User Manual

Reference Information
Modem Reference Information
Reference GuideStartup Guide 151
Register Function (Ambit) Range/units Default
S38 Delay before forced hangup 0-255/s 20
S39 Flow control bit mapped options status 3
S40 General bit mapped options status 104 (68h)
S41 General bit mapped options status 195(C3h)
S46 Data compression control 138
S48 V.42 negotiation control 7
S82 LAPM break control 128 (40h)
S86 Call failure reason code 0-255
S91 PSTN transmit attenuation level 0-15/dBm 10 (country
dependent)
S92 Fax transmit attenuation level 0-15/dBm 10 (country
dependent)
S95 Result code messages control 0
Selected Result Codes (Ambit)
Code Meaning
0 OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
5 CONNECT 1200
6 NO DIAL TONE
7 BUSY
8 NO ANSWER
Modem Reference (US Robotics)
In the following AT command table, default settings are shown in bold. All listed AT
commands except +++, /, and A/ must be preceded by “AT.”
AT Commands (US Robotics)
Command Function (US Robotics)
+++ Escape to online command mode (not preceded by AT)
/ Pause (not preceded by AT), 125 ms default
A Answer manually
A/ Repeat last command (not preceded by AT)
D... Dial a phone number and issue other optional commands: 0-9=Dial digit, T=Tone dial, P=Pulse dial, R=Call
an originate-only modem, W=Wait for second dial tone (X2, X4), @=Wait for answer (X3, X4),
(comma)=Pause in dialing, !=Flash switch hook, #=Auxiliary tone dial digit, *=Auxiliary tone dial digit, ;=Stay
in command mode after dialing, $=Wait for calling card bong, &=Wait for calling card bong, “=Dial the letters
that follow.
D$ Display a list of dial commands