Wholesale network Crystal head | 8-core shielded metal shell Crystal head | 8p8c RJ45 eight core shell Crystal head

Wholesale network Crystal head | 8-core shielded metal shell Crystal head | 8p8c RJ45 eight core shell Crystal head

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0.23 CNY (0.04USD)
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Product parameters:

  • Brand: HQ
  • Type: Shielded crystal head
  • Process: injection / injection
  • Scope: network communications




Network five shielded crystal head 8P8C compliance shielded RJ45 network crystal head

Name: Network Shield Crystal Head Type: Super five-screen crystal head shield

Origin: Guangdong Province, China

Packing: 1000pcs / bag

Quality: The use of high-performance plastic, shrapnel repeatedly folded 25 times without breaking

product description:

RJ45 shielded crystal head, RJ45 socket module (crystal head) is based on international standards ISO / IEC11801 design and manufacture of excellent performance plug module.It can make Category 5 cable and 3 types of cable as the transmission medium of terminal equipment or server access wiring System, to ensure that the best in the state of data transmission.

product manual:

Meet or better than the current five transmission standards, in line with six and T568A and T568B line order requirements; gold-plated thickness of 6-30u; suitable for field termination; through field termination, to achieve the equipment or horizontal subsystem of mutual Then, easy to use.

· Connection with high-quality network cable provides the best conductivity, no data loss!


use: Widely used in digital communications with the level of twisted-pair cable, mainly used in integrated wiring system in the analog or digital communication equipment connection, HUB and server interconnect, voice, telephone, fax system wiring connection. The signal is stable within 100 meters.

(Cable line common sense)

568A standard: white green, green, white orange, blue, white blue, orange, white brown, brown
568B Standard: white orange, orange, white green, blue, white blue, green, white brown, brown

You can note that the difference between the two approaches is orange and green on the exchange only.

Line: both ends of the line are made according to the standard 568B (usually)
Reverse line: one end of the line by 568B production, the other end by 568A standard production


Cable there are two ways, one is the cross-line, one is parallel lines

Cross-line approach is:

One with 568A standard, one with 568B standard
Parallel line approach is:

Two with the 568A standard or 568B standard, (generally used are 568B parallel line approach)


If the status of both parties is not equal, use a parallel line, such as a computer connected to a router or switch
If the two devices connected are peer-to-peer, use a crossover cable, such as a computer to connect to the computer.

What situation with the line, what situation with the reverse line?

PC-PC: - - - - - - - - - Reverse (common)
PC-HUB: - - - - - - - - Line (common)
PC-SWITCH: - - - - - - - - line (common)
PC-ROUTER: - - - - - - - - Line (common)
HUB-HUB ordinary mouth: - - - - - - line
HUB-HUB level joint - cascade port: - - reverse line
HUB-HUB ordinary port - cascade: - - line
HUB-SWITCH: - - - - - - - Reverse line
HUB (cascade) -SWITCH: - - - line
SWITCH-SWITCH: - - - - - - Reverse line
SWITCH-ROUTER: - - - - - - Line (common)
ROUTER-ROUTER: - - - - - - Line

Production steps are as follows:

Step 1: Use the twisted wire to cut the required length of the twisted pair, at least 0.6 meters, up to no more than 100 meters, and then use the twisted pair stripper (the actual use of what can be cut)

The twisted pair of cables is covered with a soft nylon rope. If you are stripping the sheath of the twisted pair, it is felt that the exposed part is too short,

For RJ-45 connector, you can hold the twisted pair of skin, and then pinch the nylon line to the bottom of the skin peel, you can get a long bare line.

Step 2: Twisted-pair cable after stripping.

Step 3: The next line of operation will be directed to the bare twisted pair in the orange line to the front of their own, brown line to their own direction, green line off to the left, blue

On the line stripped to the right. On: Orange Left: Green Under: Brown Right: Blue

Step 4: Place the green on-line with blue on the center line, and the orange on-line and brown on the line remain fixed, that is, on the outer position.

Left: orange left two: green left three: blue left four: brown
Step 5: Carefully peel each pair of wires, as we follow the EIA / TIA 568B standard to make connectors, so there is a certain order of the color of the line.

It is important to note that the green bar should cross the blue line. The easiest place to make mistakes here is to place the white-green line next to the green line, which can cause crosstalk,

From the left: white orange / orange / white green / blue / white / blue / green / white brown / brown Common error is connected to the green line 4 feet position.

It should be true that the green line should be placed at the 6th foot position because the 3rd and 6th legs are the same pair in the 100BaseT network.

