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Joined: Sep 2010
Posts: 12
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the system has a bad noise on incoming calls
dial tone is on a T1, 10 lines on system,
We replaced the trunk card.. the T1 carrier
also replaced there equipment.
NEC tech support says it's not them/ there
equipment..
Any help .. out there ??
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Joined: Apr 2005
Posts: 2,526 Likes: 4
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Joined: Apr 2005
Posts: 2,526 Likes: 4 |
Did tech support confirm with you the cabinet has a good ground?
We get old too soon, smart too late
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Joined: Sep 2010
Posts: 12
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yes we grounged to cold water pipe. 15ft away
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Joined: Sep 2010
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note we had xo lower the voltage on all line
the customer said no change..
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Joined: Sep 2005
Posts: 971
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Did you read the impedance of the ground ?
Water line would be my last choice of grounding.
-TJ-
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Joined: Sep 2010
Posts: 12
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OK then where is a good ground..
cold water..
phone company ground ??
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Joined: Jan 2004
Posts: 6,648
RIP Moderator-Nisuko-Tie, General
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RIP Moderator-Nisuko-Tie, General
Joined: Jan 2004
Posts: 6,648 |
Skip
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Serving SW and West central Fl since 1984
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Joined: Sep 2010
Posts: 12
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what tool reads impedance of a cold water pipe??
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Joined: Sep 2010
Posts: 12
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Posts: 12 |
building tilt up ,, we ran a cat 6 for T1 feed
inside a outside pipe..
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Joined: Sep 2010
Posts: 12
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nec said to take a slt card , and put the stations into the trunk card to test the trunk ports
all is fine,
we installed new cat5E cable for phones
NO CHANGE
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