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56K V.92 Data, Fax, and Voice Chipset
8 Intel Confidential Programmer’s Guide
2. AT COMMAND SUMMARY TABLES
This section contains summary tables of all AT commands, S-registers, and manufacturing-only
commands. These commands are described fully in the relevant sections of the Programmer’s
Guide.
Table 2-1. Data Mode Command Summary
Note Command Function Default Range
Reported by
&Vn
** A/ Repeat last command none – no
A Answer none – no
* Bn Select ITU-T or Bell* 1 0–3 yes
B0
Selects ITU-T V.22 at 1200 bps and ITU-T
V.21 at 300 bps
B1
Selects Bell 212A at 1200 bps and Bell 103J
at 300 bps
B2
Selects ITU-T V.23 only. The originating
modem transmits at 75 bps (and receives at
1200 bps); the answering modem receives at
75 bps (and transmits at 1200 bps)
B3
Selects ITU-T V.23 only. The originating
modem transmits at 1200 bps (and receives
at 75 bps); the answering modem receives at
1200 bps (and transmits at 75 bps)
Cn Carrier control option 1 0, 1 no
C0 Transmit carrier always off
C1 Normal transmit carrier
D Dial command none – no
* En Command mode echo 1 0, 1 yes
E0 Disables echo
E1 Enables echo
Fn Online echo 1 0, 1 no
F0 Enables online echo
F1 Disables online echo
Hn Switch hook control 0 0, 1 no
H0 Hangs up the telephone line
H1 Picks up the telephone line
In Identification/checksum option 0
0–8, 10, 11,
14, 20–23
no
I0 Reports product code
I1 Reports modem chip firmware version
I2 Verifies ROM checksum
I3 Reports chipset name