This guide explains STIR/SHAKEN call authentication for VICIdial call centers and why compliance alone is insufficient for call deliverability.
•STIR/SHAKEN is a cryptographic authentication framework (RFC 8224/8225/8226) that signs SIP calls; it authenticates identity but does NOT block or label calls as spam.
•Actual spam labeling is done by carrier analytics engines: T-Mobile (First Orion), AT&T (Hiya), and Verizon (TNS), which update their models every six minutes.
•Only Full Attestation (Level A) meaningfully improves deliverability; Level B and C calls are 3x more likely to be flagged as robocalls.
Full compliance requires 13 layers including CNAM registration, DNC scrubbing, TCPA cell identification, and Reassigned Numbers Database checks, costing $3,000–$18,000/month for a 50-seat center.
This summary was automatically generated by AI based on the original article and may not be fully accurate.
Meta
Dropbox
Spring
Google Cloud