Clear-Com TEL-14 - Manual (Page 15)

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
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INSTALLATION
INTRODUCTION
This chapter describes the TEL-14 two-channel auto-nulling telephone interface
and its installation in the matrix, including setting internal option switches,
wiring to external devices, operation of the front panel controls and indicators,
and electrical and mechanical specifications. The following subjects are covered
in this chapter:
• Description
• Installation in an interface frame
• Wiring
• Setup
• Configuration
The TEL-14's panel controls and internal option switches can select any one of a
large number of modes of operation for the TEL-14. For this reason, this section
describes each option switch individually, and then describes the installation
settings for five of the TEL-14's most common modes:
• Intercom-station telephone access
• Self-service dial-in
• Manual call screening
• Intercom-to-intercom
• Party line dial-in
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.
Note: When using the TEL-14 with a speaker station, keep the panel mic gain low. In
general, keep all gain controls set to a level which is acceptable, but not excessive.
Warning: The TEL-14 works with POTS (Plain Old Telephone Service) Central Office
(CO) lines. Analog station lines from some PABXs are not compatible.
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