Specifications

Si2404
56 Rev. 0.91
Reset settings = 0x0000
U7A GENA
BitD15D14D13D12D11D10D9D8D7D6D5D4D3 D2 D1 D0
Name DOP ADD V22HD HDLC FAST
Type R/W R/W R/W R/W R/W
Bit Name Function
15:8 Reserved Read returns to zero.
7DOPDial or Pulse.
0 = Normal ATDTW operation
1 = Use ATDTW for Pulse/Tone Dial Detection (see also ATDW command)
6ADDAdaptive Dialing
1 = Enable
0=Disable
Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as
DTMF. If a dialtone is still present after two seconds, the Si2404 will redial the first digit and
remaining digits as pulse. If a dialtone is not present after two seconds, the Si2404 will dial
the remaining digits as DTMF.
5:3 Reserved Read returns to zero.
2 V22HD V.22bis Synchronous Mode.*
0 = Normal asynchronous mode.
1 = Transparent HDLC mode.
1HDLCSynchronous Mode.*
0 = Normal asynchronous mode.
1 = Transparent HDLC mode.
0 FAST Fast Connect.*
0 = Normal modem handshake timing per ITU/Bellcore standards.
1 = Fast connect modem handshake timing.
*Note: When V22HD, HDLC, or FAST bits are set, \N0 (wire mode) must be used.