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MTP2 T2 timer

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kulver:
Hi.

We are trying to setup SS7 between yate and service provider, but have an issue with ITU-T Q.781 tests.
Q.781 test's 1.2 purpose is "To check "Not Aligned" Timer T2".
According to chart, in case of "lost alignment", expected signal unit sequence should be:
SIOS
SIO  (timer T2 starts)
SIO
SIO
....
SIO (timer T2 expires)
SIOS

But, in our case, we can't see any second SIOS messages - it's only sends SIO without any pauses, timeouts or restarts.

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