503 · SERVICE_UNAVAILABLE

Connection status unavailable

The network serving this line did not answer, so its connection status could not be read.

When it occurs

A line's connection status is read and the network serving the line fails to answer.

What to do

Retry in 5 minutes. A failed read is answered again for the rest of its 5-minute window, so retrying sooner can return this same answer.

Returned by

Type

https://developer.telgea.com/errors/number-service/CONNECTION_STATUS_FAILED