What is Compact SFP (CSFP) fiber transceiver?

by http://www.fiber-mart.com

The CSFP MSA defines a transceiver mechanical form-factor with latching mechanism and a host board, SFP-like, electrical edge connector and cage. The CSFF MSA also defines a transceiver mechanical form-factor. The Dual-Channel CSFP has the same mechanical dimensions as the industry standard SFP transceiver and is compatible with the standard SFP cage. The Single-Channel CSFP and CSFF are half the size of the industry standard SFP and SFF packages. The CSFF design is modular to enable configurations of integrated 1, 2 or 4 channel modules.These highly integrated compact transceiver modules will enable network system vendors to increase port density and data throughput, while reducing network equipment cost.CSFP transceivers are compatible with the Compact Small Form- Factor Pluggable (CSFP) Multi-Source Agreement (MSA).
Compact-SFP is a new kind of fiber transceiver usually known as CSFP fiber optic transceivers.CSFP has the same size of SFP, Cisco also called this as 2- channel bi-directional SFP. The 2-channel 1000BASE-BX-D SFP module, also known as Compact BIDI SFP, integrates two Bi-directional interfaces in one SFP module. The Compact SFP is always connected to two 1000BASE-BX10-U interfaces over two single strands of standard SMF with an operating transmission range up to 20km.
The CSFP transceiver consists of 2-channel Bi-directional transceiver unit with five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1310nm DFB laser and the 1490nm PIN photo-detector. The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access. Conventional SFP will function when plugged into a C-SFP socket, at the same time no damage to C-SFP and host board if C-SFP module is plugged into a conventional SFP socket. If you have interests about this CSFP transceiver, please feel free to send email to us.
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What is Compact SFP (CSFP) fiber transceiver?

by http://www.fiber-mart.com

The CSFP MSA defines a transceiver mechanical form-factor with latching mechanism and a host board, SFP-like, electrical edge connector and cage. The CSFF MSA also defines a transceiver mechanical form-factor. The Dual-Channel CSFP has the same mechanical dimensions as the industry standard SFP transceiver and is compatible with the standard SFP cage. The Single-Channel CSFP and CSFF are half the size of the industry standard SFP and SFF packages. The CSFF design is modular to enable configurations of integrated 1, 2 or 4 channel modules.These highly integrated compact transceiver modules will enable network system vendors to increase port density and data throughput, while reducing network equipment cost.CSFP transceivers are compatible with the Compact Small Form- Factor Pluggable (CSFP) Multi-Source Agreement (MSA).
Compact-SFP is a new kind of fiber transceiver usually known as CSFP fiber optic transceivers.CSFP has the same size of SFP, Cisco also called this as 2- channel bi-directional SFP. The 2-channel 1000BASE-BX-D SFP module, also known as Compact BIDI SFP, integrates two Bi-directional interfaces in one SFP module. The Compact SFP is always connected to two 1000BASE-BX10-U interfaces over two single strands of standard SMF with an operating transmission range up to 20km.
The CSFP transceiver consists of 2-channel Bi-directional transceiver unit with five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1310nm DFB laser and the 1490nm PIN photo-detector. The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access. Conventional SFP will function when plugged into a C-SFP socket, at the same time no damage to C-SFP and host board if C-SFP module is plugged into a conventional SFP socket. If you have interests about this CSFP transceiver, please feel free to send email to us.

