ZETRON 4000 Series Installation Manual page 305

Selecting the Default Audio Source
This selection defines which microphone and speaker are active according to the console
configuration.
In all but unusual situations, the selection "Spare input #9 steered" should be chosen. This
selection allows for console configurations with different combinations of gooseneck
microphone, desk microphone, headset, and TRHI (Telephone/Radio Headset Interface)
connections. The other selections, "Dynamic MIC" and "Electret MIC" are not applicable
to the IntegratorRD workstation.
"Spare input #9" steering, detects the state of a headset jack and phone hook switch to
direct microphone audio depending on the PTT selection. If the system does not have a
headset or TRHI, the default states for these switches provide for normal operation of a
standard gooseneck or desk microphone.
These abbreviations are used in the following look-up tables.
Transmit buttons:
Microphones:
Audio Output:
Table 103 and Table 104
Table 103: Microphone Source Look-up Table
PTT SWITCH HEADSET JACK
D.PTT (do not care)
E.PTT Plugged in
Removed
X.PTT Plugged in
Removed
Table 104: Receive Audio Output Look-up Table
HEADSET JACK
Plugged in
Plugged in
Removed
* When a headset is plugged in to the TRHI with the phone off-hook and no PTT is
pressed, the headset mic will be open to the phone and phone audio will be heard through
the headset.
D.PTT = Gooseneck/desk Mic PTT
E.PTT = Footswitch or Headset PTT
X.PTT = Screen or Keyboard XMIT
D.MIC = Goose/desk Mic
E.MIC = Handset or Headset Mic
SPKR = Console panel Speaker
HDST = Headset speaker
identify the different modes.
PHONE (TRHI)
(do not care)
(do not care)
(do not care)
(do not care)
(do not care)
PHONE (TRHI)
On-hook HDST
Off-hook SPKR
(N/A) SPKR
System-Specific Definitions
MIC SOURCE
D.MIC
E.MIC
D.MIC
E.MIC
D.MIC
RX AUDIO PHONE AUDIO
(N/A)
HDST *
(N/A)
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