Suggested 1200 baud Packet Parameters
by K7BFL  rev 11/1/2014

AirMail
RMS Express
AGW Packet Engine
Remarks
TxDelay
500 (ms)
500 (ms)
50 (ms x 10)
Time to delay audio after RF has started
Persistence
200
192
200
(1-255)  2=Wimp, 254=Bully
Slot Time
80 (ms)
80 (ms)
8 (ms x 10)
How often the TNC runs an algorithm to see if it can transmit
Max Frames
1
1
1
How many frames can be sent before requiring an acknowledgement.
Frack
5000 (ms)
5 (seconds)
5 (seconds)
Time to wait for an Ack before a Retry
Max Retries
5
5
5
Connection is closed after this limit is reached
Check Time
60 (seconds)

60 (seconds)
Time to wait before before Pinging and then a possible Reconnection
Packet Length
126 (bytes) ***
224 (bytes)
230 (bytes)
Maximum packet length to be transmitted
Response Time
200 (ms)

2 (ms x 100)
Minimum delay to wait after a clear channel before sending an
Acknowledgement.
TxTail


4 (ms x 10)
 Time between the end of packet data and the closing of the PTT circuit

Further Definitions and Suggestions from Santa Clara County ARES          

Sound Card Packet info by NM5RM  

*** If a Packet Length of more than 126 is used with AirMail, the packets lengths will alternate between the defined packet length (DPL) and [DPL - 126]