
72 MultiModemISI Hybrid Series, ISIHI-2S/2U
Chapter 4—MODEM AT Commands, S-Registers, Result Codes
Phone Number Memory Commands
ISIHI-2S/2U modems can store up to four telephone numbers in nonvolatile memory. You
can store the numbers with the &Z command and dial them with the ATDS command.
&Zn=s Store a Phone Number
s = phone number
n= 0, 1, 2 or 3
Default: none
You can store a telephone number string in the modems phone number memory. You can
store four of these strings using the &Zn=s command. The memory locations are labeled
N0 through N3. For example, the telephone number 1-612-555-1212 is stored at memory
location N2 by typing &Z2=16125551212 and pressing ENTER.
DSn Dial a Stored Number
n = 0, 1, 2, or 3
Default: none
You can automatically dial a telephone number that is stored in the modems number
memory by typing ATDSn, where n = 0 through 3. For example, you can dial a number
stored at N2 by typing ATDS2 in terminal mode and pressing ENTER.
Configuration Storage and Recall Commands
The ISIHI-2S/2U stores parameters in two places. It stores factory default parameters in
read-only memory (ROM), and customized parameters in nonvolatile random access
memory (NVRAM). You cannot change the default parameters in ROM, but you can
change parameters in temporary memory and then store them in NVRAM as custom
settings. You can then recall the custom settings as if they were factory default settings.
&Wn Store Configuration
n = 0
Default: &W0
The &W command stores current AT commands and S-register values in nonvolatile
memory, so you wont lose your custom settings when you turn off the modem or reset it.
&W0 (or &W) stores all current AT command and S-register values in nonvolatile
random access memory (NVRAM) and configures the modem so it reads your custom
settings in NVRAM when the modem is turned on or when it is reset with the Z
command. The &F reset command continues to read the factory default settings in ROM.
&Fn Load Default Configuration
n = 0
Default: &F0
ISIHI-2S/2U modems store factory default AT command settings and S-register values in
read-only memory (ROM); they store your custom AT command and S-register values in
nonvolatile random access memory (NVRAM).
The &F0 (or &F) command resets modem to the factory default values stored in ROM.
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