Sorenson ntouch VP User Manual page 44

Use Voice Carry Over (VCO)
Step 6. Select the
Because the 1-Line VCO feature uses ntouch VP's built-in audio hardware, you can make
SVRS VCO calls using just your ntouch VP. You will not need to have a separate voice
telephone for 1-Line VCO Calls.
If you want to enable the 2-Line VCO feature instead, go on to the next step.
Step 7. Select the
2-Line VCO option
Callback number
field
Figure 70: Audio Settings screen, 2-Line VCO enabled
Notice that enabling the 2-Line VCO feature has enabled the Callback number field.
The 2-Line VCO feature works exactly the same as in previous firmware releases. That is,
if you choose 2-Line VCO, you must enter a Callback number and you must have a
separate voice telephone of some kind available to you near your ntouch VP.
Note: After you enable either the 1-Line VCO or 2-Line VCO feature, all calls that you
make will be VCO calls. If you want to turn off VCO calling, you must return to the
Audio Settings screen to disable the VCO feature.
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OK button to exit the screen.
2-Line VCO radio button as shown below.
ntouch VP 8.0