Fast and resilient call routing is important to have a great VoIP experience. DNS SRV is a technology that helps your VoIP phone route calls to the closest Dash datacenter and in the event of maintenance, technical incidents, or internet interruptions, transparently re-route calls to one of our geographically dispersed, redundant datacenters.
Phones that support NAPTR/SRV records must be configured using one of the below NAPTR/SRV records on the outbound proxy setting:
- proxy-west.virtualpbx.net
- proxy-east.virtualpbx.net
NAPTR/SRV records provide a redundant mechanism where phones failover to their closest datacenter when any loss in performance occurs at their primary datacenter. For example, if a phone is configured using the “proxy-east.virtualpbx.net” it will try to place calls on the EAST datacenter and failover to the CENTRAL datacenter should any issue arise. Failover paths operate as follows:
- West → Central → East
- Central → East → West
- East → Central → West
Phones available for auto-provisioning in Dash will be configured correctly and will require no further action. Detailed instructions for updating NAPTR/SRV records are available for the following brands. Don’t see your brand? Contact 24/7 support at support@virtualpbx.com, by calling 888.825.0800, or reaching out in live chat.
- Cisco
- Yealink
- Polycom
Cisco
Ensure the Outbound Proxy has the NAPTR/SRV record for the datacenter that is geographically closest to you and “Use DNS SRV” and “DNS SRV Auto Prefix” are enabled.
![](https://www.notion.so/image/https%3A%2F%2Fvirtualpbxstg.wpengine.com%2Fwp-content%2Fuploads%2F2019%2F09%2Fcisco.png?table=block&id=d66723ad-feb0-416b-b68c-0b19c2fa071e&cache=v2)
Yealink
Ensure Enable Outbound Proxy Server is Enabled and Outbound Proxy Server 1 has the NAPTR/SRV record for the datacenter that is geographically closest to you with Port 0.
![](https://www.notion.so/image/https%3A%2F%2Fvirtualpbxstg.wpengine.com%2Fwp-content%2Fuploads%2F2019%2F09%2Fyealink.png?table=block&id=5a5d8c06-686c-469e-b0cb-ec79c3b360b3&cache=v2)
Polycom
Ensure the NAPTR/SRV Address contains the datacenter geographically closest to you, Port is set to 0, and Transport is set to DNSnaptr.
![](https://www.notion.so/image/https%3A%2F%2Fvirtualpbxstg.wpengine.com%2Fwp-content%2Fuploads%2F2019%2F09%2Fpolycom.png?table=block&id=ce7cb786-8c41-4e41-8e89-3a38fb3b2119&cache=v2)