a notebook on digital identity, telecom trust, and internet standards.
I'm Chris Wendt — I came up through real-time communications, from audio DSP, media streaming and codecs, and telecom protocols to the cryptographic trust frameworks for digital identity I work on now.§
Recent entries
Long-form entries — the opinionated half of appliedbits.
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toward a multimedia telephone network
Argued on the consumer-protection panel at the FCC's IP Transition Workshop, then written up at length: real-time text, video relay and NG911 as native capabilities of the telephone network, not bolt-ons on a voice path.
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notes from the fcc ip transition workshop
Notes from the FCC's two-day IP Transition Workshop, July 15-16, 2026 — the four panels of day one, what was argued about all-IP interconnection and bill-and-keep, and a longer account of the panel I sat on.
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DNO+: making DNO additive
Do Not Originate is default-deny on calling-number provenance, and it stops at numbers that cannot or will not originate. The case for an additive tier: let the right-to-use holder declare who may originate its calls.
Recent dispatches
Recurring series on what's moving across telecom, identity, trust, and fraud.
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Regulatory Watch — Week ending October 23, 2026
Replies on Club for Growth’s request to send AI-voiced political robocalls to cell phones without consent were due Monday, October 19, fifteen days before the November 3 election. The same week, NTCA and Inteliquent each told Wireline…
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Sector Watch — Week ending October 23, 2026
The IETF DMARC working group revised its document retiring ARC on October 21, and the document’s stated core lesson is that signatures are not trust. ARC let each mail intermediary sign a record of what it saw, but a receiver could on…
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Regulatory Watch — Week ending October 16, 2026
The rest of the October 9 comments on the Robocall Mitigation Database FNPRM posted this week. CTIA, T-Mobile, NCTA, and INCOMPAS with the Cloud Communications Alliance all back Bureau review of a filing before it appears in the database. C…
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Sector Watch — Week ending October 16, 2026
The IESG sent the IETF STIR working group’s proposed charter to external review on October 16, with an approval decision scheduled for the November 5 telechat. The new scope is entity identification. The charter states the gap: STIR a…
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Regulatory Watch — Week ending October 9, 2026
Comments on the Robocall Mitigation Database FNPRM were due October 9, and USTelecom, Numeracle and Ridgeway want the database to check who a filer is before it publishes anything. The Club for Growth comment round on AI-voice political cal…
Recent field notes
Short pieces flagging what's notable across the same beats.
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GASA's Asia survey: 71% met a scam, US$136.5 billion estimated lost
GASA released its State of Scams in Asia 2026 survey on October 21. Opinium surveyed 17,460 adults in 13 markets between March 16 and April 13, and the survey was developed with Gogolook, which makes the Whoscall caller-ID and anti-scam app…
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Ofcom fines Tismi £437,500 over 366,000 sub-allocated numbers
Ofcom fined Tismi BV £437,500 on October 21 for failing to stop scammers misusing its phone numbers. Tismi, part of Link Mobility, sub-allocates numbers to its own customers. Ofcom found it breached General Conditions B1.6, B1.8 and B1.9(c)…
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Eight eMudhra intermediate CA keys could be recovered from their own certificates
Dennis Jackson of Mozilla published a disclosure on October 20: the private keys of eight eMudhra intermediate CA certificates are compromised. The intermediates chain to roots in the Mozilla, Microsoft, Apple and Chrome root programs. Six …
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Schumer files against the Club for Growth AI-voice waiver on the reply deadline
Senate Democratic Leader Chuck Schumer filed a comment in CG Docket No. 02-278 on October 19, the reply deadline, asking the FCC to deny Club for Growth’s petition for an expedited waiver. The petition would let callers place noncomme…
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FCC removes Mexico IP Phone from the RMD over a forged numbering notice
The FCC Enforcement Bureau removed Mexico IP Phone LLC from the Robocall Mitigation Database on October 16 (DA 26-1116, EB Docket No. 22-174), finding its certification “willfully deficient.” Intermediate and voice service provi…
Library
The factual half — how things work and what the standards say, with references to the authoritative documents.
SIP · STIR/SHAKEN · Telephone numbers · ENUM · DNS and domain trust · vCon · VESPER · Trust governance · Telecom regulation · Digital identity · IETF · Glossary