Connection Points for Direct Routing

Connection Points


Connection points are load balanced automatically based on performance metricx and geographical proximity.

The FQDN’should always be placed in the correct order to

  • Provide Optimal Experience
  • Provide failover
Sip Connection FQDN Priority Comments
sip.pstnhub.microsoft.com 1 Primary FQDN
sip2.pstnhub.microsoft.com 2 Secondary FQDN
sip3.pstnhub.microsoft.com 3 Tertiary FQDN

The SBC makes a DNS query to resolve sip.pstnhub.microsoft.com. Based on the SBC location and the datacenter performance metrics, the primary datacenter is selected. Failover is based on the following locations

Primary Secondary Tertiary
EU US ASIA
US EU ASIA
ASIA US EU