has behaviour changed with regard to SRV lookup. I am testing a D375 running firmware snomD375-SIP 126.96.36.199.
With previous snom models (3xx and 7xx), and in the absence of a NAPTR record, the phones would look for SRV records in the following order:
We have been using this on some domains to prioritise registration over TCP.
With the D375 it only tries to fetch the _sip._udp.example.com record.
If we add a NAPTR record then it will be fetched correctly and then the D375 will grab and use the SRV records as listed in the NAPTR.
At present we would need to add a NAPTR record for each customer domain, before we can deploy the D375 alongside the current functioning 3xx and 7xx phones!
thanks for contacting us,
the order in absence of NAPTR record should be SIPS, TCP, UDP also in 188.8.131.52 and D375.
I would like to convert this in a ticket to investigate a bit more.