PreCONNECT® OCTO FO cabling system

PreCONNECT® OCTO - Cost-effective parallel optics cabling

MTP®/MPO cabling system with 8 fibers per MTP®/MPO channel perfectly fitting for SR4 and DR4/PSM4 applications

PreCONNECT® OCTO is a comprehensive system for structured parallel optical data transmission cabling. By using 8 fibers for each MTP®/MPO connection, Rosenberger OSI has created a high-performance, efficient multifiber cabling product that optimizes results by reducing both costs and attenuation.

Cost savings through reduced fiber count

The 8-fiber design reduces costs by making optimum use of all the fibers. PreCONNECT® OCTO is backwards-compatible and can be integrated in existing network structures with duplex technology by means of MTP®/MPO harnesses.
The elimination of unnecessary interfaces and module cassettes also helps cut costs and reduces channel attenuation. The PreCONNECT® OCTO cabling system enables the optimization of the data transfer in network structures.

System consists of:

  • Factory assembled fiber optic breakout cables, FRNC-LSZH indoor cables, up to 192 fibers with connector systems MTP®/MPO 4+4 fiber OCTO per MTP®/MPO channel
  • MPO/MTP® Port-breakout with MTP® - LC and MTP® - MDC harnesses and MTP® module cassettes with LC and MDC front and MTP® - LC Port-Breakout-Units
  • Three 19“ panel systems SMAP-G2 SD, SMAP-G2 HD and SMAP-G2 UHD selectable
  • Suitable Patchcords
  • Useful accessories
  • Patch Location Rack


  • For all who already have on minimum one cabling side MPO 4 + 4 fiber based parallel optics SR4 and DR4/PSM4 transceivers
  • Cost and attenuation optimized for SR4 and DR4/PSM4 applications

Fields of application:

MTP®/MPO based Data Center cabling with 8 fibers per MPO 4 + 4 fiber channel

Optimized for parallel optics applications SR4 and PSM4/DR4:

  • 40/100/200 GBASE-SR4
  • 400GBASE-SR4.2 BiDi
  • 4x16 and 4x32 GFC
  • 100GBASE DR4/PSM4
  • 200GBASE-DR4
  • 400GBASE-DR4
  • 4x10 GBASE-LR
  • Easy migration to higher speed applications

Further information about the different applications can be found in the product information.

Do you have any questions about our systems? We will be happy to help you.

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  • MTP®/MPO cabling system perfectly fitting for SR4 and DR4/PSM4 applications
  • Cost reduction through the only for SR4 and DR4/PSM4 needed 8 fibers instead of the so far usual 12 are in one MTP®/MPO channel
  • Fast and safe installation trough factory assembled plug & play systematic
  • Highest quality and cost-efficiency through factory assembling
  • PreCONNECT® cabling systems consist of perfectly harmonized modular single components

Properties of individual system components

PreCONNECT® square-interface and installation protection:

Rosenberger OSI brought already 1991 high fibercount factory assembled Fiber Optic Trunk cables to the market. PreCONNECT® STANDARD was the first in Europe developed and manufactured, high fiber count and modular „plug-and-play“ FO cabling system and already 1997 we have been the first manufacturer of MTP®/MPO cabling systems in Europe.
PreCONNECT® OCTO Breakout-Trunks have PreCONNECT® square-interfaces on both sides which can be tool-less hooked into the 19” Panel Systems for tensile and torsion resistant fixing of the Trunks.
The Trunk connector legs are fitting for the 19“ panel systems and are packaged in non-pull resistant dust-proof foil tubes. On request with tensile strength, crush resistant, kink and torsion resistant, installation tubes deliverable.

Connector types:

  • OCTO breakout trunks: MTP® and MTP® PRO male 4+4 fiber OCTO
  • OCTO patchcords, multijumpers, harnesses and module cassettes: MTP® and MTP® PRO female 4+4 fiber OCTO 

Adapter types:

  • MTP®/MPO multimode: TIA type B “aligned key” „1 to 12“ grey
    MTP®/MPO singlemode TIA type A “opposed key” „1 to 1“ green
  • Description of the adapter types A and B see product information


  • OCTO breakout-trunks: TIA method B „1 to 12“
  • OCTO patchcords, harnesses and module cassettes: see product information

Cable types:

  • PreCONNECT® OCTO breakout-trunks: I-F(ZN)HH n x 8 fibers CPR class B2ca and I-F(ZN)HH n x 8 fibers CPR class Cca
  • PreCONNECT® OCTO patchcords and harnesses I-F(ZN)H and I-F(ZN)H(ZN)H 8 fibers
  • Cable data, see separate cable data sheets

Fiber types:

  • Multimode OM4 bend-insensitive for SR4
  • Singlemode G.657.A1 bend-insensitive and backwards compatible to G.652.D for PSM4
  • Fiber data, see separate fiber data sheets

Operating temperature range: Climate class C „indoor, controlled environment“ acc. to IEC 60753-1, -10°C to +60°C

Length definition: Order-length = length between the connectors of the longest legs at both sides, not between the PreCONNECT® square-interfaces.

Delivery form:

  • Dependent on the length as cable ring or on cardboard or wooden drum
  • Insertion loss and return loss measured acc. to IEC 61300-3-4, method B, MM 850/1300nm and SM 1310/1550nm, with measurement protocol
  • Product label with serial number at both sides


Patch Location Rack:


  • High-density data center infrastructures
  • For the construction of ultra-high-density data center patch locations


  • Innovative, restriction-free cable management system
  • Rack pillars with integrated cable managers to prevent interference with cable routing
  • The covers of the cable managers fold in both directions and are completely removable
  • Individually selectable feedthroughs in the sides and rear walls of the large-volume cable channel for simple vertical and horizontal cable routing
  • Professional routing of large cable volumes from the patchfields and storage of cable overlengths in the vertical cable managers
  • Particularly suitable for fiber optic cables thanks to the use of cable clips (L-fingers) and finger slots:
    - The rounded L-fingers ensure that the cables are extremely well protected against bending and kinking even when subject to strain.
    - The L-fingers do not have any sharp edges and are extremely strong and resistant to breakage. 
  • Because there is plenty of space for them in the large finger slots, the cables are neither squeezed nor kinked. 
  • The L-fingers retain the cables in the finger slots whenever you need to work with the covers folded back or removed.

Dimensions (H x L x W): 213 (46 HU) x 90 x 90 cm
Material and color: Powder-coated steel, RAL 9005 (black)
Optional: 19” Intermediate Rack for the construction of rack rows with uneven numbers of racks on request.

Product Overview and Resources