Specifications

MultiModem ISI Hybrid Series, ISIHI-2S/2U 153
Appendix
COMMAND DESCRIPTION
Ds Data Compression Control
s = phone #
Dial telephone number s, where s may include up to 40 alphanumeric characters,
including L. (Can also include the following dial string modifiers, which modem accepts
but ignores function: P, T, V, W, comma ( , ), colon ( : ), semicolon ( ; ), !, $, @, and ^.
&Dn Data Terminal Ready Control
n=0, 1, 2, or 3
&D0 Modem ignores DTR signal
&D1 When DTR drops while in online data mode, the modem enters command mode,
issues an OK, and remains connected
&D2 When DTR drops while in online data mode,t he modem hangs up
&D3 When DTR drops, modem hangs up and resets as if ATZ command was issued
DSn Dial Store Telephone Number
n = 0, 1, 2, or 3
Dial a number previously stored in directory number n by &Zn= command. For example,
ATDS3.
En Echo Command Mode Characters
n = 0 or 1
E0 Do not echo command mode characters
E1 Echo command mode characters
F Dummy command
&Fn Load Default Configuration
n = 0
&F0 Load factory default values as active configuration
&Gn Guard Tones (International model only)
n = 0, 1, or 2
&G0 Turn off ITU-T guard tone
&G1 Turn on ITU-T 550 Hz guard tone
&G2 Turn on ITU-T 1800 Hz guard tone
Note: the UK model is locked to &G2, which turns on the ITU-T 1800 Hz guard tone.
Hn Hook Control
n = 0 or 1
H0 Go on-hook (hang up)
H1 Go off-hook
In Information Request
n = 0, 3
I0 Display controller firmware version number
I3 Display controller firmware version number