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Old April 10th 18, 09:30 AM posted to uk.telecom,uk.telecom.broadband
Martin Brown[_2_]
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Posts: 161
Default Intermittent phone line disconnections, however.....

On 08/04/2018 16:13, Mark Carver wrote:

.......broadband service is unaffected.

It's my mother's line. The fault is either the voice side either going
open-circuit, or short circuit. On outgoing calls, it causes
'cleardown'. On incoming calls there's a click and loss of audio for a
few 100 milliseconds, and all carries on again as normal.

On Friday night, the line was permanently 'engaged' for at least 4
hours, at mother's end no dial tone, just a 'humming sound' so perhaps
it's a short ?

You should probably have reported it whilst it was in this state.
Intermittent faults are a problem to track down by their nature.

The broadband router logs don't report any traumas, and an 'uptime' of
40 days, speed unaffected (16ish meg sync speed ADSL2+), and all the
happy lights remain green and normal (even during the 4 hour 'engaged'

17070 'Quiet Line' is deadly quiet.

Therefore I'm fairly confident the problem is somewhere inside the
exchange ?

Not necessarily it could be a line break in the making that is still
capacitively coupling the ADSL sync RF but is unable to carry the
current required to maintain a POTS circuit.

Checked master socket, extensions, etc, etc.

Unfortunately, it's a very intermittent fault (except for Friday's session)

Anybody ever experienced similar ?

Not exactly the same. Bad lines usually take down ADSL too. Do the error
second and CRC error correction on the modem show anything unusual?

Martin Brown