Dial Tones; Using The Switchhook; Limitations - AT&T PARTNER Installation And Use Manual

Dial Tones

You will encounter two different dial tones when making calls:
Outside dial tone is generated by your local phone company and
indicates that you can make an outside call.
Intercom dial tone is generated by the system and indicates that you
can make an inside, or intercom, call.
It is important that you recognize the difference between the two types of dial
tones. The best way to do this is to listen to each one and compare them. To
hear the difference between the two dial tones, lift the handset. The dial tone
you hear (assuming the phone has been changed to select intercom first, as
recommended in this guide) is an intercom dial tone. To hear outside dial tone,
press [ ].
9

Using the Switchhook

Some of the call handling instructions in Chapter 5 direct you to "rapidly press
and release the switchhook." Pressing the switchhook for 1/4 to 1 second sends
a signal over the line called a switchhook flash. However, do not press the
switchhook too quickly. If you press the switchhook and nothing happens, try
again and press it a little longer.
NOTE:
If your phone has a button labeled "Recall" or "Flash," use that button instead of
pressing the switchhook. For more information, see "Recall" in Chapter 5.

Limitations

Because standard phones do not have line buttons or dedicated function
buttons, basic call handling procedures are sometimes different from those on
system phones. In addition, the following limitations apply to a standard phone:
You cannot change option settings.
Because there are no line buttons on standard phones, users cannot
manually select a line. You can make outside calls only on automatically
selected lines (for information on Automatic Line Selection, see Chapter
5).
If a standard phone is in use, there is no indication of a second call and
inside callers will hear a busy tone.
You can make a voice-signaled intercom call from a standard phone, but
if users try to make a voice-signaled call to a standard phone, it will ring.
Users cannot access the Conference Drop or Privacy features.
Users cannot receive a group page.
3-8 Learning About Telephones