Silicon Laboratories SI2493/57/34/15/04 Handset Automatic Tone Dial, Handset Manual Off-Hook Dial

AN93

7.5.3. Call – Automatic Tone Dial

Table 121 lists the commands that occur after the configuration defined in Table 120.

	Table 121. Handset 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 OK.
		Depending on the number of rings the host may receive
ATDT102	OK	<DLE><r> events for ring-back notifications. If the line is
		busy, a <DLE><b> event will be sent to the host. After
		connection, the host will receive <DLE><q> events during
		quiet periods of no voice.

7.5.4. Call – Manual Off-Hook Tone Dial

Table 122 lists the commands that occur after the configuration defined in Table 120.

	Table 122. Handset 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.
		Depending on the number of rings the host may receive
		<DLE><r> events for ring-back notifications. If the line
AT+VTS=[697,1336,20]	OK	is busy, a <DLE><b> event will be sent to the host.
		After connection, the host will receive <DLE><q>
		events during quiet periods of no voice.

7.5.5. Call – Automatic Pulse Dial

Table 123 lists the commands that occur after the configuration defined in Table 120.

	Table 123. Handset Automatic Pulse Dial
Host to Modem	Modem to Host Result	Local Modem Actions
Commands / Data	Codes/Data
		Perform automatic pulse dial of 102. Modem will return
		OK. Depending on the number of rings the host may
ATDP102	OK	receive <DLE><r> events for ring-back notifications. If
		the line is busy, a <DLE><b> event will be sent to the
		host. After connection, the host will receive <DLE><q>
		events during quiet periods of no voice.

7.5.6. Answer

A ring event will prompt the user to lift the handset. This will generate a Handset Raised Event and the Handset Configuration procedure defined in Table 120 should be used to answer the call. For ring detection and local ring tone/melody generation, see "7.6.2. TAM Hands-Free—Idle" .

198 Rev. 1.3