ZyXEL U-1496S Plus User Guide - Page 92

Examples Of Voice Mode Operation

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1: DTMF '1' received 2: DTMF '2' received 3: DTMF '3' received 4: DTMF '4' received 5: DTMF '5' received 6: DTMF '6' received 7: DTMF '7' received 8: DTMF '8' received 9: DTMF '9' received #: DTMF '#' received *: DTMF '*' received c: T.30 fax calling tone received b: Busy tone received q: Quiet detected. The DCE has determined that there was voice energy present at the beginning of the voice recording session followed by a period of silence greater than the amount of time selected by the AT+VSD command. s: Silence detected. The DCE has determined that there was no voice energy present at the beginning of the voice recording session followed by a period of silence greater than the amount of time selected by AT+VSD command. DTMF DETECTION DTMF detection is reported by the above shielded code. When the detection is enabled, it is controlled by the setting of S39b6. S39b6 = 0; DTMF detection is enabled only in PLAY and RECORD mode. = 1; DTMF detection is enabled as soon as the AT+VLS=2 command is sent. Note: AT auto DTE speed detection is disabled when DTMF detection is enabled. VOICE DATA FORMAT The voice data file format is described in the ZFAX document on the software diskette. Compressed voice data has a continuity property, i.e., you cannot cut and paste to edit the voice files. In order to enable editing, resync symbols can be inserted into ADPCM voice data at 50ms intervals. The ADPCM coder is reset with every resync symbol, thus ADPCM voice data will not depend on too long a data history. If you convert the compressed voice data into the uncompressed PCM data file, you can always edit the PCM file with no problem. The resync symbol is a shielded code - (hex 10 and 12). Resync generation is controlled by the setting of S39b7. S39b7 = 0; No resync generation. = 1; ADPCM voice data includes resync generation. The resync symbol can also be used as a timing mark. EXAMPLES OF VOICE MODE OPERATION 1. Greeting message recording (Connect a microphone or telephone set to dial-up line RJ11C jack).

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<DLE>1: DTMF '1' received
<DLE>2: DTMF '2' received
<DLE>3: DTMF '3' received
<DLE>4: DTMF '4' received
<DLE>5: DTMF '5' received
<DLE>6: DTMF '6' received
<DLE>7: DTMF '7' received
<DLE>8: DTMF '8' received
<DLE>9: DTMF '9' received
<DLE>#: DTMF '#' received
<DLE>*: DTMF '*' received
<DLE>c: T.30 fax calling tone received
<DLE>b: Busy tone received
<DLE>q: Quiet detected. The DCE has determined that there was voice energy present at the
beginning of the voice recording session followed by a period of silence greater than the amount
of time
selected by the AT+VSD command.
<DLE>s: Silence detected. The DCE has determined that there was no voice energy present at
the beginning of the voice recording session followed by a period of silence greater than the
amount of time selected by AT+VSD command.
DTMF DETECTION
DTMF detection is reported by the above <DLE> shielded code. When the detection is
enabled, it is controlled by the setting of S39b6.
S39b6
= 0; DTMF detection is enabled only in PLAY and RECORD mode.
= 1; DTMF detection is enabled as soon as the AT+VLS=2 command is sent.
Note: AT auto DTE speed detection is disabled when DTMF detection is enabled.
VOICE DATA FORMAT
The voice data file format is described in the ZFAX document on the software diskette.
Compressed voice data has a continuity property, i.e., you cannot cut and paste to edit the voice
files. In order to enable editing, resync symbols can be inserted into ADPCM voice data at 50ms
intervals. The ADPCM coder is reset with every resync symbol, thus ADPCM voice data will not
depend on too long a data history.
If you convert the compressed voice data into the uncompressed PCM data file, you can always
edit the PCM file with no problem. The resync symbol is a shielded <DLE> code - <DLE><DC2>
(hex 10 and 12). Resync generation is controlled by the setting of S39b7.
S39b7
= 0; No resync generation.
= 1; ADPCM voice data includes resync generation.
The resync symbol can also be used as a timing mark.
EXAMPLES OF VOICE MODE OPERATION
1. Greeting message recording (Connect a microphone or telephone set to dial-up line RJ11C
jack).