SI2457-D-FS Silicon Laboratories Inc, SI2457-D-FS Datasheet - Page 79
SI2457-D-FS
Manufacturer Part Number
SI2457-D-FS
Description
IC ISOMODEM SYSTEM-SIDE 16SOIC
Manufacturer
Silicon Laboratories Inc
Specifications of SI2457-D-FS
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Notes:
1. The initial number attempted to test for an outside line is controlled by S51 (default = 1).
2. AT&$ reflects the last AT&P command issued but does not reflect any subsequent changes made by writing U registers
Y2A
&X1
&X2
&Z
with AT:U.
2
Automatic determination of telephone line type.
Result code: WXYZn
W:
X:
Y:
Z:
n:
Same as &X1, but Y result (PBX) is not tested.
Produce a constant answer tone (ITU-T) and return to command mode. The answer tone continues
until the ATH command is received or the S7 timer expires.
Enter low-power wake-on-ring mode.
Si3018 V
0 = line supports DTMF dialing.
1 = line is pulse dial only.
0 = line supports 20 pps dialing.
1 = line supports 10 pps dialing only.
0 = extension network present (PBX).
1 = outside line (PSTN) connected directly.
0 = continuous dial tone.
1 = make-break dial tone.
0–9 (number required for outside line if Y = 0).
Table 40. Extended AT& Command Set (Continued)
RING
Figure 25. Phone Line Termination Circuit
TIP
TR
+
–
10 µF
600
Rev. 1.3
1
I
L
AN93
79
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