System information

28 LINGO TECHNICIAN’S GUIDE
Testing the single-line ports
Perform the following tests before you
connect Lingo to the telephone system.
These tests ensure that the telephone
system single-line ports are functioning
properly. You can then quickly isolate and
troubleshoot any problems with the Lingo
setup. For the tests, you need a standard,
single-line, touchtone telephone with a
ringer.
Where appropriate, repeat these tests for
each telephone system single-line port
that is used as a Lingo extension. To test a
single-line port, plug the modular connec-
tor from the single-line telephone into the
appropriate modular jack. You use the test
telephone to simulate Lingo activity.
❑
Test for ringing.
Call the test telephone from a regular
extension. If you can ring the test tele-
phone connected to the single-line port,
then the port is recognized by the tele-
phone system and is generating a ring
signal.
❑
Test for single-line port DTMF signaling.
Use the test telephone to dial out to a
regular extension. If you can reach the
extension, then the telephone system is
receiving and recognizing DTMF signal-
ing from the single-line port.
❑
Test for extension DTMF signaling.
Use a regular extension to call the test
telephone. Answer the test telephone
and press digits on the regular exten-
sion’s keypad. If you can hear touch-
tones at the test telephone, the exten-
sion is able to send DTMF signals to
Lingo.