How To Choose A Fiber Transceiver

Fiber transceiver used in the Ethernet cable cann’t be overwritten, you must use the fiber to extend transmission distance of the actual network environment, help fiber last-km line to connect to the metro and the outer layer of the network playa huge role. With fiber optic transceivers, also need to upgrade from copper to fiber optic, but lack of funds, manpower or time the user provides an inexpensive program.
In order to ensure fully compatible with the NICs, repeaters, hubs and switches and other network equipment of other manufacturers, fiber optic transceiver products must strictly comply with 10Base-T, 100Base-TX, 100Base-FX, IEEE802.3 and IEEE802.3u Ethernet standard. In addition, EMC anti-electromagnetic radiation shall comply with FCC Part15. Nowadays, the major domestic carriers are great efforts to build the residential network, campus and enterprise networks, so the amount of fiber-optic transceiver products are constantly improved to better meet the access network construction needs.
How to choose a fiber transceiver? Due to fiber converter is one of the LAN connection device, it is necessary to consider the mutual compatibility with the surrounding environment, and product stability, reliability, and vice versa: the prices were lower, cann’t get customer all like!
1. Whether to support full-duplex and half duplex?
Some chips on the market currently only use full-duplex environment, can not support half-duplex, such as the receipt of other brands of switches or HUB and it is using half-duplex mode, will cause serious conflict and loss.
2. Whether and other optical transceiver done connection test?
An increasing number of currently available fiber optic transceivers, transceivers, such as the mutual compatibility of different brands of transceivers in advance didn’t make the test will produce loss, the transfer time is too long, suddenly fast and slow phenomena such as.
3. Whether there is a safety device to prevent packet loss?
Some vendors in the manufacture of fiber optic transceivers, transceiver, in order to reduce costs, often the data transfer mode register, this approach is the biggest drawback is instability in the transmission, packet loss, and the best is to use the buffer line. can be safe and to avoid data loss.
4. Temperature adaptability?
Fiber optic transceivers, when used, will produce high fever, high temperature (not greater than 85C), fiber optic transceiver is working properly? Is very worthy of the factors that customers consider!
5. Whether conforming to the IEEE802.3u standard?
Such as fiber optic transceivers comply with IEEE802.3 standard, that the delay time control in 46bit, it means that the transmission distance of fiber-optic transceiver will be shortened if more than 46bit!

How to choose 3G Digital Video SFP ?

 

In fiber optic network industry,  Digital video SFP is responsible for transmitting HD or higher standard video, so there are 3G digital video SFPs suitable for SD/HD/3G-SDI. and so more and more people are interested in SFP modules.

 

What is SDI?

 

Digital Video SFP is a 3G-SDI standard optical transceiver designed to transmit SDI, HD-SDI, or DVB digital video signals over fiber. It is a dual channel optical transmitter module which transmits optical serial digital signals that defined in SMPTE 297-2006.

3G.jpg
Digital Video 3G Transmitter CWDM

Fiber Optic Transport of HD/SD-SDI It is becoming increasingly necessary and economically feasible to transport HD/SD-SDI signals over fiber instead of coaxial cable. SDI, the abbreviation for Serial Digital Interface, is a digital video interface standard made by SMPTE organization. This serial interface transmits every bit of data word and corresponding data through single channel. Due to the high data rate of serial digital signal(a kind of digital baseband signal), it must be processed before transmission.Additional SDI standards include HD-SDI, 3G-SDI, 6G-SDI, and 12G-SDI. HD-SDI was standardized by SMPTE 372M in 1998. It can support 1.485Gbps interface. 3G-SDI consists of a single 2.970Gbps serial link that allows replacing dual link HD-SDI.

 

3G Digital Video SFPs Types

 

3G digital video SFPs include 3G SDI SFP, BiDi SFP and CWDM SFP. According to different standards, it can be divided into different types. Based on the transmission mode, it can be divided into single Tx, single Rx, dual Tx, dual Rx and TR transceivers; by standards into MSA and non-MSA; by operating wavelength into 1310nm, 1490nm, 1550nm and CWDM wave length.It also exists video modules of electrical interfaces that adapting mini BNC port to coordinate with SFP slot-supporting digital matrix. Currently there are also on the market some crossover video transceivers, for example, transfer the encoded SG-SDI to IP protocol conversion module can be used in traditional Ethernet switch, replacing video codec equipment. 3G digital video SFPs also have 3G video SFP and 3G video pathological patterns due to different applications.the data rate of digital SDI as below.

 

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Now we say that what are 3G-SDI pathological patterns? Pathological patterns, also called SDI proving ground, are a whole test signal. And it must be done during blackout. This signal is tough to handle by serial digital system, and significant to check the system performance. Pathological patterns often contain the richest low-frequency energy which statistically happens one per frame. Pathological patterns test is also an important indicator of video SFP modules.  Fiber-Mart provides a series of 3G-SDI SFP modules to support transmission rates from 50 Mbps to 3 Gbps. These digital video modules are specifically designed for SMPTE SDI pathological patterns, allowing hot-plug capability with the 20-pin SFP connectors.

