MTP Cable, MPO Cable - Use for 40G to 400G Data Center

As we know, from 40G to 400G network connections to deal with in data centers, conventional dual-fiber patch cables like LC cable can no longer meet the demands. To solve this problem, Fibermart MTP/MPO cables accommodating more fibers in one multi-fiber MTP/MPO connector came into the market, which support to be practical solutions for 40G/100G/400G high-density cabling in data centers.

This article was going to introduce different Fiber-MART.COM MTP/MPO cable types and their applications in 40G and 400G data centers.

MTP/MPO Cable Overview

MPO (Multi-Fiber Push-on) is the first generation of clip clamping multi-core optical fiber connector. MTP® is a registered trademark of US Conec Ltd. , which is an advanced version of MPO, with better mechanical and optical performance. They look alike and are completely compatible and intermateable. MTP cables are composed of MTP/MPO connectors and optical fibers. MTP/MPO connectors have a female type (without pins) or a male one (with pins) as shown in Figure 1. The position of guide grooves also results in “Key Up” and “Key Down” MTP/MPO connectors. And a white dot is for identifying fiber position in connectors. MTP/MPO connectors largely increase the cable density and save circuit card and rack space, which are well suited for current 40G/100G cabling and future network speed upgrades.

Figure 1: MTP/MPO Connector Structure.

MTP/MPO Cable Solutions

A variety of MTP/MPO cables are available for different application environments and requirements based on functions, polarity, fiber count, fiber mode and jacket rating.

By Function

MTP/MPO trunk cables, MTP/MPO breakout cables and MTP/MPO conversion cables are ideal for high density cabling network, offering better network capacity and flexibility. MTP Trunk Cable, MTP breakout Cable

MTP/MPO Trunk Cables

MTP/MPO trunk cables are terminated with an MTP/MPO connector (female/male) on both ends, which are available in 8-144 fiber counts for users’ choices. Typically, these multi-fiber MTP/MPO trunk cables are ideal for creating a structured cabling system, including backbone and horizontal interconnections such as 40G-40G and 100G-100G direct connections, so as to achieve a simple and efficient high-performance networking.

Figure 2: 40G-40G Direct Connection with MTP/MPO Trunk Cable.

MTP/MPO Breakout Cables

MTP/MPO breakout cables (aka. harness cables or fanout cables) are terminated with a female/male MTP/MPO connector on one end and 4/6/8/12 duplex LC/FC/SC/ST connectors on the other end, such as 8-fiber MTP/MPO to 4 LC harness cables and 12-fiber MTP/MPO to 6 LC harness cables. Typically, these breakout cables are ideal for short-range 10G-40G and 25G-100G direct connections or for connecting backbone assemblies to a rack system in the high-density backbone cabling.

Figure 3: 25G-100G Direct Connection with MTP/MPO Breakout Cable.

MTP/MPO Conversion Cables

MTP/MPO conversion cables have the same fanout design as MTP/MPO breakout cables but are different in fiber counts and types. They are terminated with MTP/MPO connectors on both ends. Specifically, commonly-used ones are 24-fiber to 2×12-fiber, 24-fiber to 3×8-fiber, 2×12-fiber to 3×8-fiber MTP/MPO conversion cables. They are especially ideal for 10G-40G, 40G-40G, 40G-100G, 40G-120G connections, which eliminate fiber wasting and largely increase the flexibility of the existing 12-fiber and 24-fiber MTP/MPO cabling system.

Figure 4: 40G-120G Direct Connection with MTP/MPO Conversion Cable.

By Polarity

Polarity refers to the matching of the optical transmitter and receiver at both ends of a fiber link. In traditional cabling systems, connectors like LC/ SC can be easily matched, so there is no polarity issue. However, due to the special design of MTP/MPO connectors, polarity issues must be addressed in high-density MTP/MPO cabling systems. To ensure proper polarity, the TIA 568 standard defined three connectivity methods called Method A, Method B, Method C. So there are Type A, Type B and Type C MTP/MPO cables with different structures according to these methods. These MTP/MPO cables usually connect with different MTP/MPO cassettes and fiber patch cables to ensure the right polarity of the optical circuit. Read the white paper Understanding MTP/MPO Cable Polarity for more information about common 8/12/24-fiber MTP/MPO cable polarity and connectivity methods.

Figure 5: 12-Fiber MTP/MPO Cable Polarity.

Conclusion

Fibermart MTP/MPO cables are well-received for high-density cabling in data centers, as they are capable of accommodating multi fibers within a single interface, which largely increases network capacity, saves much space and offers ease of cable management. With a variety of MTP cables available in terms of cable function, polarity, fiber count, fiber mode and jacket rating, it would be better to consider specific needs when choosing suitable MTP/MPO cable solutions.