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HC25 AT Command Set - Portech.com.tw

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<strong>HC25</strong> <strong>AT</strong> <strong>Command</strong> <strong>Set</strong><br />

4.2 <strong>AT</strong>&C<br />

s<br />

4.2 <strong>AT</strong>&C <strong>Set</strong> Data Carrier Detect (DCD) Line mode<br />

The <strong>AT</strong>&C <strong>com</strong>mand determines how the state of the DCD line (circuit 109) of the virtual modem COM port<br />

reflects the <strong>HC25</strong>'s internal activity.<br />

Syntax<br />

Exec <strong>Command</strong><br />

<strong>AT</strong>&C[]<br />

Response(s)<br />

OK<br />

Reference(s) PIN USB0-MDM USB0-APP Last<br />

V.250 + + + -<br />

Parameter Description<br />

(num)<br />

[0] DCD line shall always be on.<br />

1 DCD line shall be on only when data carrier signal is present.<br />

2 (&F) <strong>Set</strong>ting winks (briefly transitions off, then back on) the DCD line when data calls<br />

end.<br />

<strong>HC25</strong>_<strong>AT</strong>C_V01.200 Page 64 of 290 7/25/07<br />

Confidential / Released

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