Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I just finished re-wiring my workplace's new office, and noticed that many of the phone jacks in the walls were wired to use the 3, 4 wires in the jack, instead of the middle two. The middle most 2 wires were not hooked up, while the next two out from the middle were.

What would the use of this be? Maybe a special Voip setup? It was really odd to see...

share|improve this question
add comment

closed as off topic by Sathya, ChrisF, Diago Sep 25 '10 at 11:19

Questions on Super User are expected to relate to computer software or computer hardware within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

1 Answer

Some proprietary KSU or PBX systems use 3 and 4, but it seems unusual that the inner pair is not also wired. Are you in the US or elsewhere? What kind of phone system is/was in use?

share|improve this answer
    
In the USA. The previous tenants had several large rooms for call centers/support and they were all wired this way. I don't know what equipment they had at all though. –  BLueSS Sep 24 '10 at 20:31
add comment

Not the answer you're looking for? Browse other questions tagged or ask your own question.