Phone Punch Downs FREE cabling and networking Helpdesk
 Question by Scott Buckley posted 26 Sep 2001
 Phone Punch Downs
I need to punch down a single phone number to multiple cat 5e drops. What is the best block to use 66, 110 or something else. If you use a 110 do you just cross connect to the other locations from the inbound dial tone.
 Answer by Roman Kitaev posted 27 Sep 2001
Hi, Scott!

Use 110 block and bridge it.

The procedure looks like this:

(1) terminate your incoming phone line to 110 wiring block
(2) terminate your cat5e drops to 110 wiring block
(3) attach 110 connecting blocks using 110 punch-down tool
(4) run and terminate one piece of 2-pair cross-connect wire along the 110 connecting blocks, connecting the blue pairs. In this way you bridge (or parallel) your incoming line to multiple drops.

Please keep in mind that you can not bridge as many drops as you want. Below is the guidelines:

To determine the maximum number of analog devices that a single line can support, it is necessary to calculate the ringer equivalence for all the devices which will be connected to the line. The ringer equivalence of each device is marked on the unit. The total ringer equivalence of all the devices connected to a single line must be less
that 5.0, or else none of the devices will ring. Most new electronic phones have a ringer quivalence between 0.25 and 1.0, which allows from 5 to 20 phones to be plugged into a single line. Older phones with mechanical ringers generally have a ringer equivalent of 1, which would allow only 5 phones to be connected to one line.

Click here to see the expert's profile
Back to the current page of questions | Back to all the questions
Back to HELPDESK | Ask your question
Residential Cabling Guide

Home Cabling Guide

Finally, an instantly downloadable book that saves you thousands in home improvement dollars! Enjoy living in 21st century technology-advanced home while increasing its selling value and competitive advantage on the real estate market. Whether your cabling is for home office or high-tech leisure, you can wire your home yourself or learn "wirish" to speak with your cabling contractors in their language!

Learn more ...