WHOLE CHARACTER
通tōng
to go through; to connect; to lead to; to understand thoroughly; to communicate; to convey; all; whole; through; common; general
通 wraps 甬 in the walking side: to go through and connect — 交通, 通过, 通知, 普通.
ZDIC: 形声,从辶、甬声 — the walking wrapper around 甬 as the sound side.
OUTER FRAME: THE WALKING SIDE — GOING THROUGH
辶chuò
walk; movement (from 辵)
The walking wrapper; a bound radical form, not a standalone page.
In 通: outer frame: the walking side — going through Shown with its documented or clearly limited role.
INNER: THE OLD SOUND SIDE 甬 (YǑNG)
甬yǒng
the handle of ancient bells; used in place names
A standalone character (yǒng, literary); when a character keeps it as a piece, the sound role is stated on that character's page.
In 通: inner: the old sound side 甬 (yǒng) A historical sound side, not a modern hint: tōng shares only the final -ong with yǒng; the initials (t-/y-) and tones (1/3) differ.