TeleCorder # TCwL-B4, V2.43, Revision 4, USA 7
3.3 Setting for Phone Line or Voice Activated Recording (VAR)
When you first connect a new TeleCorder, default settings for all channels will be for Voice
Activated Recording (VAR). Channels connected to phone lines should have their start/stop mode changed
to the voltage sensing start/stop mode. In this mode, instead of monitoring audio levels, the recorder will
monitor for DC voltages on the selected inputs to indicate on-hook and off-hook status. The phone line
voltage is high when the circuit is not in use and will drop to a lower voltage when it is being used. Any
channels set for on-hook/off-hook voltage sensing that are not connected to a phone line will not show any
recordings due to the lack of the DC voltage changes that are required to initiate a recording in this mode.
If you connect any of the TeleCorder inputs to audio sources that do not have standard on-hook/off-
hook voltages, these channels must be set for audio or voice activated recording (VAR).
3.4 VAR Settings (Voice Activated Recording)
Recorder channels set for the VAR mode will detect the voice level on the line to start a recording. It
will start recording when a preset audio level is reached (normal conversation levels), and stop after the
audio drops below this threshold (no sound other than weak background noise) for a preset period of time.
The length of quiet required for the recording to end is called “turn off delay”.
Phone Line Recording Voice Activated Recording (VAR)
Requirement
to Start
Phone Line DC voltage lower
than the threshold (<20v DC)
Audio level on input is loud enough or louder than
preset threshold required to start recording
Requirement
to Stop
Phone Line DC voltage higher
than the threshold (>20v DC)
Audio level is lower than preset level required to
continue recording for the selected turn off delay
Suggested
Uses
Recording from standard
Analog phone lines
1． Radio recording, broadcast or two-way
2． Amplified microphone
3． Audio picked up from handset or headset of
analog or digital telephone set (single or multi-
line phone)
4． Analog phone line recording where DC voltage
sensing cannot be used
Parameters
1. DC Voltage Threshold:
(This threshold is preset in the
TeleCorder through hardware
components and cannot be
changed via software).
1． VAR or Off-Hook Mode for each channel
2． Threshold in 4 levels
3． Turn off delay/VAR
space: (4, 12, 32, or 100
seconds)
4． VAR Time-Out to limit long recordings and start a
new recording: (20, 40, 60, or 80 minutes)
3.5 Setting Channels for Operation in VAR Mode
You use your PC to select Phone Line recording or VAR mode (Voice/Sound Activates Recording),
and to change and confirm these and other operating parameters.
3.6 Configuring TeleCorder using a PC
Using your PC with the TeleCorder program running, select Info & Settings from the main screen.
You will open the Hardware Info & Settings screen as shown on the next page. From this button you
will gain information about the TeleCorder including version number, capacity, media’s usage, recorded
call items, deleted call items, etc.
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