Clear-Com TEL-14 - Manual (Page 7)

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 - 1
OPERATION
INTRODUCTION
This chapter describes how to use the TEL-14 two-channel auto-nulling
telephone interface. The TEL-14's panel controls and internal option switches
can select any one of a large number of modes of operation. This chapter
describes the five most common modes:
• Intercom-station telephone access
• Self-service dial-in
• Manual call screening
• Intercom-to-intercom
• Party-line dial-in
Intercom station operators will normally access telephone lines with the TEL-14
in the “intercom-station telephone-access” mode. However, station operators
may need to check with their system operator for further instructions if a
TEL-14 has been configured in a mode not described here.
Technical personnel should refer to Chapter 2, “Installation,” for details on
configuring the TEL-14's internal option switches for each of these modes (and
any others possible).
The next section, “Description,” covers the basic features of the TEL-14,
including its front-panel controls and indicators. The option switch settings are
described for each mode, but they are covered more thoroughly in Chapter 2.
The final sections cover the use of the TEL-14 in each of the five modes.
Important: When the TEL-14 is first connected to a new telephone line, its
automatic nulling process must be performed before it can be used. This
process consists of calling each line, depressing the Auto Answer button for 5
seconds, and then waiting several seconds while the automatic procedure is
carried out. It may not be possible to make outgoing calls on the telephone line
until this procedure is performed. Refer to the Automatic Telephone Line Null
section of this Operation Manual.
Note: Other configurations are possible, in addition to the configurations described
here. However, certain configurations may result in undesirable crosstalk, as a result of
the limitations of the TEL-14's circuitry. For example, consider a news reporter who
calls into the matrix. You would like to provide the reporter with a program feed, and
at the same time route his voice in through the matrix to a live broadcast. However,
the TEL-14 cannot perfectly isolate his talk from his listen, so some of his outgoing
program feed may leak into his incoming voice.
This chapter describes the
five most common modes of
operation.
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