The Escort II requires two distinct antenna inputs via BNC connectors:

An internal intercom function is available through . When this pin is externally grounded via a switch and the microphone key line is open, the microphone audio is amplified directly to the headphone outputs. 5. Final Checks

: Make sure you have administrative access to the computer or device you are installing the software on. This is typically required for software installations.

Narco Escort II is a digital, "shared system" radio that functions as either a 720-channel COMM transceiver or a 200-channel NAV receiver with a built-in VOR/LOC indicator, though it cannot perform both functions simultaneously Bennett Avionics Core Installation Data

Since Narco Avionics declared bankruptcy in 2003 and their intellectual property was fragmented, official sources are scarce. Here are legitimate channels to find the full manual (Part Number 057-001-0025, Revision 2 or later):

: An intercom function is available on Pin 12. When this pin is grounded through an external switch while the mike key line is open, audio from the microphone bypasses the transmitter and is heard through the headphones.