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MultiModemISI Hybrid Series, ISIHI-2S 153
Appendix
&D
n
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, the modem hangs up
&D3 When DTR drops, modem hangs up and resets as if ATZ command had been issued
DS
n
Dial Stored Telephone Number
n
= 0, 1, 2, or 3
Dial a number previous stored in directory number
n
by &Z
n=
command. For example, ATDS3
E
n
Echo Command Mode Characters
n
= 0 or 1
E0 Do not echo command mode characters
E1 Echo command mode characters
+ES=6 Enable Synchronous Buffered Mode
Allows an H.324 video application direct access to the synchronous data channel. On underflow,
the modem sends the HDLC flag idle (0x7E) to the remote modem. This special error correction
mode is overridden by any of the following commands: &F, &M, &Q, and \N.
+ES=? Shows the only allowed value
F
n
Echo Online Data Characters
n
= 1
F1 Disable online data character echo (included for backward compatibility with some
software)
&F
n
Load Default Configuration
n
= 0
z&F0 Load factory default values as active configuration
&G
n
Guard Tones (International model only)
n
= 0, 1, or 2
&G0 Turn off ITU-T guard tones
&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.
\G
n
Modem Port Flow Control
n
= 0
\G0 Returns an OK for backward compatibility with some software.
H
n
Hook Control
n
= 0 or 1
H0 Go on-hook (hang up)
H1 Go off-hook
I
n
Information Request
n
= 0, 1, 2, 3, 4, or 9
I0 Display default speed and controller firmware version.
I1 Calculate and display ROM checksum (for example,12AB)
I2 Check ROM and verify the checksum, displaying OK or ERROR
I3 Display default speed and controller firmware version
I4 Display firmware version for data pump (for example, 94)
I9 Display country code (for example, NA Ver. 1)
&J
n
Auxiliary Relay Control
n
= 0
&J0 The auxiliary relay is never closed.