u3g(4) incorrectly returning EOF

[Peter Jeremy]

I use a Huawei E176 on FreeBSD 8.1 for portable 3G connectivity.
Occasionally, ppp(8) reports:
Phase: deflink: read (2): Got zero bytes
Phase: deflink: open -> lcp
and ppp(8) brings the link down.  Trying to restart the link shows
that the E176 still thinks the link is up (entering 'term' and then
'~p' restores connectivity).  grog@ has similar problems with an E1762.

Can anyone suggest why u3g(4) is incorrectly reporting EOF to an
application?

-- 
Peter Jeremy
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