I have a PPP connection between my BBB running Angstrom and my MacBook Pro, 
over a pair of 3DR radios (actually the Hobbyking version).

The radios work fine -- I can connect screen to each end and type to each 
other.
PPP works -- the log files don't have any errors.
ICMP works -- I can ping with no lost packets, latency of about 200ms, in 
both direction.
I can connect via SSH from one system to another, but it doesn't quite work 
as expected: It seems to 'lag' by one character. That is, if I type 
'ls<newline>' I will not see the output of ls until I type another 
character.

I don't think this is a problem at one end -- I can see radio link activity 
at both ends as soon as I type the character.

SSH via ethernet works as expected.

I welcome any ideas.

(As this is more an angstrom than a Beaglebone question, is there somewhere 
else I should be asking?)

Thanks,
  Tom

/etc/ppp/options on the BBB:

192.168.1.20:
ttyO1
57600
mru 296
defaultroute
noaccomp
nopcomp
lock
maxfail 0
lcp-echo-interval 60
local
ipcp-restart 20

/etc/ppp/options on OS X:

192.168.1.21:192.168.1.20
tty.usbserial-AM0263ME
57600
mru 296
debug
logfile /Users/tomd/tmp/ppp.log
noaccomp
nopcomp
nocrtscts
lock
maxfail 0
lcp-echo-interval 60
local
lcp-max-configure 10000

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