Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 198)

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7.5.3. Call – Automatic Tone Dial
Table 121 lists the commands that occur after the configuration defined in Table 120.
7.5.4. Call – Manual Off-Hook Tone Dial
Table 122 lists the commands that occur after the configuration defined in Table 120.
7.5.5. Call – Automatic Pulse Dial
Table 123 lists the commands that occur after the configuration defined in Table 120.
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" .
Table 121. Handset 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.
Depending on the number of rings the host may receive
events for ring-back notifications. If the line is
busy, a event will be sent to the host. After
connection, the host will receive events during
quiet periods of no voice.
Table 122. Handset 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.
Depending on the number of rings the host may receive
events for ring-back notifications. If the line
is busy, a event will be sent to the host.
After connection, the host will receive
events during quiet periods of no voice.
AT+VTS=[941,1336,20] OK
AT+VTS=[697,1336,20] OK
Table 123. Handset Automatic Pulse Dial
Host to Modem
Commands / Data
Modem to Host Result
Codes/Data
Local Modem Actions
ATDP102 OK
Perform automatic pulse dial of 102. Modem will return
OK. Depending on the number of rings the host may
receive events for ring-back notifications. If
the line is busy, a event will be sent to the
host. After connection, the host will receive
events during quiet periods of no voice.