
Sequence to reset modem from serial port:
+++ ; to get into command mode of local modem
OK  ; response from modem if its attention is grabbed
atz ; to reset the modem
OK  ; response from modem
NO CARRIER ; response from modem as it starts training  and negotiation 
CONNECT 38400 ; response from modem when in goes on line with remote
                modem.


Things to add to ref2ew:
1. Decode unit number in DT packet, use to identify the packets.

2. Consider putting multiple TTY's in one program, use select() to listen to
them all.
