|
Joined: Jan 2005
Posts: 264 Likes: 1
Member
|
OP
Member
Joined: Jan 2005
Posts: 264 Likes: 1 |
I'm mainly a computer tech, but I'm learning phone systems...
The other day one of our installers tried to install a KSU, but the client's site was wired very poorly. To top if off there were lightning storms in the area. Needless to say they stopped the install.
When they were left site, the original house analog phones could pickup a dial tone and dial, but could not answer an incoming call. When they would pick up the incoming call there would be dead air.
I think this is purely a Verizon issue, but the Verizon tech pointed the finger at my guy. Could this be caused by my guy a splitting a pair? Such as having an analog phone hooked to the TIP of L1 and RING of L2?
I tried to duplicate this with a butt set and I was unable. What happens if you mix the TIP of 1 line with the RING of another line (or vice versa)?
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
|
Joined: Jan 2005
Posts: 15,378 Likes: 13
Moderator-Vertical, Vodavi, 1A2, Outside Wire
|
Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,378 Likes: 13 |
What you are experiencing is exactly what happens with a split pair scenario. The call is ringing in on the correct "ring" wire, but the set is not connected to the correct "tip" wire to answer the call.
It sounds like your guys checked for dial tone when they left, which you will get even with a split pair. I think it's safe to assume that your guys had something to do with it.
Ed Vaughn, MBSWWYPBX
|
|
|
|
Joined: Jan 2005
Posts: 264 Likes: 1
Member
|
OP
Member
Joined: Jan 2005
Posts: 264 Likes: 1 |
DOH!
When I tried to get dial tone on a split pair at my office I couldn't do it. I just got dead air. Is that because the polarity check on my butt set?
|
|
|
|
Joined: Jan 2005
Posts: 15,378 Likes: 13
Moderator-Vertical, Vodavi, 1A2, Outside Wire
|
Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,378 Likes: 13 |
No, polarity doesn't matter with a butt set. It depends upon how the lines are brought to the service area. If they arrive over traditional copper, you will get what is happening at the site, but the lines will be noisy. If they are being served by pair gain equipment, you will probably get the same thing without the hum. Then again, different pair gain electronics behave in different ways, so yours may be from equipment that won't provide dial tone on split pairs.
In general, the tip side of the line eventually ends up grounded in the central office. The ring side of the line carries all of the "business", like ringing voltage, the phone number itself, etc. You can even connect a butt set from the ring side of the line to a ground and get a working line, albeit noisy.
Ed Vaughn, MBSWWYPBX
|
|
|
|
Joined: Jan 2005
Posts: 264 Likes: 1
Member
|
OP
Member
Joined: Jan 2005
Posts: 264 Likes: 1 |
Come to think of it.. Our office has Verizon Centrex lines. That could be the difference you are referring to.
Thanks for your quick replies! This telecom newbie appreciates it.
|
|
|
|
Joined: Mar 2002
Posts: 411
Member
|
Member
Joined: Mar 2002
Posts: 411 |
Centrex is a billing/programming differentiation, the dialtone and everything else is the same.
|
|
|
Forums84
Topics94,262
Posts638,696
Members49,757
|
Most Online5,661 May 23rd, 2018
|
|
3 members (Yoda, Toner, Curlycord),
135
guests, and
240
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
|