Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 221)

AN93
Rev. 1.3 221
7.7.6. Call—Automatic Tone Dial
Table 138 lists the commands that occur after the configuration defined in Table 136.
7.7.7. Call—Manual Off-Hook Tone Dial
Table 139 lists the commands that occur after the configuration defined in Table 136.
Table 137. Simplex Speakerphone Configuration
Host to Modem Command Modem to Host
Result Code
Local Modem Actions
AT:U1CD,40,10 OK Set LEC Filter Length
Set LEC Delay
AT:U1D5,C8,400,400,7FFF OK Set Holding Time (ms)
Set Speaker Threshold
Set Microphone Threshold
Disable break-through
AT:U199|40 OK Enable SSP, configure for automatic switch mode
Table 138. Speakerphone Automatic Tone Dial
Host to Modem
Commands / Data
Modem to Host Result
Codes/Data
Local Modem Actions
ATDT102 OK
Perform automatic tone dial of 102. Modem will return
OK. The user will not receive <DLE> events for dial
tone, ring-back, busy, and quiet since the detectors are
disabled. See Table 117 for details on active detectors.
Table 139. Speakerphone Manual Off-Hook Dial
Host to Modem Commands
/ Data
Modem to Host Result
Codes/Data
Local Modem Actions
AT+VTS=[697,1209,20] OK
The user is free to dial manually using the +VTS com-
mands to create the DTMF digits.
Generate DTMF 1 digit for 200 ms.
Generate DTMF 0 digit for 200 ms.
Generate DTMF 2 digit for 200 ms.
The user will not receive <DLE> events for dial tone,
ring-back, busy, and quiet since the detectors are dis-
abled. See Table 117 on page 190 for details on active
detectors.
AT+VTS=[941,1336,20] OK
AT+VTS=[697,1336,20] OK