TELEPHONE CENTRAL OFFICES

NORTH BAY CENTRAL OFFICES

SANTA ROSA "MAIN" CENTRAL OFFICE

PACIFIC BELL/SBC TANDEM and AT&T TOLL OFFICE

  The Santa Rosa "Main" central office serves Pacific Bell/SBC as the main regional tandem for the North Bay-Sonoma area of California and AT&T for long distance and toll services.  The office was originally built by Pacific Telephone and Telegraph Company (later Pacific Bell) in the 1930s then added onto and modified in the 1960's through 1980s with a more modern, typical windowless concrete structure.  Although some interesting designs and colors were used to the most recent additions.  Santa Rosa became an AT&T Long Lines microwave hub when TD-2 microwave service was introduced in the early 1960s with connections to Cloverdale, Burdell Mountain, Cazadero and Berryessa Peak.  Santa Rosa was a primary office in the hierarchy switching plan and had direct trunk groups to the Oakland Sectional Office. AT&T installed #4A equipment in May 1975.  Santa Rosa serves as a back up to the Sacramento Regional Office for overseas traffic going through Point Arena Cable Station: PARNCA01

Microwave paths from Fresno were: Cloverdale, Burdell Mountain, Cazadero and Berryessa Peak.

  Overall building view.

   Newer 1970's additions..

  Interesting balcony sections on building face.

  Another view showing microwave structure.

  Most recent addition showing "modern" style and exterior facade.

Nice overall shot, southside, showing original building (left side) and recent additions to the right. Antennas here go to Burdell Mountain.

AT&T entrance.

Typical AT&T logo on the marble facade.

New SBC logo.

Microwave structure antennas pointed to Cloverdale.

View of antennas pointing to Cloverdale

Another view of microwave structure.

Closer view of structure.

Looking toward the west, antennas pointed to Berryessa Peak.

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