DTMF

Assess

Techniques

Dual-tone multi-frequency signaling used for telephone keypad commands.

Why it's here

Placed in Assess: 1 article(s) of evidence from 1 source(s), led by product launches, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

3Hacker News·10/12/2026product_launch
Phreak.ing Anonymous Internet PBX and Phone Switch
Phreak.ing is an anonymous Internet-based PBX and phone switch that exposes a wide set of dial codes for calling, forwarding, voicemail, conferencing, paging, and intercom functions. It also supports text commands and community voice rooms, and states that it does not keep logs or require real personal phone numbers for signup.