Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On 5/7/2011 4:03 PM, Jim Thompson wrote:
Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Some one may be working at the CO.

Moving a rack or something.

I was this when I got DSL.

My Caller ID box went berserk over this for days, then it stopped.

hamilton

On 5/7/2011 4:03 PM, Jim Thompson wrote:
Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Some one may be working at the CO.

Moving a rack or something.

It was like this when I got DSL.

My Caller ID box went berserk over this for days, then it stopped.

hamilton

On Sat, 07 May 2011 16:11:52 -0600, hamilton
wrote:

On 5/7/2011 4:03 PM, Jim Thompson wrote:
Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Some one may be working at the CO.

Moving a rack or something.

I was this when I got DSL.

My Caller ID box went berserk over this for days, then it stopped.

hamilton

This is deadly on 30 minute intervals. I even was able to set an
accurate pop-up on my calendar to make sure I watched the DVM ;-)

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Remember: Once you go over the hill, you pick up speed

Jim Thompson wrote:

Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"
This is their test desk. It probably is actually a program on their #5 ESS
or whatever switch you are on, and it scans all the lines and connects the
test equipment to all on-hook lines to check for anomalies like weak
grounds. By analyzing this data with programs, they can detect trends,
such as water getting into cables, that need immediate attention. It might
not become evident from customer service requests until several weeks
later.

Jon

Jim Thompson wrote:

Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

Either the CIA, the Taliban, or Homeland Security is tapping your line.

Hope This Helps!
Rich

In article ,
Jim Thompson
wrote:

Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Do you have voicemail sending VMWI signals? Googling finds that there
are many proprietary signals that may be on a phone line in addition to
the modern FSK data, including periodic zero voltage.
--
I will not see posts from Google or e-mails from Yahoo because I must
filter them as spam

hamilton wrote:
On 5/7/2011 4:03 PM, Jim Thompson wrote:
Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Some one may be working at the CO.

Moving a rack or something.

I was this when I got DSL.

My Caller ID box went berserk over this for days, then it stopped.

hamilton
It is the feds establishing their wire-tapping system.
Since 911 this warrantless search has been increasing.
And your tin hat will not help..

On 5/7/2011 6:03 PM, Jim Thompson wrote:
Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Automated loop test. If the line is inactive, it gets tested, if active
then it is skipped until the next test.

--
I'm never going to grow up.

Jim Thompson wrote:

On Sat, 07 May 2011 16:11:52 -0600, hamilton
wrote:

On 5/7/2011 4:03 PM, Jim Thompson wrote:
Question for your guys experienced in telephone circuits...

Every 30 minutes it looks like my on-hook voltage drops from 50VDC to
ZERO for a fraction of a second.

It happens so fast I can't get an accurate read on it... but the
auto-ranging DVM drops from "V" to "mV"

What is this all about?

...Jim Thompson

Some one may be working at the CO.

Moving a rack or something.

I was this when I got DSL.

My Caller ID box went berserk over this for days, then it stopped.

hamilton

This is deadly on 30 minute intervals. I even was able to set an
accurate pop-up on my calendar to make sure I watched the DVM ;-)

...Jim Thompson

Hook up a scope (digital?) put it on a relatively slow trace and trigger on
the drop with some pre-trigger time set.

--
Paul Hovnanian
------------------------------------------------------------------
Fast wine, loose cars, old women.