 

According to this article, i believe you have known some knowledges about 3G Digital Video SFP. Fiber-MART can  provide you custom service and  a series of 3G-SDI SFP modules to support transmission rates from 50 Mbps to 3 Gbps. Any question pls not hesitate to contact us.E-mail:service@fiber-mart.com

What is SFP+ Direct Attach Copper Cable(DAC)?

 

In today’s market, Direct Attach Cables (DAC)provide an excellent pre-terminated and factory assembled & tested solution for both copper and fiber optic cabling in data centers. It is a kind of optical transceiver assembly widely applied in storage area network, data center, and high-performance computing connectivity etc. The DAC cables are used to connect one mobility access switch with another when forming a stack.

 

Direct-Attach Cables (DAC) are cost efficient close-range interconnection media widely used in telecom operator equipment rooms, data centers and corporate networks for connecting LAN and SAN equipment in same or neighboring racks. Our multi-vendor compatible Direct-Attach Cables portfolio support full range of transmission speeds from 10 Gbps up to 100 Gbps applications, customizable length of cables and current most popular interface assembly form factors – QSFP and SFP. Our multi-vendor compatible Direct-Attach Cables portfolio is compatible with 80% of networking equipment, where is not implemented a special algorithm for protection against third party modules. However – we can provide Direct-Attach Cables with custom-encoded firmware in order to make it work almost in any equipment and we can support encoding of each end to support different vendor equipment, allowing using Direct-Attach Cables as cross-platform interconnection medium.

 

SFP+ direct attach cable (DAC) is a fixed assembly that is purchased at a given length, with the SFP+ connector modules permanently attached to each end of the cable. SFP+ DAC provides high performance in 10 Gigabit Ethernet network applications, using an enhanced SFP+ connector to send 10 Gbps data through one paired transmitters and receivers over a thin twinax cable or fiber optic cable. The 10G SFP+ Cable is designed to use the same port as an optical transceiver, but compared with optical transceivers, the connector modules attached to the cable leave out the expensive optical lasers and other electronic components, thus achieving significant cost savings and power savings in short reach applications.

 

SFP+ DAC is a low cost alternative to traditional fiber and twisted-pair copper cabling in data center deployments. SFP+ DAC provides better cable management for high-density deployments and enhanced electrical characteristics for the most reliable signal transmission

DDAC

Passive and Active 10G SFP+ Direct Attach Cable (DAC)

SFP+ Direct Attach is known as the successor technology to 10GBASE-CX4. SFP+ Direct Attach, as implied in the name, uses SFP+ MSA and by using the inexpensive copper twinaxial cable with SFP+ connectors on both sides, provides 10 Gigabit Ethernet connectivity between devices with SFP+ interfaces. SFP+ Direct Attach has a 10 meter distance limitation, thus the target application is interconnection of top-of-rack switches with application servers and storage devices in a rack.

Passive cables are much less expensive but require the host to do the work of driving it properly.

Benefits:

  • Lower Costs
  • Higher Reliability
  • Lower Power Consumption
  • Plug and Play Simplicity

Fewer Components (No Active Tx /Rx Components)

Only Capacitors, Resistors, EEPROM, Cable

 

Tradeoffs:

  • Reduced Cable Flexibility
  • Reduced Modularity
  • Limited Distance
  • No LOS
  • No TX Disable
  • No Interrupts
  • Limited Management Interface
  • Host must drive Cu cable

 

Active cables offer the benefit of optical-module.

Benefits:

  • Enhanced Signal Integrity
  • Longer Cable Lengths
  • Transmit Pre-emphasis
  • Active/Adaptive Receive Equalization
  • Tx Disable
  • Loss of Signal (LOS)
  • Interrupts
  • Management Interface

 

Tradeoffs:

  • Higher price

 

Fiber-Mart supplies various kinds of high speed interconnect DAC cable assemblies. All of our direct attach cables can meet the ever growing need to cost-effectively deliver more bandwidth, and can be customized to meet different requirements. For more information, pls visit www.fibermart.com. pls not hesitate to contact us for any question:service@fiber-mart.com