EIA / TIA 568B) From left: White Orange / Orange / White Green / Green / White Blue / Blue / White Brown / Brown
Step 6: Cut the exposed twisted pair with scissors or diagonal pliers, leaving only about 14 mm in length. This length is for EIA / TIA compliance.

RJ-45 connector and twisted pair production standard introduction.Finally twisted pair of each line in turn into the RJ-45 connector pin, the first pin should be put white orange line, The rest analogy

Step 7: After confirming that each wire of the twisted pair cable has been correctly positioned, you can crimp the RJ-45 connector with RJ-45 crimping pliers. There is also a protective cover for RJ-

You can prevent the connector in the pull caused by poor contact with the use of this protective cover, you need to crimp RJ-45 connector before the plastic sleeve on the twisted pair cable.

Step 8: Repeat Step 2 to Step 7 to create the RJ-45 connector on the other end. Because the workstation is directly connected to the hub, the other end of the RJ-45 connector is fully connected

After completion of the cable at both ends of the RJ-45 connector regardless of pin and color are completely ~ this connection method for ADSL MODEM and computer network card connection between the computer and the line

(Switch) to complete the RJ45 connector.

Crossover cable for ADSL MODEM and hub HUB connection (with the MODEM design, not all), HUB and HUB not through the connection between the level of mouth, and the two computing

Machine directly connected through the network card. Production methods and the above is basically the same, but not online sequence 568B, using the 1-3, 2-6 exchange mode, that is, a 568B production, another one

Head using 568A production.

New knowledge of network cabling engineering -

What is the difference between Category 6 and Category 5 cables?

'Super five' refers to the ultra-five unshielded twisted pair (UTP-Unshielded Twisted Pair)
Unshielded twisted pair cables are made up of pairs of twisted pairs and a plastic sheath, and Category V refers to five different quality levels defined by the International Electrical Industry Association for twisted pair cables.

Ultra-five unshielded twisted pair is in the existing five types of shielded twisted-pair part of the performance to be improved after the cable, many performance parameters, such as near-end crosstalk, attenuation crosstalk ratio, return loss, etc. have But its transmission bandwidth is still 100MHz.

Ultra-five twisted pair is also used on a pair of 4 and a pull-line, the color of the pairs of twisted pair with five identical, respectively, white, orange, white, green, white, blue, white Brown and brown.The diameter of the bare copper wire is 0.51mm (wire gauge is 24AWG), the insulated wire diameter is 0.92mm, and the UTP cable diameter is 5mm.

Although ultra-five types of unshielded twisted-pair can provide up to 1000Mb / s transmission bandwidth, but often need the help of expensive special equipment support.Therefore, usually only be used in 100Mb / s Fast Ethernet to achieve desktop switches To the computer connection.If you are not ready to upgrade the network to Gigabit Ethernet later, you may wish to use in the horizontal cabling over five unshielded twisted pair.

'Six' refers to six types of unshielded twisted pair
Six types of unshielded twisted pair of the various parameters have increased substantially, the bandwidth is also extended to 250MHz or higher.Two twisted pair in appearance and structure with five or five types of twisted-pair have a certain Difference, not only to increase the insulation of the cross skeleton, the twisted pair of four pairs of lines were placed in four cross-skeleton groove, and the cable diameter is also more coarse.
The center cross-skeleton of the cable with the length of the rotation angle, the four pairs of twisted-pair card in the skeleton of the groove, to maintain the relative position of the four pairs of twisted-pair to improve the balance of cable characteristics and crosstalk attenuation.In addition, The balanced structure of the cable during the installation process is not damaged. The six types of unshielded twisted pair bare copper wire diameter 0.57mm (wire gauge 23AWG), insulation diameter of 1.02mm, UTP cable diameter of 6.53mm.

Ultra-five or six categories

According to the different electrical properties, twisted pair can be divided into three categories, five, five, six and seven twisted-pair. Different types of twisted-pair price difference is even greater disparity, the same.

In addition to the traditional voice system is still using three types of twisted-pair, the network cabling is now basically in the use of ultra-five or six types of unshielded twisted pair.Although five types of unshielded twisted pair can still support 1000Base-T, but As in the price and ultra-five unshielded twisted pair is almost the same, therefore, has gradually faded out of the wiring market.

Six types of unshielded twisted pair Although the higher prices, but with the super-five cabling system has very good compatibility, and can very well support 1000Base-T, it is slowly becoming the new darling of integrated wiring. Because the twisted pair is a new cabling system, although the performance is excellent, but because of expensive. Construction of complex and less choice of products, so rarely used in the wiring project.

