Wholesale providers that only receive/terminate pre-signed calls don't
need a STIR/SHAKEN signing certificate. Info box explains: originating
providers must sign with own cert (as of June 2025), but
terminating-only providers just verify signatures (software config)
and file RMD as "partial implementation."
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>