Clear-Com TEL-14 - Manual (Page 12)

T E L - 1 4 T W O - C H A N N E L T E L E P H O N E I N T E R F A C E 1 - 6
The above initial automatic nulling process should not need to be repeated,
unless the telephone line connection is changed to a different telephone number
or if there is reason to believe the telephone line impedance has changed
significantly--for example, if echoing or feedback occurs at a lower volume
setting than before.
OPERATION
This section describes the operation of the TEL-14 in each of the following
modes:
• Intercom-station telephone access
• Self-service dial-in
• Manual call screening
• Intercom-to-intercom
• Party-line dial-in
INTERCOM-STATION TELEPHONE-ACCESS MODE
In “intercom-station telephone-access” mode, a call on a TEL-14 line can be
answered by any intercom station with a selector key assigned to a TEL-14 port
label. Intercom stations can originate a call by using the "dial phone" mode.
If the call must originate at another station model, then this station must have a
key programmed to activate a DTMF sequence. Another way to arrange this is
for the operator to have access to a standard telephone set connected with the
TEL-14 line (for further information, see "Manual Call Screening Operation"
below).
The default settings of the TEL-14 allow “station access” mode.
If the “immediate manual disconnect” feature is disabled, there will be a period
of 15 seconds between the time when you deactivate the path to the TEL-14 port
and the time when the TEL-14 hangs up the line. This gives you time to transfer
the call to another station, or to recover an accidental deactivation of the path to
the TEL-14 without losing the call.
If your station is on the "preset call signal list" for the TEL-14 port, you will
automatically receive a call signal whenever the TEL-14 answers an incoming
telephone call. The call signal will continue for as long as the line is ringing.
SELF-SERVICE DIAL-IN MODE
In “self-service dial-in” mode, also referred to as "telephone IFB" mode, the
TEL-14 will answer automatically whenever outside callers dial in. The caller will
be automatically connected to a preset party-line, station, or program feed.
Auto-disconnect will release the line automatically after the caller hangs up. This
mode can also be used to implement "direct inward access" and "dial-up IFB".
This mode is normally configured to "prevent stations from calling out" to leave
the line available for dial-in use only.