52 CHAPTER A: TELEPHONE INSTALLATION AND MAINTENANCE
Tabl e 4 Possible ProblemsPossible Problem Suggested Solutions
My telephone has no dial
tone and the display panel
is blank.
■Verify that the power cord is fully inserted in the
correct connector on the underside of the
telephone. Use the strain relief tab to prevent the
cord from becoming unplugged.
■Verify that the Ethernet cables are connected and
that each cable is in the proper connection.
■Remove and add power to the telephone by
unplugging the power cord at the electric outlet
and plugging it back in.
■If the telephone is powered through a powered
Ethernet cable, make sure that power is applied to
the cable at its source.
I hear a high pitch tone but
not a dial tone.
■You are not logged in to your telephone.
My telephone has “locked
up.”
■Your telephone has lost the connection to the
system. Remove the Ethernet cord from the jack,
and then re-insert it into the jack.
■Wait a few seconds. If the telephone display panel
still appears to be locked, disconnect the electrical
power for your telephone, and then plug it back in.
Callers cannot leave
messages on my voice mail.
Your mailbox may be full. Log in to your voice mailbox
and delete some messages.
When I dial 9 or 8 to access
an outside line, the display
panel shows “All Ports
Busy.”
No outside lines are available. Try again in a few
minutes.
My telephone keeps
ringing after I pick up the
handset.
■Your telephone may have lost connection to the
system immediately after a call came in. Remove the
Ethernet cord from the jack, then re-insert it into
the wall jack.
■Wait a few seconds. If the telephone continues to
ring, disconnect the electrical power for your
telephone, and then plug it back in.
The display panel shows
“Wait for NCP.”
Your telephone may be disconnected from the system.
Hang up your telephone and wait a few seconds. Then
pick up the handset. If the message still appears on
your telephone display panel, contact your
administrator.