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TEL-14 TWO-CHANNEL TELEPHONE INTERFACE
Switch S1-8 Guard Time:
In the first few seconds after the TEL-14 answers
an incoming call, the telephone system may produce momentary
interruptions in the current feeding the TEL-14. These interruptions
may not occur in some telephone systems. When set to the Normal
position, a guard time of about 5 seconds is in effect to prevent these
interruptions from prematurely disconnecting the call. Depending
upon how the TEL-14 is used, it may be common to have very short
telephone calls lasting less than 5 seconds. If the
Guard Time switch S1-8 is set to Normal, the TEL-14 will not be
able to detect the disconnect pulse at the end of these short calls.
The Short setting of the Guard Time switch changes the guard time
to about 0.25 seconds. If very short calls will be common and if the
telephone system does not produce any momentary interruptions
at the start of a call, then the Guard Time switch S1-8 may be set to
the Short setting. If the short setting is used and calls sometimes
prematurely disconnect within the first few seconds, then the
Normal setting must be used. The factory setting is Normal (ON).
Switch S5-1 & S5-2 Eclipse Identification:
This switch will identify the card
to a Matrix Plus II, Matrix Plus 3, or Eclipse Matrix System as a TEL-
14. S5-1 and S5-2 should always be operated in concert so that
either both are ON or both are OFF. If the TEL-14 is used with a
Matrix Plus 3 or Eclipse Matrix System, they should be set to the
ON position. If the TEL-14 is used with a Matrix Plus II System,
they should be set to the OFF position. The factory default setting
is ON.
Switch S7-1, S7-2, S7-3 and S7-4 Disconnect tone Selection:
These
switches set the frequency of the call progress tones that the TEL-14
will sense as an indication of a disconnected call. Call progress tones
are the dial tones or busy tones often heard after the distant caller
hangs up. These tones can be used by the TEL-14 as a means of
detecting when a call is complete and must be disconnected. These
tones vary in different parts of the world and in different telephone
systems. The factory default setting for S7 is for North America. The
variety of possible settings is shown in the following table:
FREQUENCY
EXAMPLE
COUNTRY
CADENCE*
S7-1
S7-2
S7-3
S7-4
480+620 Hz
North America
Interrupted
ON
OFF
ON
OFF
350+440 Hz
North America
Steady
ON
OFF
ON
OFF
400 Hz
Chile, Thailand
Interrupted
ON
ON
OFF
OFF
425 Hz
Austria,
Germany
Interrupted
OFF
OFF
OFF
ON
440 Hz
Czech Republic
Interrupted
OFF
OFF
OFF
OFF
Table 2-1: Disconnect Tone Settings
Содержание ECLIPSE TEL-14
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