GAI-Tronics 263-000 Isolation Barrier Unit (I.S. Phone) User Manual
Page 9
Pub. 42004-178D
Model 263 Isolation Barrier Unit (IBU)
Page: 9 of 13
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03/06
Equipment-Related Problems
Problem Solution
There is no incoming ring tone.
1. Check the I.S. telephone panel.
2. Check the Model 263 IBU.
No receiver audio, no sidetone,
and cannot hear touch tones
when pressed.
1. Check the I.S. telephone panel.
2. Check the Model 263 IBU.
3. There may be a wiring open or a short in the connecting cable.
Cannot dial out, but can hear
touch tones when pressed.
1. Check the Model 263 IBU.
2. There is no TELCO connection or it is faulty.
I.S. phone appears inactive.
1. Check the I.S. telephone panel.
2. Check the ac fuse F4 at the Model 263 IBU.
3. Ensure there is no wiring open in the connecting cable or at the I.S.
telephone.
CAUTION
Any field repairs on the intrinsically-safe design of the phone are strictly prohibited. Any such
change will void ALL hazardous approvals. Please contact the GAI-Tronics Field Service Department at
800-492-1212 inside the USA or 610-777-1374 outside the USA for the Regional Service Center closest
to you.