Six types of unshielded twisted pair can be very good to support Gigabit Ethernet and 100m transmission distance.Therefore, six types of cabling system is widely used sub-server room wiring, and retain the upgrade to Gigabit Ethernet capabilities Cabling system. According to the international cabling standard ISO 11801, cabling system life expectancy of at least 10 years.As a long-term basic investment, integrated wiring should take full account of the potential needs of the network and wiring system development, , The proposed selection of six products to build wiring system.

If you consider the future application needs of the network, theoretically should install the most advanced cabling products, because the installation of cable is often difficult to re-update replacement, basically, a cabling system to use at least 10 years as a standard, to support 4-5 generation network Device performance updates, if future network equipment requires a better cable to improve data speed.

However, these cable re-engineering is very expensive, so even if the price of six categories of products relative to the ultra-five products a little expensive, but in order to reduce future network upgrade issues, Six categories of products are still worth considering.

'Super six categories'
Belden IBDN developed a high-performance cabling system that was designed to operate above 40 ° C. The IBDN 4800LX system was officially launched at the end of 1999, with a final bandwidth of 300 MHz and a rating of 6 at 50 ° C ℃ performance index.In order to distinguish it from the ordinary 6-class cabling system, this bandwidth performance far exceeds Category 6 wiring called super-6 class.
Most of the Class 6 cabling uses the same modules and jumpers as the same brand of Category 6 cabling, so their main difference is on the cable. IBDN's Super 6 Cable 4800LX from the beginning of the target set at a higher Temperature is normal operation, so one of the characteristics of its cable structure is the large diameter, transmission conductor diameter from the ordinary 6 class 0.5mm (24AWG) increased to 0.6mm (23AWG); there are some manufacturers in the beginning of the super 6 The cable uses 24AWG to try to improve the NEXT method, but adds the wire diameter to 23AWG by the improved cable in 2002. Another feature is the addition of a cross-shaped pair of dividers between four twisted pair Without a cross, a pair of wires in the cable may be trapped in the gap between the two wires, and the spacing between the pairs is reduced to increase the crosstalk problem, and the divider is accompanied by a 4% The wire is tightly fixed in its design position, and can reduce the cable bending caused by the loose line, and thus reduce the performance of the installation of the reduction. 4800LX is the first crossbar with the super 6 cable, The subsequent cables were modeled and similar techniques were used.

Purchase Notes
  • 1, manufacturers supply genuine

    Manufacturers first-hand sources, the company short production cycle, the quality of goods quality assurance.

  • 2, on the size specifications

    Site size is only for reference, specifications for manual measurement, due to measurement tools and measurement methods are different and other factors, there will be some errors, do not accept a little error buyers please carefully purchase orders, words first, independent shopping, fair and impartial.

  • 3, on the color

    OUR goods are in-kind shooting, the color of the school by professional proofreading, and physical tile the most close, because the computer monitor color contrast and color temperature are different and so on.

  • 4, on customer service

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  • 5, on the sale

    First, the non-product quality problems arising from the return:

    Refers to the customer has paid and has received the goods, but because of their own reasons do not need to order the product returns, returned products must be within 7 days of receipt of the goods, replacement products must communicate with customer service, The goods must be returned within 15 days of receipt of the product, more than the time limit of the goods or returned goods packaging and appearance of artificial damage, we will not be returned if the product itself to carry the product serial number And we sold the discrepancy, damaged items, or scratched the security that has been verified, or damaged packaging or goods, or with the goods with the warranty card, accessories, etc., are not returned. If there are special circumstances, we have The right to specific circumstances as a concrete solution. Return shipping costs borne by the buyer.

  • Product warranty for more than 7 days, the mouse and keyboard products warranty for six months, other products warranty 3-6 months, mouse pads and other vulnerable items will not provide warranty, each product are affixed with fragile warranty label, , Label tear can not be guaranteed. If the product warranty quality problems (non-human damage in the case) Buyers can accumulate the way, and other bad items accumulated to a certain amount after a one-time back to change, for a good product can also be ordered in the next time together with the order of the goods together in the past. (The company is not responsible for the return shipping products, customers need to pay.)

    Second, due to the product itself caused by the return policy:
    The quality of the goods themselves, must hold the official quality inspection report, within 7 days of receipt of the goods will test the report of the goods and their accompanying warranty card, accessories and other complete return to my company to confirm before returning! (Compatibility of the product is not within the scope of after-sale!) Product quality problems caused by the return shipping costs borne by the Company!

