Multi-Tech Systems 7500 - Manual (Page 287)

ION 7500 / ION 7600 User’s Guide Conexant Modems in ION Meters
Modem AT Commands Technical Note Page 287
Conexant Modems in ION Meters
Some ION meters that are ordered with the internal modem option are equipped
with the older type Conexant modem. To find out what type of modem your meter
has, refer to the section, “ION Meter Internal Modem Types” on page 282.
AT Commands for the Conexant Modem
The following lists the AT commands that are compatible with ION meters
equipped with the Conexant internal modem.
Command Group Members Description
Bn
Select CCITT or BELL
Mode
ATB0 CCITT Mode
ATB1 BELL Mode (default)
Sn Read/Write S-Register ATSn=v Sets S-Register n to the value v
&Fn
Restore Factory
Configuration (Profile)
AT&F0 Restore factory configuration 0
AT&F1 Restore factory configuration 1
&Gn Select Guard Tone
AT&G0 Disables guard tone (default)
AT&G1 Disables guard tone
AT&G2 Selects 1800 Hz guard tone
%Cn
Enable/DisableData
Compression
AT%C0 Disables data decompression
AT%C1
Enables MNP 5 data
compression negotiation
AT%C2
Enables V.42 bis data
compression
AT%C3
Enables both V.42 bis and
MNp 5 data compression
%En
Enable/Disable Line
Quality Monitor & Auto-
Retrain or Fallback/Fall
Fwd
AT%E0 Disable line quality
AT%E1
Enable line quality monitor and
auto-retrain
AT%E2
Enable line quality monitor and
fallback/fall forward
\An
Select Maximum MNP
Block Size
AT\A0 64 characters
AT\A1 128 characters (Default)
AT\A2 192 characters
AT\A3 256 characters