To elaborate on what I'm saying with some isolated issues....

Some devices are apparently still sending the Line 2 registration before Line 1 which is canceling Line 1 out when it periodically re-registers. We're going to go ahead and roll out the new 2 Line method this weekend, but can make that change now for anyone having issues.

With the new clone line setup, the 2nd line will be using separate SIP credentials and registering independently so the two can never affect each other. That way even if for some odd reason, the ATA sends both at the same time or out of order, it won't matter. The old firmware consistently sent them in order...the new seems to only do that sometimes.

We've only seen a few reports of this so far and from logs it's not affecting many, but like I said we're going to roll out the new 2 line method anyway to prevent it for those it is affecting (and just not reporting it).