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what is "two line over line" telephone wiring? #191142
12/19/09 06:08 AM
12/19/09 06:08 AM
bigpapa  Offline OP
Joined: Mar 2006
Posts: 81
What does this term mean when referring to telephone cabling?

Last edited by bigpapa; 12/19/09 06:10 AM.
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Re: what is "two line over line" telephone wiring? [Re: bigpapa] #191159
12/19/09 09:18 PM
12/19/09 09:18 PM
EV607797  Offline
Joined: Oct 2006
Posts: 745
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.


"But the guy at Home Depot said it would work."
Re: what is "two line over line" telephone wiring? [Re: EV607797] #191256
12/23/09 06:31 AM
12/23/09 06:31 AM
mhulbert  Offline
Joined: Oct 2004
Posts: 132
Anaheim, CA USA
Sounds like a "pair gain" term.
Read some stuff about it here:
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!

Re: what is "two line over line" telephone wiring? [Re: mhulbert] #194386
05/28/10 08:46 PM
05/28/10 08:46 PM
Tiger1vic  Offline
New Member
Joined: May 2010
Posts: 6
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.


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