标签归档:MTP fiber cable

8-Fiber MTP VS. 12-Fiber MTP Cables

MTP fiber cable in data center becomes increasingly popular in data center with the wide deployment of 40G and 100G network. It is common that 40G and 100G network usually based on 12-fiber MTP networking system. However, not all the 12 fibers of MTP cable are used.8-fiber MTP cable

12-Fiber MTP Cable During Transmission

There are usually 4 fibers left unused, if you are using a 12-fiber MTP cable to transmit 40G with QSFP+ module or 100G with QSFP28 module. The following shows how 12-fiber MTP fiber cable works when it is used to be connected with 40Gbase-SR4 QSFP+ module. If more 12-fiber MTP cables are used, more optical fibers will be wasted. As IEEE standards like 40GBASE-SR4 and 40GBASE-SR10 uses only 8 fibers for dual-way transmission, manufacturers provide new versions of MTP fiber cable which contains only 8 optical fibers but still used the standard MTP interfaces.40gbase-sr4

Base-8 MTP for Higher Density and Lower Utilization

Network built with 8-fiber MTP system can transmit the same data with less cost and higher density compared with 12-fiber MTP system. All fiber will be 100% utilized in base-8 MTP products. It could be a cost-effect solution for both 40G to 40G transmission and 40G to 10G transmission. 8-fiber MTP trunk cables and 8-fiber MTP-LC harness cable are already provided in the market. There are also rack designed 8-Fiber MTP breakout panels for 40G to 10G applications.

MTP-LC-harness-cable MTP-LC-harness-cable
MTP-LC Harness Cable MTP-LC 40/100G Breakout Panel

Convert 12-Fiber MTP to 8-Fiber MTP Cabling System

However, most MTP cabling systems are based on 12-fiber or 24-fiber MTP system, especially for backbone cabling. MTP conversion cables are provided in the market which offer conversion between 12/24-fiber MTP and 8-fiber MTP cabling systems. The following shows two types of 8-fiber MTP conversion cables which can provide 12-fiber to 8-fiber MTP conversion and 24-fiber to 8-fiber MTP conversion separately.

24 to 8 fiber MTP conversion cable 12 to 8 fiber MTP conversion cable
1*3 MTP Conversion Cable 2*3 MTP Conversion Cable

If you have already deployed 12-fiber MTP cabling system in your data center, 2*3 MTP conversion cable is suggested to be used. With one end terminated with two 12-fiber MTP cable and the other end terminated with three 8-fiber MTP connectors, 12-fiber to 8-fiber MTP cabling conversion could be achieved, as well as 100% optical fiber utilization in 12-fiber MTP system.

1*3 MTP conversion cable has a 24-fiber MTP cable on one end and three 8-fiber MTP cable on the other end. With this cable, a length of 24-fiber MTP cable can provide three ways of 40G signal dual-way transmission. All the fibers in a 24-fiber cabling system cable be used.

Conclusion

It is clear that the 8-fiber, 12-fiber based and 2-fiber based cabling system will exist for a long term in 40/100G network. 8-fiber MTP cabling system can provide higher optical fiber utilization with lower cost and higher cabling density. If you want to transfer 12-fiber MTP system to 8-fiber MTP system, you can use MTP conversion cables. 8-base MTP system, could be regarded as an additional option for the existing fiber network infrastructure.

MTP Conversion Cable and Its Usage

12-fiber MTP and 24-fiber MTP cables are widely used in 40G and 100G high density cabling. However, in many cases, not all the fibers are used. For instance, to connect a 40G-SR4 QSFP+ module, we usually use a 12-fiber MTP cable with only 8 fibers in use. If you have built a 24-fiber cabling system, you can use MTP conversion cable to make full use of the existing optical fibers.

MTP conversion cable

MTP Conversion Cable

Unlike MTP-LC harness cable, MTP conversion cables are terminated with MTP connectors on both ends. However, the MTP connectors on each end are different in fiber counts and types. MTP conversion cable can provide more possibilities for the existing 24-fiber cabling system. The following are the most commonly used MTP conversion cable:

1*2 MTP conversion cable 2*3 MTP conversion cable 1*3 MTP conversion cable
1*2 MTP conversion cable 2*3 MTP conversion cable 1*3 MTP conversion cable
24-Fiber MTP to 2*12-Fiber MTP 2*12-Fiber MTP to 3*8-Fiber MTP 24-Fiber MTP to 3*8-Fiber MTP
MTP Conversion Cable Application

The total fiber counts of the above three MTP conversion cables are all 24. But the can provide different connections in multi-fiber cabling system. The following will introduce the applications of these cables.

1*2 MTP Conversion Cable

This MTP conversion cable has one end terminated with a 24-fiber MTP connector and the other end terminated with two 12-fiber MTP connector. With this cable, two 12-fiber optical singles can be transferred on to a 24-fiber cable for transmission. In multimode cabling system, the optical signals of two 40G-SR4 QSFP+ modules can be transmitted over a single 24-fiber MTP cable as shown in the following picture.

1*2 MTP conversion cable
1*3 MTP Conversion Cable

1*3 MTP conversion cable has one 24-fiber MTP connector terminated on one end and three 8-fiber MTP connector one the other end. The 8-fiber MTP connectors can be connected to 40G-SR4 QSFP+ modules. This MTP conversion cable utilizes 100% of the existing 24 optical fibers. Each fiber can be used to transmit 10G optical data. Three 40G dual-way transmissions can be achieved on the existing 24-fiber MTP cable. It can also be used to breakout the 120G CXP module signals into three 40G QSFP+ SR4 optical signals.

1*3 MTP conversion cable
2*3 MTP Conversion Cable

2*3 MTP conversion cable is terminated with two 12-fiber MTP connectors and three 8-fiber MTP connectors. This MTP conversion cable allows three 40G-SR4 optical signal transmit on the existing two 12-fiber MTP trunk cables as shown in the following. If you have built a 12-fiber MTP cabling system. This 2*3 MTP conversion cable can increase about 30% capacity of the existing network.

2*3 MTP conversion cable

MTP Conversion Cable Selection

MTP conversion cables are designed to provide a more flexible multi-fiber cabling system based on MTP products. It can largely increase the capacity of the existing 12-fiber and 24-fiber MTP network. The above mentioned MTP conversion cable in different fiber types and cable lengths. Kindly contact sales@fs.com for more details if you are interested.