The main computer is listening to the 440.550 with
a of PL110.9.
The DTMF commands should go through 440.550 for
less errors. The reason for this is because ID's, tones,
etc.will not heard on the Internet.
To access a node, key up for 1/2 second then enter
# node number.
To disconnect, key up for 1/2 second, enter 7 or
73. There is a transmit limit of 180 seconds, and
an inactivity timer of 15 minutes.