Dell 1135N Service Manual page 141

4) Defective FAX FORWARD
Description : RECEIVE is functioning, but FORWARD is not functioning or the received data is
broken.
1. Check if there is NOISE
when pressing on-hook dial.
2. Check the RECEIVE
condition by trying to forward
a FAX to another fax machine from
the forwarding side FAX.
3. Check if the telephone
line connected to the Product
is contaminated or gets
stripped off or down.
Service Manual
Alignment and Troubleshooting
4-68
If it makes NOISE while using
on-hook dial, replace or
repair the telephone line.