Rockwell RCV144ACx, Command Reference Manual, Page: 158 / 186

AT Command Reference Manual
7-26 1048
Originating a Call in Speakerphone Mode
To initiate a call with the speakerphone, issue:
AT#CLS=8
AT#VRN=0
AT#VLS=6 (Selects the speakerphone)
It is recommended to set the VRN command to 0 which disables ringback detection before reporting the VCON message.
ATDT<number>
The modem then responds with:
VCON (based on the AT#VRA and #VRN setting)
Additional DTMF (for example in a voice mail application) can be entered by issuing:
AT#VTS=<digit>
When DTMF digits are sent, it is recommended that the default value of the tone length be changed to 100 ms using the
command #VBT:
AT#VBT=1
The call can be transferred (PBX function) by entering the flash dial modifier (AT#VTS=!).
Terminate the call with:
ATH
Answering a Call in Speakerphone Mode
To answer a call in speakerphone mode, issue:
AT#CLS=8
AT#VLS=6 (Selects the speakerphone)
When the modem detects the ring, the modems reports:
RING
The DTE can answer with:
ATA
The modem sets the speakerphone and sends:
VCON
Terminate the call with:
ATH
Muting the Local Handset During Phone Conversation - Music on Hold
To mute the local handset during a phone conversation, issue the the following command:
AT#VLS=7 (valid after Voice On-line mode)
This command mutes the local handset by switching the handset or speakerphone out of the telephone line path if in
#VLS=0 or #VLS=6 mode.
To unmute, the host should issue an AT#VLS=0 or AT#VLS=6 to return to phone line or speakerphone mode, respectively.
On hardware designs which incorporate the audio codec, #VLS=7 can be used to route the codec's output through the
phone line to provide music-on-hold feature.