--- a/doc/RTP-BFI-extension	Thu Apr 06 20:51:30 2023 -0800
+++ b/doc/RTP-BFI-extension	Thu Apr 06 21:30:33 2023 -0800
@@ -1,3 +1,12 @@
+NOTE: This document describes the old BFI representation format that was used
+by Themyscira Wireless for a few months from late 2022 into early 2023.  We no
+longer use this format, instead we have a new, bolder extended payload format
+for FR & EFR codecs, defined and described in the new RTP-TRAUlike-format
+document.
+
+Original document follows
+=========================
+
 We (Themyscira Wireless) have invented our own non-standard extension to the
 generally accepted standard for RTP-based transport of GSM FR and EFR traffic
 within a GSM RAN, on stretches running from a BTS to a TRAU-like component.