X2 is a standardized package of the 10G optical transponders . X2 are available for both versions 10G Ethernet and 10G Fibre Channel. X2 optical transponder is only applied to the data communication optical fiber connection (not used in the telecommunications transmission network), and their size is smaller than XENPAK optical transponder.Electrical interface of board is standardized, be knowed as XAUI (4X3.125Gb / s).
X2 optical modules is evolved from the standard of Xenpak, and its internal functional modules are same to Xenpak basically, the circuit board applications are same too .that only need one optical module to achieve 10G Ethernet interface functions. As Xenpak optical modules put-on the board need to slot on the circuit board , so it will be achieve complex and can not achieve high density applications. improved X2 optical modules ' size only about half of Xenpak, can be directly put on the board, so apply to high-density rack systems and PCI card applications.
X2 optical modules are available in two circuit interface: XAUI and Serial Framer Interface (SFI-4), which can be used for 10G Ethernet and also can be used for OC-192 SDH and 10GFC. X2 compared to Xpak changes are mainly reflected in the rail system, the industry generally believe that the two specifications will be integrated together finally.
keywords :Cisco X2-10GB-ER, HP J8436A X2 Transceiver Module
2012年1月9日星期一
2012年1月5日星期四
Cisco SFP-10G-SR transceiver
The SFP-10G-SR hot swappable SFP+ transceiver use LC connector interface, supports a link length of 26m on standard Fiber Distributed Data Interface (FDDI)-grade multimode fiber (MMF). Using 2000 MHz*km MMF (OM3), up to 300m link lengths are possible. The SFP-10G-SR SFP+ modules are easy for deployment and maintenance, Rohs compliant and meet the IEEE standards for 10G Ethernet.
Brief that
• Product Type: SFP+
• Interfaces/Ports 1 x 10GBase-LR
• Interfaces/Ports Details: 1 x LC Duplex Connector 10GBase-LR
• Data Transfer Rate: 10Gbps Gigabit Ethernet
• Wavelength: 1310nm
• Transfer Distance: 10km
• Compatibility: Cisco switches and routers.
2012年1月3日星期二
Brief introduction of fiber optic transceiver
What is fiber optic transceiver
Fiber optical transceiver module is composed of optoelectronic devices,functional circuitry and optical interface etc.The optoelectronic devices include transceiver and receiving two parts.
Transceiver part is: input a certain rate of signal by the internal driver chip to drive the Semiconductor lasers(LD)or the light emitting diode(LED) emits the corresponding rate of modulated optical signal.And the transceiver part can make the power of output optical signal stability because of its internal light power automatic control circuit.
Receiving part is: after a certain rate of the optical signal inputed to the optical module,the optical signal will be converted to electrical signal by the optical detection Diode. Then output the corresponding bit rate signal through the pre-amplifier. The output signal generally is PECL power Level. While the input optical power less than a certain value will output the awarning signal .
Classification of fiber optic transceiver
Divided by rate:
Ethernet applications 100Base, 1000Base (Gigabit), 10GE
SDH applications, 155M, 622M, 2.5G, 10G
According to package sub: 1 × 9, SFF, SFP, GBIC, XENPAK, XFP
1 × 9 package - welding optical module, the general rate is not higher than gigabit, multi-use SC connectors
SFF package - welding small package optical modules, generally no higher than gigabit speeds,use of LC interface
GBIC package - hot-swappable Gigabit Interface optical module, with SC Interface
SFP package - hot little package module, the highest data rate of up to 4G, LC interfaceto use more
XFP package - 10G optical modules used in Gigabit Ethernet, SONET and others ystems, with LC interface
According to the type of laser : LED, VCSEL, FP LD, DFB LD
Divided by the emission wavelength: 850nm, 1310nm, 1550nm, etc.
Divided according to use: Non-Hot Plug (1 × 9, SFF), hot-pluggable (GBIC, SFP, XENPAK, XFP)
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