Farallon Communications 612 - Manual (Page 105)

Troubleshooting 7-5
When the D channel LED goes out, it indicates that a valid
communication channel has been established and you can
make calls.
■ If the D channel LED remains lit for more than a few
minutes, it is likely that there is a poor physical connection
to the local telephone company.
This fault can be caused by a cable connected to one of
the analog device por ts instead of the ISDN jack, a dam-
aged cable, a broken wire, a damaged connector, a non-
standard U inter face (proprietar y AMI line coding), or a
problem within the telephone company network. If the tele-
phone wires at your site appear to be satisfactor y, call your
local telephone company for repair of telephone company
equipment and troubleshooting assistance.
■ If the D channel LED flashes for more than a few minutes
without going out, there is probably a mismatch between
the settings of the ISDN line and the Netopia ISDN Modem
configuration.
Check the switch type, Ser vice Profile Identifier (SPID)
entr y, and the phone number in the ISDN modem software
configuration utility.
If your switch type, SPID, and phone number are entered
properly and the D
channel LED continues to flash without
going out, call your telephone company, verify that you
have been given the correct SPID and phone number, and
ask whether the ISDN line is Point-to-Point. If the ISDN line
is Point-to-Point, be sure to NOT include the SPID in the
configuration.
Also verify that the telephone company has configured the
ISDN line properly for the Netopia ISDN Modem. (For infor-
mation,
see the “General ISDN line configuration” section
on page 2-14. ) If the D channel LED does not go out after
these verifications, call Farallon technical suppor t for line
configuration and troubleshooting assistance.