Compaq Armada 1500 Service Manual Addendum

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Addendum to Compaq Armada 1500
Maintenance and Service Guide
24 Addendum 255318-001 to Guide 284820-001
Table C-2, AT Commands,
Continued
Command Description
&P Pulse Dial Make/Break Ratio Selection. Non-adjustable in some countries. In those
countries the &P command shall be accepted and ignored. This command is effective only
for Japan.
0: Make/break ratio 34/66% (default
1: Make/break ratio 33/66%
&Qn Asynchronous Communications Mode. This setting also affects the usage of the DCD, DTR,
CTS, and DSR signals in the DTE interface.
0: Asynchronous Mode, buffered. Same as \N0 or \N1
1: Reserved
2: Reserved
3: Reserved
4: Reserved
5: Enables error control mode, same as \N3. Same as \N3. (Default)
6: Selects asynchronous mode with Automatic Speed Buffering, ame as \N0.
7: Reserved
8: MNP error control mode. If an MNP error control protocol is not established, the
modem will fall back according to the current user setting in S36.
9: V.42 or MNP error control mode. If neither error control protocol is established, the
modem will fallback according to the current user setting in S36.
&Sn Data Set Ready (DSR) Selection. &Sn selects DSR action.
0: DSR always ON (default).
1: DSR is OFF when the modem is in the idle state, and when the modem is in a test
mode. DSR circuit is turned ON at the start of the handshaking process. DSR is turned
off when the hangup process is started.
&Tn Self-Test Commands. &Tn allows the user to perform diagnostic tests on the modem.
These tests can help to isolate problems when experiencing periodic data loss or random
errors.
0: Abort. Stops any test in progress.
1: Local analog loop. This test verifies modem operation as well as the connection
between modem and computer. Any data entered at the local DTE is modulated, then
demodulated and returned to the local DTE. To work properly, the modem must be
off-line.
3: Begin digital loopback. &T3 is not allowed if an error control connection is in progress.
6: Remote digital loopback test. This test can verify the intregrity of the local modem, the
communications link, and the remote modem. Any data entered at the local DTE is
sent to and returned from, the remote modem. To work properly, the modems must
be on-line with error control established.
&V View Active Configuration and Stored Profile. &V is used to display the active profiles.
0: View active and store profile.
1: Display active profile and stored profile.
&Wn Store Current Configuration. &Wn stores certain command options and S-register values
into the modem’s nonvolatile memory. The ATZ command or a power-up reset of the
modem restores this profile.
0: Save active profile to user profile.
1: Not Supported. Will generate an ERROR.
&Yn Designate Default User Profile. &Yn selects the user profile to be loaded upon power-up (or
hardware reset). This command does not change the behavior of the modem but is
included for compatibility with applications that issue the &Y0 command.
0: Select stored profile 0
1: Selects user profile 1(this generates an ERROR)
Continued

Compaq Armada 1500 Specifications

General

Brand	Compaq
Model	Armada 1500
Category	Laptop
Language	English