At Commands For Dtmf Detection - insys icom i-modul ISDN HIX V4 Designer's Manual

i-modul ISDN HIX V4
14.4

AT Commands for DTMF Detection

These commands allow the DTMF detection for DTMF signals on the B channel of
the ISDN line.
The DTMF detection is only possible, if the B channel protocol is configured to
transparent (ATB5) and the output of the received data is disabled
(AT**RCVDATA=0).
Detected and valid received DTMF signals are output via the V.24 interface using
the following syntax within the V.24 data stream.
Default values are printed bold.
Command
AT**RCVDATA
AT**RCVDTMF
Table 18: Overview of AT commands for DTMF detection
Description
Disables the output of B channel data
This command disables the output of B channel data, which have been
received via the ISDN line, via the V.24 interface.
Note: Only possible, if ATB5 is configured.
ATRCVDATA=0 Disables the reception of data from the ISDN line
ATRCVDATA=1 Enables the reception of data from the ISDN line
Enables the evaluation of DTMF signals
This command enables the evaluation of DTMF signals, which are received
via the ISDN line.
ATRCVDTMF=0 Disables the evaluation of DTMF signals
ATRCVDTMF=1 Enables the evaluation of DTMF signals
The received DTMF tones are output as follows:
Key "1" of the connected phone pressed
<DLE>1
Key "2" of the connected phone pressed
<DLE>2
Key "*" of the connected phone pressed
<DLE>*
Key "#" of the connected phone pressed
<DLE>#
<DLE> is output as hexadecimal value 0x10
Special AT Commands for Voice Functions
65