Fiber-Mart, worldwide leading supplier in fiber optic network, fttx, fiber cabling, fiber testing.

by www.fiber-mart.com A common confusion about SFP and SFP+ compatibility is that if I can use the SFP module in SFP+ slot. When I connect the SFP transceiver to SFP+ transceiver, can SFP+ negotiate down to 1G? Or is it possible to use SFP+ module in the SFP port on my switch? Can SFP+ copper twinax cable can negotiate down to 1G to support SFP? Can 1G and 10G can exist in the same link? All these questions usually create a giant headache for many engineers. After looking up many relevant documentation, now I will conclusion the answers in this article.   SFP Can be Plugged into  SFP+  Ports in Most Situations I’m not sure about the specific switch model, but as a general rule of thumb, SFPs will work in SFP+ slot, but SFP+ optics do not work in SFP slots. It’s just a power availability thing. When you plug the SFP module in SFP+ port, the speed of this port is 1G not the 10G. And sometimes this port will lock the speed at 1G until you reload the switch or do som...

by www.fiber-mart.com CWDM systems have channels at wavelengths spaced 20 nanometers (nm) apart, compared with 0.4 nm spacing for DWDM. This allows the use of low-cost, uncooled lasers for CWDM. In a typical CWDM system, laser emissions occur on full eighteen channels at eighteen defined wavelengths: 1610 nm, 1590 nm, 1570 nm, 1550 nm, 1530 nm, 1510 nm, 1490 nm, 1470 nm, 1450 nm, 1430 nm, 1410 nm, 1390 nm, 1370 nm, 1350 nm, 1330 nm, 1310 nm, 1290 nm, 1270 nm. Besides, for CWDM systems an industry standard color coding scheme is used. The latches of the CWDM SFP transceivers match the colored port indicators on the passive units therefore guaranteeing simple setup. Following color codes and wavelength are valid for CWDM.   Full  CWDM  Channels (18 Channels) Mux Demux Solution The WDM system uses a multiplexer at the transmitter to combine several wavelengths together, each one carry different signal with bite-rate up to 10G and a demultiplexer at the receiver to s...

by www.fiber-mart.com Data centers generally accommodates hundreds or even thousands of network switches, it happens when you have to connect switches from different vendors (i.e. switch X from Cisco and switch Y from HP). As the switches only fit their own brand-based fiber optic transceiver, the main issues thus falls into this: is it possible to contact two different vendor’s fiber optic transceiver module and form a viable link? The answer is yes – but you still have to take some critical aspects into account.   Case Study: Standard of  Fiber Optic Transceiver  is the Key Sometimes people have to mix switches and fiber optic transceivers, mainly because the following reasons:   They already have brand X and they need more switches and they shop on price. Hence different brands They need to replace switches but do not have money for all and they buy brand X and plan on going to brand X completely but it takes time to get there. There exist quite a...

FM SKU#:SKU00876N Model#:FMFP-4G85-3M MFG PART#: FMFP-4G85-3M The Fiber-Mart 4G series is small form factor pluggable module for 4x/2x/1x Fiber Channel and 1000BASE-BX Gigabit Ethernet single fiber communications. It is with the SFP 20-pin connector to allow hot plug capability. The transmitter section uses class 1 laser compliant according to International Safety Standard IEC 60825. The receiver section uses an integrated detector preamplifier (IDP) mounted in an optical header  Key Features Data-rate up to 4.25Gbps operation 300m with MMF 850nm VCSEL Laser Transmitter Hot-pluggable SFP footprint duplex LC connector Interface Class 1 FDA and IEC60825-1 Laser Safety Compliant Digital Diagnostic Monitoring Compatible with SFP MSA Compatible with SFF-8472 +3.3V single power supply and TTL Logic Interface Applications 1.063/2.125/4.25Gbps Fiber Channel 1000Base-SX Ethernet CPRI/OBSAI Other optical transmission systems Ordering Information Part No. Data Rate (...

CWDM-SFP10G-80 The CWDM-SFP10G-80 1470-1610nm series optical transceiver is designed for fiber communications application up to 10G, which fully compliant with the specification of SFP+ MSA SFF-8431.This module is designed for single mode fiber and operates at a nominal wavelength of CWDM wavelength. There are eight center wavelengths available from 1470nm to 1610nm, with each step 20nm. A guaranteed optical link budget of 23 dB is offered.The module is with the SFP+ connector to allow hot plug capability. Only single 3.3V power supply is needed. The optical output can be disabled by LVTTL logic high-level input of TX_DIS. Loss of signal (RX_LOS) output is provided to indicate the loss of an input optical signal of receiver.This module provides digital diagnostic functions via a 2-wire serial interface as defined by the SFF-8472 specification. Key Features Hot-Pluggable SFP+ footprint 8-Wavelength CWDM DFB Transmitter from 1470nm to 1610nm, with step 20nm Average Output Powe...

by www.fiber-mart.com More and more high bandwidth services such as high definition(HD) video, online games and video conference challenging the traditional network, 100G as a ease network bandwidth technology, becomes the new hope of the operator.   100G industry chain has matured, with all components and subsystems have commercial capacity of multiple manufacturers, the market also needs the support of 100G system, the backbone network will be fully transferred to the 100G-leading era. From the early 2013, the focus point of 100G is from the laboratory into 100G network deployment and the commercial 100G has started.   Four Technical Challenges Of 100G   Although the 100G has been carried out, but the 100G transmission technology meets four technical challenges.   First, high power consumption. The achievement mechanism of 100G technology is complex, the optical receiver requires the use of coherent reception and processing of the DSP, the key ch...