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  • 6, on the delivery

  • (If you can not specify or need to specify the logistics, you must contact with the customer service or message. Not due to the designation of the number of items can not be received or To the designated location, the shop to pay the freight borne by the buyer. Shipping EMS is sent postal economy Express.
  • About delivery:

    2. Select the logistics of the customer, the seller directly to the freight fill '0' logistics costs when the buyer to pay! General default Jiagei, Debon logistics, heaven and earth Arima logistics or other green logistics!

  • 1. Guangdong Province, the wholesale customer recommended delivery logistics: Yongqing - Shunda of intellectual - rich days - spike Hong Kong - Mastery - auspicious - Volkswagen - Xiangcheng - Jinwei - new domain - every day - Anjie - Guanglian - Minquan - Shun - Flying - United City - New Mileage - China Post - Wing Fat - Rongshun - Gundam - Haihong - New Oriental - Athlon - Huaxing - Dongsheng - Brother - Weiyuan - and so on.

    2. Overseas wholesale customers can choose: Debang - heaven and earth Arima - Jiangui - new state - Guihua - Tianbao - ambitious - Chinese - Guangxiang - City Star - Wanfa - Kang Xiang - Huarong Guangda - Sheng Hui - Guangfu - Guangdong Fu logistics and so on


    3. 'Logistics' shipping model: usually in (box) units for the calculation, a box of goods sent to all parts of the country, usually generally in 20-60 yuan range (direct access does not include transit to secondary cities and tertiary cities)' specific To pay the goods at the time of payment. 'After the arrival of the logistics business will be notified by the delivery of goods receipt buyers. Please buyers at the same time to carry the identity card to the designated location from the mention. Will pay the relevant freight costs. Online inquiry, only telephone inquiries. After delivery we will fill in the delivery point of the phone. Please call the number of consultation number and unloading point of telephone and address. We generally arrive in the 2-5 days after delivery arrived (the specific arrival time is Quasi). Reminder: I suggest you receive the goods when the face inspection, in the event of a problem when the goods directly refused or let the staff sent to the receipt of the goods on the receipt of the goods and signed, to avoid the logistics You are having trouble with you.

  • > Buyer Information

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    As a result of a classification of goods, there may not be timely updates, there may be different specifications, please buyers to the site 'product specifications' section description shall prevail.

    > Shipping matters

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    Special Tips: Taking into account around the courier and logistics company personnel service standards vary, there may be courier or logistics company refused to buyer after the first inspection of the sign situation .We strongly recommend that you: with the local courier or logistics company personnel consultations , After the signing of a single transport, not to courier or logistics company personnel, in front of courier or logistics company personnel check and check well.

    Product Rework:

    1. If the product quality problems (non-human damage in the case), the buyer can accumulate the way, and other bad items accumulated to a certain amount after a one-time back to exchange for a good product can also be the next order When the goods together with the order back together.

    2. We need to repair the product, please fill in the correct (specify the contact name, address, telephone and product issues), we will fill in accordance with the address you return to the product to you.

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    Replacement problem:

    1. Different products, have the appropriate warranty period (usually 3 months to 1 year warranty.) In the warranty period, such as quality problems, non-human damage, you can replace the new (depending on the extent of product appearance damage The warranty period shall be affixed to

    Warranty label on the product validity period shall prevail (Note: During the warranty period, the warranty label please keep clear, complete and no one is damaged).

    2. Customer unmarketable products, such as the need for Returns (the premise must be returned to the goods to be intact, no signs of damage or wear), the customer must receive the goods within 15 days after contact with our staff To solve the processing, more than the specified time, the product is not quality problems, not Returns.

    3. Man-made damage, packaging damaged, non-returnable, special circumstances can be negotiated.

    4. The buyer has just received the product found a problem (such as: product model is not, less accessories, etc. ... ... need to sign within 24 hours after contact us

    Transaction description

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    1, the purchase of a small amount of one-item items can be directly photographed remittance to Alipay, without notice, the owner will be registered in accordance with the information you ship in a timely manner; if the freight is not enough, the owner will notify you to make up online shipping freight.

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    10, warranty and aftermarket (five-star)
    In the shop receipt date, 3 days of quality problems, please contact the owner, the shop can be free of return postage to the buyer to replace the new product, within 3 months of quality problems to pay the postage, 3 months later Buyers bear the back and forth warranty postage.

















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