Multitech MTCMR-H User's Guide download pdf (Page 45)

Chapter 3 – Supported GSM/WCDMA AT Commands

High Speed HSPA-H4 AT Commands Reference Guide (Document S000483A) 45

&T Auto-Tests

Description: This command runs various auto-tests.

Syntax:

Command Responses

Action Command:

AT&T[<n>]

No Read and Test Commands

Values: <n> Auto-Test Activation

0 Perform software auto-tests

1 Execute the audio loop test (close)

2 Stop the audio loop test (open)

Examples:

Command Responses

AT&T0

Note: Perform software auto-

tests

Note: No software problem detected; all checksums are

correct

Notes:

AT&T command has to be used when the MS is registered in order to process the AUDIO

test loop correctly.

Caution:

The audio loop activation (enabled with AT&T1 command, disabled with AT&T2 command)

involves some restrictions on the use of other AT commands.

• Audio loop mode must not be enabled when a communication is active.

• Audio loop mode must not be enabled when a tone is under generation.

• Audio loop must be disabled (if active) before opening a communication;

• Tone generation and Side Tone modification must not be possible when the audio

loop is active.

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Multitech MTCMR-H User's Guide Page 45