[Freeswitch-dev] Level3 and 25s failover
tomp at tomp.co.uk
Sat Aug 11 18:02:03 MSD 2012
The company I work for get toll-free numbers from Level3 via
Bandwidth.com which are terminated on several Freeswitch servers using
DNS SRV records.
Annoyingly Level3 have a 'feature' where they will failover a call to a
different server if the call is not answered in 25 seconds.
In the UK, the provider we use has a similar failover setting, but as
soon as early media is sent the fail-over mechanism is stopped and you
can ring for as long as you need to.
I have been told by Level3 that it is a known issue, but not something
they can/will change, and that calls should be answered within 25 seconds.
I tend to agree, however I forward calls to our customer's PSTN numbers,
and they do not always answer within that time.
This causes duplicate call records when the call fails over. For a call
analytics company, this causes serious problems in statistics.
Does anyone have any experience with Level3 and this strange behaviour?
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