Operating instructions

202-890-0402 Rev. 2 Page 5 Oct. 2010 PMA8000B Pilot Guide
Telephone (TEL) (9)
The TEL mode serves as a full duplex interface and
distribution for portable cellular phones with ear-
piece jacks. Pressing the TEL button activates the
telephone mode.
This connects the telephone to the users 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 PMA8000B is in the TEL mode,
the pilot position is in the "Phone Booth." Only the pilot will hear the
telephone, and only he will be heard. He will also have access to Com
1 or 2, and will transmit on that radio using the PTT. All selected au-
dio is provided to the pilot.
Speaker Amplifier (5)
The SPR in the lower right section stands for
speaker. This switch will place all selected audio
on the cockpit speaker when this switch is se-
lected. Except for the unswitched audio, the
speaker amplifier is not active in the "Split
Mode”.
Unswitched audio 1, 3 and 4 (the inputs dedi-
cated to autopilot disconnect, altimeter warning,
etc.) may come through the speaker regardless of the speaker button
position.
Depending on installation, important audio annunciations such as ra-
dar altimeter or autopilot disconnect will come over the speaker even
Note: As shipped from PS Engineering, the PMA8000B does not provide cellular telephone
sidetone (the user’s voice fed back to the headset). Some cell phones do not provide sidetone.
In PMA8000B Avidyne audio panels serial number X04748 and above, telephone sidetone
can be enabled by pressing the Shift (MON 1) and TEL buttons for more than one second.
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.