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AT Commands Set

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SIM5320 <strong>AT</strong> Command <strong>Set</strong><br />

OK<br />

9.21 <strong>AT</strong>+CECM Enable/Disable Echo Canceller<br />

Description<br />

This command is used to select the echo cancellation mode. Each audio channel has own default<br />

echo cancellation mode. For example:<br />

Handset: at+cecm=1(default open)<br />

Headset: at+cecm=2(default open)<br />

Speaker: at+cecm=4(default open)<br />

PCM: at+cecm=5(default open)<br />

SIM PIN References<br />

NO Vendor<br />

Syntax<br />

Test Command<br />

<strong>AT</strong>+CECM=?<br />

Read Command<br />

<strong>AT</strong>+CECM?<br />

Responses<br />

+CECM: (list of supported s)<br />

OK<br />

Responses<br />

+CECM: <br />

OK<br />

Write Command<br />

<strong>AT</strong>+CECM=<br />

Responses<br />

OK<br />

ERROR<br />

Defined values<br />

:<br />

0 : disable EC mode<br />

1 : EC mode recommended for HANDSET<br />

2 : EC mode recommended for HEADSET<br />

3 : EC mode recommended for HANDSFREE<br />

4 : EC mode recommended for SPEAKER<br />

5 : EC mode recommended for BT HEADSET<br />

6 : EC mode recommended for aggressive SPEAKER<br />

7 : EC mode recommended for medium SPEAKER<br />

8 : EC mode recommended for least aggressive SPEAKER<br />

Note:<br />

1. EC mode of 6, 7, 8 can be adjusted by +CECSET command<br />

2. User should use this <strong>AT</strong> command together with other related audio <strong>AT</strong> commands like “CSDVC ”,<br />

SIM5320_<strong>AT</strong>C_V1.24 206<br />

8/14/2012

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