Silicon Laboratories Si2415 Especificações descarregar pdf (Página 33)

Si2457/34/15/04

Rev. 1.3 33

Table 10. Extended AT% Command Set (Command Defaults in Bold)

Command Action

%$ Display AT% command settings.

%B Report blacklist. See also S42 register.

%Cn Data compression

%C0 Disable V.42bis and MNP5 data compression

%C1 Enable V.42bis in transmit and receive paths. If MNP is selected (\N2), then %C1 enables

MNP5 in transmit and receive paths.

%C2 Enable V.42bis in transmit path only.

%C3 Enable V.42bis in receive path only.

%On Answer mode.

%O1 Si2457/34/15/04 will auto-answer a call in answer mode.

%O2 Si2457/34/15/04 will auto-answer a call in originate mode.

%Vn Automatic Line Status Detection.

After the %V1 and %V2 commands are issued, the Si2457/34/15/04 will automatically check the

telephone connection for whether or not a line is present. If a line is present, the Si2457/34/15/04

will automatically check if the line is already in use. Finally, the Si2457/34/15/04 will check line status

both before going off-hook and again before dialing. %V1 uses the fixed method, and %V2 uses the

adaptive method. %V0 (default) disables this feature.

%V0 Disable automatic line-in-use detection.

%V1 Automatic Line Status Detection—Fixed Method.

Description: Before going off-hook with the ATD, ATO, or ATA commands, the Si2457/34/15/04 com-

pares the line voltage (via LVCS) to registers NOLN (U83) and LIUS (U84):

Loop Voltage

Action

0  LVCS  NOLN Report “NO LINE” and remain on-hook.

NOLN  LVCS  LIUS Report “LINE IN USE” and remain on-hook.

LIUS  LCVS Go off-hook and establish a modem connection.

Once the call has begun, the off-hook intrusion algorithm (described in "4.12.2. Off-Hook Intrusion

Detection" on page 19) operates normally. In addition, the Si2457/34/15/04 will report “NO LINE” if

the telephone line is completely disconnected. If the HOI bit (U77, bit 11) is set, “LINE IN USE” is

reported upon intrusion.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 59 60

Sem comentários

Silicon Laboratories Si2415 Especificações Página 33