SI2493-C-GT Silicon Laboratories Inc, SI2493-C-GT Datasheet - Page 30

• Manufacturer Part Number: SI2493-C-GT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-GT

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN93
30
Dn
En
E0
E1
Command
Dial
The dial command, which may be followed by one or more dial command modifiers, dials a phone
number:
Local DTE echo.
Disable.
Enable.
Table 18. Basic AT Command Set (Continued)
Modifier
! or &
, or <
@
W
G
P
L
T
;
Rev. 0.9
Action
Flash hook-switch for U4F (FHT) ms (default: 500
ms)
Pause before continuing for S8 seconds (default: 2
seconds)
Return to AT command mode after verifying dial
tone and dialing any digits.
Wait for silence. Returns “No Answer” when call is
terminated without a silent period after ringing.
Telephone voting mode. This modifier, intended for
use in Japan, enables a special dial-in voting mode
that may be used with certain automated voting
systems. When this modifier is placed anywhere in
the dial string (e.g, ATDG), the Si2493/57/34/15/04
dials the phone number and waits S7 seconds (60
by default) to detect a busy tone. When the busy
tone is detected, the Si2493/57/34/15/04 reports
whether a polarity reversal occurs between the
time the last digit is dialed and the detection of the
busy tone. If the S7 timeout occurs prior to a busy
tone detect, “NO CARRIER” will be reported.
Polarity reversal monitoring begins after the last
digit is dialed and ends when a busy tone is
detected or S7 times out.
The Si2493/57/34/15/04 reports either “POLARITY
REVERSAL” or “NO POLARITY REVERSAL”. It is
not possible to establish a modem connection
when using this command.
Radial Last Number
Pulse (rotary) dialing—pulse digits: 0, 1, 2, 3, 4, 5,
6, 7, 8, 9
Tone (DTMF) dialing—DTMF digits: *, #, A, B, C,
D, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Wait for dial tone before continuing for S14 sec-
onds (default: 12 seconds). Blind dialing modes
X0, X1, and X3 do not affect the W command.
If the DOP bit (U7A, bit 7) is set, the “ATDTW”
command causes the Si2457/34/15 to pause dial-
ing and either report an “OK” if a dial tone is
detected or “NO DIALTONE” if a dial tone is not
detected.
Function