This is the third name and third location for LASD's third substation.
It was originally opened in August 1926 at 10817 S Vermont, and known as "Vermont Substation," and coincided with the opening that month of additional substations at Temple, Norwalk, and Newhall. "Florence Avenue" (now Firestone) and "Belvedere" (East L.A.) had already been open for some time.
"Vermont Avenue Station" was replaced by the new Lennox Substation in May, 1948.
LASD had no radios when Vermont Substation opened, and didn't get them until 1933 when LASD began contracting with LAPD for dispatching (on 1712 kcs) at 15¢ per call. In 1937 the Sheriff's Department got their own experimental 2-way license on 37.10 mcs which was used only by Belvedere units, and in 1938 the FCC granted them a regular 2-way licese on 31.90 mcs which went countywide once they got enough TX sites built and cars equipped. Apparently LASD didn't go to their long-time home in the 39 MHz range until after WWII.