PS Engineering PMA5000EX Pilot’s Guide - Manual (Page 5)

202-550-0100 Page 5 Jan 2010 PMA5000EX Pilot Guide
AUX Source Muting
AUX 1 and AUX 2 have a tem-
porary muting function. When
you select AUX 1 or AUX 2,
and want to silence that audio
source temporarily you can hold
the AUX 1 or 2 button for more
than one second, and the audio
be deselected for the next 60 seconds. It will then return to the “ON”
state. This is useful if you want to silence an audio advisory signal
temporarily, but don’t want to forget to switch it back on .
Telephone ( § ) (9)
The TEL mode serves as a full duplex interface and distribution for
telephone systems such as portable cellular phones
with earpiece jacks. When you press the Telephone
button, it connects the cell phone to the headsets,
like adding another person on the intercom loop.
This connects the telephone to the people on the
airplane as follows:
In ALL intercom mode, all crew and passengers will be heard on the
phone when they speak. Com and other selected radio audio is also
heard in the headsets. If the pilot or copilot pushes the radio PTT,
their mic will be transferred to the selected Com radio. The telephone
party will not hear ATC communications, and vice versa.
In CREW mode, only the pilot and copilot are connected to the tele-
phone. Passengers will not hear the telephone. The pilot and copilot
will also have transmit capability on the other selected transceiver.
In ISO intercom mode, when the PMA5000EX is in the TEL mode,
the pilot position is in the "Phone Booth." Only the pilot will hear or
be heard on the telephone. The pilot will also have access to Com 1 or
2, and will transmit on that radio using the PTT. All selected audio is
provided to the pilot.
Note: As shipped from PS Engineering, the PMA5000EX does not provide cellular telephone sidetone
(the user’s voice fed back to the headset). Some cell phones do not provide sidetone. However, tele-
phone sidetone can be enabled by pressing the holding the TEL button for more than three seconds.
Because the cell-phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use, unless sidetone is present.