Silicon Laboratories SI2494/39 manual Simplex Speakerphone Configuration, Call-Automatic Tone Dial

AN93

Table 137. Simplex Speakerphone Configuration

Host to Modem Command	Modem to Host	Local Modem Actions
	Result Code
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:U19940	OK	Enable SSP, configure for automatic switch mode

7.7.6. Call—Automatic Tone Dial

Table 138 lists the commands that occur after the configuration defined in Table 136.

	Table 138. Speakerphone Automatic Tone Dial
Host to Modem		Modem to Host Result	Local Modem Actions
Commands / Data		Codes/Data
			Perform automatic tone dial of 102. Modem will return
ATDT102		OK	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.

7.7.7. Call—Manual Off-Hook Tone Dial

Table 139 lists the commands that occur after the configuration defined in Table 136.

Table 139. Speakerphone Manual Off-Hook Dial

Host to Modem Commands	Modem to Host Result	Local Modem Actions
/ Data	Codes/Data
		The user is free to dial manually using the +VTS com-
		mands to create the DTMF digits.
AT+VTS=[697,1209,20]	OK	Generate DTMF 1 digit for 200 ms.
		Generate DTMF 0 digit for 200 ms.
AT+VTS=[941,1336,20]	OK
		Generate DTMF 2 digit for 200 ms.
AT+VTS=[697,1336,20]	OK	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.

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