected by EMI due to the fact it uses light to transmit data, rather than electrical signals.

There are many different options when choosing a fibre cable, below are the specifications of each fibre standard:

Fibre Cable Type	Jacket Colour	Fibre Core Diameter	Optical Source
OS1	Yellow	8 – 10.5?m (Commonly 9?m)	VCSEL
OS2	Yellow	8 – 10.5?m (Commonly 9?m)	VCSEL
OM1	Orange	62.5?m	LED
OM2	Orange	50?m	LED
OM3	Aqua	50?m	VCSEL
OM4	Aqua	50?m	VCSEL
OM5	Lime Green	50?m	VCSEL