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We recommend adding a Fail-safe number for each of your Tracking Numbers. This is the backup receiving number where calls will go if CallTrackingMetrics is down and cannot follow advanced routing options.
Fail-safe numbers are set up at the Tracking Number level. To configure, go to Numbers > Tracking Numbers. Click “edit” next to the Tracking Number where you wish to add a Fail-safe number. Go to the Fail-safe Number area of the editing page. Once you enter your Fail-safe number, you can choose to also save your Fail-safe number to multiple tracking numbers so you don’t have to do them one by one.