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Model 4010 Phone Patch Card
Programming
You may use CPSW to add the extra buttons you will need to control the phone channel(s).
(See
on page 79.) The channel numbers are fixed, channel 13 for LINE 1
and channel 14 for LINE 2 (if the Dual Phone Patch Card is installed). Operation of the
phone channel will be much like that of a regular radio channel. The following buttons are
typically used for phone channels: Answer Hold (Off-Hook), Release (On-Hook), Switch
Hook Flash, Mute, Volume Adjust, and Patch. See the
Model 4010 Operator’s Manual
(P/
N 025-9226) for details on these buttons and other operating information.
Refer to the
Model 4010 Operator’s Manual
(P/N 025-9226) for complete operating
instructions.
Level Adjustments
Setting levels for the Phone Patch card will require access to the potentiometers on the
back unit and if an AC voltmeter is used, access to the test points on the Phone Patch card.
Two adjustments need to be made:
Phone-Line Hybrid Balance
- For proper balance adjustment, the Phone Patch card
should be attached to its intended phone line. Dial a phone number that can be answered
and silenced (no automated messages or loud background noises). Transmit a 1000 Hz
tone to the phone channel via the console. The Alert 1 key is normally programmed at the
factory for a continuous 1 kHz tone.
While monitoring the level at the receive audio test point, alternately adjust
potentiometers RBAL and CBAL at the back panel for a minimum signal. Note that the
signal at the receive audio test point will be present for only 2 or 3 seconds; therefore, it is
necessary to release the Alert key and press it again every 3 seconds.
Level from Phone Line
- Set the level to the Phone Patch card by monitoring an incoming
call and setting the VOX potentiometer so the CALL indicator will trigger on the
minimum audio level expected. This level should not be set to trigger on noise. If the level
is set to trigger on noise, incorrect PATCH operation will result. The volume level of this
channel going to the speakers can now be set for normal listening levels.
Test Point
P1
LINE 1 (Channel 13)
Transmit Audio
Receive Audio
5
4
LINE 2 (Channel 14)
Transmit Audio
Receive Audio
Ground
3
2
1