RTS CS9500, Руководство пользователя

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"SUPER" AUTO ADDENDUM
(supercedes Addendum 2)
SOFTWARE VERSION V5.2
This version of software is intended for use on the Italian telephone
system. The Italian phone- system
uses
a non-standard reorder tone
that is pulsed at a rate of
200
on/
off.
Ring frequency is
Hz.
HARDWARE CONSIDERATIONS: In order to recognize this tone the
hardware must be changed. First, the crystal frequency
is
changed to make
the call progress detector chip detect Because of the short duration of
the tone, this chip has a difficult time detecting a valid tone.
an
extra
op-amp section is added to the hardware to ensure a high enough level is
presented to the chip's input. To avoid release from music and other
sources the talk-off portion of the code has been modified to detect
four
consecutive tone sequences. Should the levels not
be
consistently high enough,
the unit may take more than four beeps to turn off. The DTMF decoder will
not operate at all because its reference frequency has been changed (to
accommodate the
call
progress detector chip).
CONSIDERATIONS: This version of software can be used with
the Telos Dial converter board. When a DTMF tone is
present on the send input of the hybrid, the converter board will hold the
hybrid's "on" pin low. This is done
so that the hybrids output is muted
during pulse dialing. Furthermore, the Super Auto-answer boards software
must not try to tum the hybrid off because of T/R reversal or loop drop, which
could happen during pulse dialing. (See the schematic of the converter board
for details.)
This software version addresses this problem by looking at the
"on" pin while in the mode and compensates for the pulse dialing
by adding a time-out period after the pin has been released. It then goes
back to the current detectors to reset
its
"when-to-tum-off sequence.
V5.2
supports all DIP options (identical to AA
as
well
as
most all the signals on the 15-pin connector, including remote
and their respective indicator outputs. The decoded DTMF
outputs are disabled and should not be
used.