Z02215 Datasheet, PDF (30/74 Pages) Zilog, Inc. – Single Chip Modem with Integrated Controller, Data Pump, and Analog Front End

Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
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Table 3. AT Command Set (Continued)
Command
&HT
PTT Test
Function and Description
The &HT command enables the modem to transmit tones for PTT testing. The
test tone is generated until a character is typed on the modem’s terminal. If this
command is issued when the command is disabled by a country configuration,
the modem returns an ERROR result.
&HT0 – &HT9 DTMF tone for digit n where the command is &HTn
&HT10
DTMF tone“*”
&HT11
DTMF tone “#”
&HT12
DTMF tone “A”
&HT13
DTMF tone “B”
&HT14
DTMF tone “C”
&HT15
DTMF tone “D”
&HT16
V.21 channel 1 mark
&HT17
V.21 channel 2 marks
&HT18
V.23 1200bps marks
&HT19
V.23 75bps marks
&HT20
V.21 channel 1 spaces
&HT21
V.21 channel 2 spaces
&HT22
V.23 1200bps spaces
&HT23
V.23 75bps spaces
&HT24
V.22 originate mode
&HT25
V.22 answer mode
&HT26
V.22bis originate mode
&HT27
V.22bis answer mode
&HT28
V.25 calling tone
PS001907-0904
AT Command Set