Automated failover

By default, rest-ww.telesign.com and rest-api.telesign.com provide automated failover attempts for any 500-509 HTTP responses. This is independent of the client and will retry all available Telesign locations prior to sending a client response. This failover is very rarely triggered and will only be seen by the client as additional processing time. There is no setup or special configuration to use this feature.

Failover is enabled by default for all products except for Voice. This feature is not enabled for any Voice products and cannot be used with Voice. It can be disabled per request on any product by adding the following HTTP header:

auto-failover: false

If failover is triggered, the response time is typically twice as long the standard API response time experienced by the client location. This added latency can be up to three to four times as long depending on the situation. Typical HTTP read timeouts easily allow for this extra latency if failover occurs.