Our CAT 7 data products meet all IEC/TIA standards for 10 Gbps Ethernet and provide the fastest possible data transmission speeds for copper based media.
Understanding Common Cable Construction for Data
Data has become the most valuable corporate asset. How to effectively transmit, store, access, protect and manage critical data is a challenge that has been conquered. For more than 30 years, Rockdale has remained focused on quality, service, innovation and value; providing our customers with products they can count on.
Ranging from 10 Mbps to 100 Gbps, Rockdale has the cable solution to support all of today’s standard-based application speeds. Our broad range of cable types and construction support installation in a wide variety of environments, including high flex cycling of robotics to noisy EMI of high voltage motors.
Before implementing, it is important to understand the most common cable construction types and their applications. Rockdale’s preferred cable terminology is outlined below and is based on IEC 61156-5: Multi-core and symmetrical pair/quad cables for digital communications.
The standard abbreviations are as follows:
U = Unshielded
F = Foil shielded
S = Braided shield
TP = Twisted pair
UTP: Unshielded Twisted Pair Four pairs of two insulated copper wires twisted around each other to reduce crosstalk or electromagnetic induction between the pairs. No metallic foil or braid is present. Most often used in data networks for short and medium connection lengths, and increasingly used in Closed-Circuit Television (CCTV) video applications.
F/UTP: Foiled Twisted Pair or Foil Applied Over Unshielded Twisted Pair Four pairs of two insulated copper wires twisted around each other to reduce crosstalk or electromagnetic induction between the pairs with an overall metallic foil wrapped around the pairs.
STP: Shielded Twisted Pair / ScTP: Screened Twisted Pair Four pairs of two insulated copper wires twisted around each other to reduce crosstalk orelectromagnetic induction between the pairs. An overall metallic braid is applied to the four pairs of wires.
SSTP or SFTP: Screened Shielded Twisted Pair or Screened Foiled Twisted Pair Four pairs of two insulated copper wires twisted around each other to reduce crosstalk or electromagnetic induction between the pairs. A metallic foil is applied to each pair of wires, with an overall metallic foil and/or braid wrapped around the four pairs. Virtually eliminates electrical noise from within the cable (crosstalk between cable pairs) and from outside the cable and between cables (EMI, radiation, electromagnetic induction, and RFI).
There are two types of connector for Cat 7A systems. The first is the version developed by Nexans (IEC 60603-7-71, also available from other manufacturers) and is known as the GG45. This type is backwards compatible with the RJ45 by the clever use of switch within the jack that changes the pole layout from 8 contacts in a line (as in the RJ45), to four pairs of contacts at the corners. Ingenious!
This means that the existing RJ45 type leads and hardware can be used on the cabling plant, and when the hardware is updated all that is required to go to full 1000MHz is to change the patch leads. This seems to be an ideal solution as they are capable of pair isolation for the emerging high-speed technologies. There is a wealth of information for the GG45 on the Nexans website.
The other type of connector is the 'non-backwards compatible' version often referred to as 'TERA' (IEC 61076-3-104). These have the contacts arranged as four pairs of contacts at the four corners to achieve maximum pair isolation.
The ISO recommends the GG45 as the preferred connector for Data Centre installations, but allows the 'TERA' to be used where cable sharing is more important than backwards compatibility.
Strict Specifications For Crosstalk
Category 7 cable (Cat7), (ISO/IEC 11801:2002 category 7/class F), is a cable standard for Ethernet and other interconnect technologies. CAT 7 is backwards compatible with traditional Cat5 and Cat6 Ethernet. Cat7 features even more strict specifications for cross talk and system noise than Cat6. Shielding has been added for individual wire pairs on the Category 7 cable.
Cat7 has been designed as a standard for Gigabit Ethernet over 100m of copper cabling The cable contains four twisted copper wire pairs, just like the earlier standards. Cat7 can be terminated either with 8P8C compatible GG45 electrical connectors which incorporate the 8P8C standard or with TERA connectors. When combined with GG45 or TERA connectors, Cat7 cable is rated for transmission frequencies of up to 600 MHz. Rockdale connectors are designed specifically for these high speeds without contact pins and a printed circuit board with contact pads integrated into the RJ45 style housing.
For Frequencies up to 1000MHz
Category 7a which is also commonly referred to as Augmented Category 7, operates at frequencies up to 1000 MHz. CAT7a is designed for multiple applications in a single cable including 40 Gigabit Ethernet, 100 Gigabit Ethernet, and CATV (862 MHz).[3). Test results have shown 40 Gigabit Ethernet will work up to 50 meters and 100 Gigabit Ethernet is possible up to 15 meters. Small form factor products are available from Rockdale in both copper and fibre optics for the 40GB and 100 GB applications.
10GBASE-T will soon be the norm.
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