dispatcher on TV show Emergency!

LACoFD Dispatcher Samuel Lanier portrayed himself in an uncredited
voice role (over the radio) throughout the series, and he is also
occasionally shown in a brief clip at the dispatch office just before
a dispatch is heard in later seasons. Lanier, an actual LACoFD
Dispatcher, retired from the department shortly after Emergency!
finished.

from https://en.wikipedia.org/wiki/Emergency!