read the 1.6 README and the 1.8 README.
If you're using SIP you should expect changes with account
authentication, faxing, output regarding channel status and
performance.
I think that version of 1.4 is late enough you would already be on
DAHDI for hardware devices. If not, you need to convert to
What sort of things should I watch out for when upgrading from 1.4.39 to 1.8.5
Thanks,
--
Joseph
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