Campus Centrex Telephone Line Treatments

Each University of California at Berkeley centrex telephone line is assigned a treatment that defines what types of calls may be made or received. The principal use of line treatments is to restrict unauthorized long-distance calling. All treatments allow emergency dialing (911).

Some common administrative telephone line treatments and their effects are listed below.

Direct Dial Calling Area	Treatment Code
Worldwide	1
Campus Exchange Only	2
Local Area (no toll) and Toll Free Only	3
Nearby Area (415, 510, 650 and 925 Area Codes) and Toll Free Only	4
California and Toll Free Only	5
Domestic Only	6
Campus Exchange Only (no incoming) for Courtesy Phones	7
Domestic and Canada Only	8
Campus Exchange Only (no authorization code override)	10
Campus Exchange Only for Emergency Phones	26

For purposes of defining line treatments "Domestic" includes U.S.A. states, Puerto Rico and U.S. Virgin Islands. "Domestic" does not include American Samoa, Commonwealth of the Northern Mariana Islands (C.N.M.I.) or Guam.