Multitech MultiModem Cell MTCBA-C1 User's Guide download pdf (Page 36)

Chapter 9 – Call Control Commands

Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 36

Set Voice Privacy Level +WPRV

Description: This command requests the CDMA voice privacy level. CDMA voice privacy is an optional feature

of CDMA networks. Therefore, voice privacy will only become enabled during a voice call if the

base station supports voice privacy; otherwise this feature is unavailable on your CDMA carrier.

This command enables a request from the modem to the base station for voice privacy. If voice

privacy is activated by the base station, the unsolicited response +WPRV: 1 will appear indicating

the long code PN mask for the traffic channel has been scrambled by the base station. This

command may be issued before or during a voice call.

Note: When voice privacy is enabled, an audible alert will be generated if the state of voice

privacy changes (loss or establishment).

Syntax: Command Syntax: AT+WPRV=<voice privacy level>

Command Possible Responses

AT+WPRV=0

Note: Set to normal voice call

AT+WPRV=1

Note: Request a secure voice call

ATD18005551212;

+WORG: 18005551212

+WPRV: 1

+WCNT: 3

Note: Voice Privacy is now ON

AT+WPRV?

Note: Request current privacy setting

+WPRV: <voice privacy level>

Note: <voice privacy level> defined below

Values: <voice privacy level>

0 normal privacy (default setting)

1 enhanced privacy

Call Privacy Indication Unsolicited Response +WPRV

This response confirms that the call privacy level has changed during a call.

Response Syntax: +WPRV: <voice privacy level>

Result Example 1: +WPRV: 0

Voice privacy level change to “normal privacy”

Result Example 2 +WPRV: 1

Note: Voice privacy level change to “enhanced privacy”

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Multitech MultiModem Cell MTCBA-C1 User's Guide Page 36