Multi-Tech Systems 7500 - Manual (Page 283)

ION 7500 / ION 7600 User’s Guide Multi-Tech Modems in ION Meters
Modem AT Commands Technical Note Page 283
Multi-Tech Modems in ION Meters
The Multi-Tech ModemModule TM is the newer-type modem equipped in ION
meters that are ordered with the internal modem option. The Multi-Tech modem
is compatible with most telephone systems in the world, with the exception of
Australia and New Zealand.
Multi-Tech Internal Modem Settings
Since the Multi-Tech modem are universally compatible with most telephone
systems, no further reconfiguration of the default settings should be necessary.
International support
In some cases, the default initialization string for the internal (Multi-Tech) modem
may need to be changed depending on the country it is used in. Countries not listed
below are compatible with the default (North American) settings:
Hong Kong, Hungary, India, Indonesia, Israel, Korea, Malaysia, Philippines,
Poland, Singapore, Slovenia and Vietnam
AT%T19,0,30
Czech Republic
AT%T19,0,25
Japan
AT%T19,0,10
AT Commands for the Multi-Tech Modem
The following table summarizes the compatible AT commands for ION meters
equipped with the Multi-Tech internal modems:
Command Values Default Description
AT
Attention Code
n/a
The attention code precedes all command lines except
A/, A:, and escape sequences.
A/ Repeat Last Command n/a
Repeat the last command string. Do not precede this
command with AT. Do not press ENTER to execute.
Bn
Communication
Standard Setting
n = 0–3, 15, 16 1 and 16
B0 Select ITU-T V.22 mode when modem is at 1200
bps.
B1 Select Bell 212A when modem is at 1200 bps.
B2 Deselect V.23 reverse channel (same as B3).
B3 Deselect V.23 reverse channel (same as B2).
B15 Select V.21 when the modem is at 300 bps.
B16 Select Bell 103J when the modem is at 300 bps.
Nn Modulation Handshake n = 0 or 1 1
N0 Modem performs handshake only at
communication standard specified by S37 and the B
command.
N1 Modem begins handshake at communication
standard specified by S37 and the B command. During
handshake, fallback to a lower speed can occur.