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Chapter 8 277
Signaling Encoder and Decoder - Screens and Control Fields
Control Fields for the Signaling Encoder and Decoder
Stop DSAT (FVC)
This field is available only in NAMP-NTAC mode.
Selecting this field stops the digital supervisory audio tone.
Screens Where Field is Present
SIGNALING ENCODER (Modes: NAMP-NTAC)
Stop Filler (FOCC)
Selecting this field stops the Filler information from being output
after Send Filler or Send is used.
Screens Where Field is Present
SIGNALING ENCODER (Modes: AMPS-TACS, NAMP-NTAC)
Stop Meas
This field is used to disarm the decoder when making single
measurements (encoder Send Mode is set to Single). It is not used
when making continuous (Cont) measurements.
Screens Where Field is Present
SIGNALING DECODER (Modes: All Modes)
Sym
The symbol column corresponds to the DTMF decoder’s symbols
assigned for each tone. As each tone pair is analyzed, the corresponding
symbol is listed in this column.
Operating Considerations
The symbol assigned to a received tone is based on the closest symbol
frequency to that pair.
Screens Where Field is Present
SIGNALING DECODER (Modes: DTMF)
Symbol Frequencies (Hz)
The eight column/row frequencies are automatically entered by the
Standard field setting. You can change the frequency values using the
DATA keys.
Screens Where Field is Present
SIGNALING ENCODER (Modes: DTMF)