Jun 05

Some Common Fiber Optical Transceivers

Fiber optic transceiver including both transmitter and receiver in a single module is an important equipment transmitting and receiving data to support the normal operation of optical fiber data transmission system. The market currently offers a wide selection of fiber optic transceiver for use with different types of wire, fiber and wavelength and so on.

A group of companies joined together to agree on package standards also called multisource agreements (MSAs). The package standards help customers choose the best transceivers to their applications and make sure the they can use transceiver from multiple vendor without redesigning the board. In the following text, some common fiber optic transceivers according to package standards are introduced in details.

9-PIN&GBIC&SFF
9-Pin transceiver
 is also known as 1×9 optical transceiver. This transceiver has a single row of output pins at the rear of the device. The optical interface is usually ST or duplex SC receptacles. It is mainly used in fiber optic transceiver, optical switches, single/multi-mode converter as well as some industrial control applications.

GBIC transceiver, namely gigabit interface converter transceiver, is a plug-in interface designed to allow a pluggable interface for Gigabit Ethernet. It offers a standard, hot swappable electrical interface and can support a wide range of physical media from copper to long-wave single mode optical fiber, at lengths of hundreds of kilometers. However, this type of transceiver is gradually replaced by SFP transceiver which has more advantages.

SFF (small form-factor) transceiver is a compact optical transceiver used in optical communications for both telecommunication and data communications applications. Compare to 9-pin and GBIC transceivers, SFF transceivers is smaller allowing more ports in a given area. SFF transceivers have 10 or 20 I/O (input/output) pins that solder to the board.

SFP&SFP+&XFPSFP transceiver, small form-factor pluggable, small hot-pluggable optical module is a pluggable version of SFF transceiver and an upgraded version of the early GBIC module, with 10 I/O connections at the rear of the package. With smaller volume and higher integration, it is currently the most popular fiber optic transceiver.

SFP+ transceiver, also called enhanced SFP or SFP plus, with a higher transmission rate usually up to 8.5 G or 10 G, is a kind of optical transceiver module specified for 8Gbps/10Gbps/16Gbps fiber channel and 10Gigabit Ethernet applications.

XFP transceiver, 10Gigabit small form-factor pluggable transceiver, is the next generation SFP transceiver for 10Gbps application. This type of transceiver is hot-swappable and protocol-independent and is usually used to 10Gbps SONET/SDH, fiber channel, Gigabit Ethernet and other applications, but also of CWDM DWDM link.

X2&XENPAKXENPAK transceiver is a pluggable transceiver for 10Gbps applications, specifically 10 Gigabit Ethernet. The electrical interface is called XAUI, which provides four 2.5Gbps signals to the transmitter, which multiplexes or serialize them into a single 10Gbps signal to drive the source. It uses a 70-pin electrical connector. The optical interface is usually a duplex SC.

X2 transceiver is based on the XENPAK transceiver standards. It is shorter than XENPAK transceiver but uses same 70-position electrical and duplex SC interfaces. Unlike XENPAK, X2 devices mount on top of the board and are low enough to allow boards to be stacked side by side.

If you are look for fiber optic transceiver, you can visit Fiberstore which provides a wide selection of fiber optic transceivers with high quality.

Jan 08

Address Common Questions When Using the Compatible Devices

When we begin to come into compatible products industry, there is always a problem that confused us, we are not sure if a device can be compatible with another device in different brands, even after they connected, did not know what would happen, well, this page I will explain the problem with the actual example.

For example, we need to connect Dell M6330 blades switches to a HP 2910al by fiber sfp+ over sr (50/125 um OM3 fiber from tyco). Then i ordered the SFP+ module for the 2910al (J9008A), two transceiver modules for the DEll switches (one each) and 4 x Dell 10gbase-sr sfp LC LC transceiver. And if all the connection between the M6220 done well, but when i plug the Dell transceiver into the switch there is no link up, what it means that if the HP switch refused to work with the Dell transceivers, but there is no event log notice of incompatibility, Then the questions is, if i can connect the HP switches to Dell by SFP+, or do you know if using non-HP brand SFP+ transceivers will work with the HP transceiver?

sfp

Well, in this issue, If you are indeed using optical transceivers in the switches, then no switch has any idea about what transceivers are in any other switch. Switches only know about the directly connected (plugged-in) transceivers. Now, as for the transceivers themselves. The J9008A is simply an expansion module. HP ProCurve switches will not accept non-HP ProCurve transceivers. So, if you have been trying to use the Dell SFP/SFP+ transceivers with the HP 2910al, that would be your problem. You are required to obtain HP ProCurve transceivers and use those.

sfp module

In general, we have to say that HP switches do not accept non-hp transceivers, such as Cisco, Dell, Juniper, Netgear and so on…You can’t plug a Dell transceiver in a ProCurve switch and expect it to work. Although there is a MSA (Multi Source Agreement) for SFP transceiver, in practice HP switches do not accept non-HP transceivers. Cisco equipment also can only utilize the Cisco SFP module and other brand module or equipment is not supported. If you just plug in the other module, Cisco port information will be displayed on the Unsupport or unknown. In simple terms, as for the unknown GBIC, Cisco device does not provide any warranty. In a word, when we choose the device, we just have to choose the same brands products, compatible products also can be used. Above the Figure shows that the popular compatible module in our Fiberstore.