Think You Know Jack
Plug vs. Jack in Security Installations
In the cover article of BICSI News January/February issue, entitled “Bending Cabling Standards for IP-based Security Surveillance,” Berk-Tek broaches the topic of the plug-ended horizontal runs for security installations. This has stirred up quite a bit of debate in the cabling industry.
- If there is a strain relief (boot), slide it on the cable
- Trim off 1” to 1 ½ of the jacket and untwist the pairs
- Align the conductors to match the proper color layout for either TIA-568A or 568B, depending on the other end of the termination in the TR
- If there is a load bar or management bar, trim the conductors at a slight angle. If no load bar, evenly cut straight across (to make it easier to load in)
- Line up the conductors on the load bar and trim the excess wire once pushed through. There should be no more than a total of ½” of untwisted wire from the tip of the housing to the cable jacket
- Make sure that all conductors touch the end of the housing and are visible when looking thru the end of the housing
- If there is a strain relief, slide up to the rear of the plug housing
- Using the manufacturers’ recommended crimp tool, crimp the plug into place. This is a critical step because if done incorrectly the wires can become loose and lose end to end contact.
- Step one – Calibration. Calibrate the tester following the on-screen prompts using either the included patch cords (category 6A F/FTP) or with high quality, factory made Category 6 or better cords and follow the manufacturers' specifications.
- Step 2 – Attaching the tester to the “channel.” Attach the tester on both ends of the horizontal run. In the TR, set up the tester patch cord into the patch panel jack. On the camera side, attach the remote handset directly to the plug at the end of the horizontal cable.
- Step 3 – Test. Set the tester to “permanent link” (versus a channel test) because you will need to get a read of the plug termination. Select either Category 5e or 6 to match the grade of installed cabling. (Note: If you tested a channel then you actually might get an increase in cable/channel performance as it will cancel out the patch cords that occurred in the calibration.)
- Step 4 – Test results. The autotest will give you a “pass” or “fail.” If NEXT or PSNEXT fails at the camera side (Remote Handset) replace the plug at the end of the “channel”.