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Slow Flash
• Lamp will slowly flash when you
have new Telco voice messages
(subscription required.)
Fast Flash
• Lamp will flash quickly when the
speakerphone is ringing.
On steady
• Lamp will light steady when the
speakerphone is in the Do Not Dis-
turb mode.
Off
• Lamp is off if there are no new mes-
sages and the Do Not Disturb mode
is off.
2. Line-In-Use Indication
If a single line telephone or other equip-
ment such as a facsimile machine is
using a line, that line lamp will light on
your telephone to indicate that the line
is busy. You may intrude on that busy
line to verify that the line is not out of
order. However, lines being used solely
by VT 4121 speakerphone are privacy
protected form intrusion.
3. Adjusting the Handset Volume
Level
While using the handset, you may ad-
just the volume level of the distant
party’s voice by pressing
VOLUME
. You will hear a confirmation tone
when the highest or lowest volume set-
ting is reached.
4. Adjusting the Speaker Volume
Level
While using the speakerphone, you may
adjust the volume level of the distant
party’s voice by pressing
VOLUME
. You will hear a confirmation tone
when the highest or lowest volume set-
ting is reached.
5. Adjusting the Headset Volume
Level
While using a headset, you may adjust
the volume level of the distant party’s
voice by pressing VOLUME . You
will hear a confirmation tone when the
highest or lowest volume setting is
reached.
6. Adjusting the Ringer Volume
Level
While the telephone is idle (not being
used), you may adjust the ringer vol-
ume level by pressing
VOLUME .
You will hear a confirmation tone when
the highest or lowest volume setting is
reached.
7. AC Power Failure Indication
If power has been interrupted to your
speakerphone the display will show:
Press any button or key to cancel the
power failure message.
BASIC OPERATION