The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by bigpapa
Yesterday at 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 15
HotLine1 10
Trumpy 8
Texas_Ranger 8
sparkyinak 7
Who's Online
0 registered (), 106 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#191142 - 12/19/09 02:08 AM what is "two line over line" telephone wiring?
bigpapa Offline
Member

Registered: 03/18/06
Posts: 77
Loc: canada
What does this term mean when referring to telephone cabling?


Edited by bigpapa (12/19/09 02:10 AM)

Top
Study Guides for VDV / Structured Cabling Installers
#191159 - 12/19/09 05:18 PM Re: what is "two line over line" telephone wiring? [Re: bigpapa]
EV607797 Offline
Member

Registered: 10/25/06
Posts: 756
Loc: Fredericksburg, VA, USA
Never heard of it and I'm in the phone business. Sounds like maybe someone trying to describe ISDN-BRI or DSL. Either way, it just uses standard twisted pair wiring, CAT3 is more than sufficient for these services.
_________________________
---Ed---

"But the guy at Home Depot said it would work."

Top
#191256 - 12/23/09 02:31 AM Re: what is "two line over line" telephone wiring? [Re: EV607797]
mhulbert Offline
Member

Registered: 10/19/04
Posts: 133
Loc: Anaheim, CA USA
Sounds like a "pair gain" term.
Read some stuff about it here: http://en.wikipedia.org/wiki/Pair_gain
They don't mention a "DAML" which I've run across. I'd guess it's a Digital multiplexor. Basically you get one pair from the CO, and it gives you 2 POTS lines. Careful, the pair from the CO has 100+ VDC on it!

Top
#194386 - 05/28/10 05:46 PM Re: what is "two line over line" telephone wiring? [Re: mhulbert]
Tiger1vic Offline
New Member

Registered: 05/28/10
Posts: 6
Loc: Canada
An "overline" is telco terminology for an additional phone number on the same line - as in when a business has 2 lines but only one receptionist. Both numbers ring on the same phone.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals