U.S. Forces Okinawa, Japan - Kadena Air Base

GENERAL INFORMATION
2. DEFENSE SWITCHED NETWORK (DSN) OPERATING PROCEDURES
a. GENERAL
DSN is the principal voice communications network within the Defense Communications System, providing nonsecure
direct distance dialing service worldwide through a system of government-owned and leased automatic
switching facilities. The purpose of DSN is to handle essential command and control, operations, intelligence, logistic,
diplomatic and administrative traffic.
b. PRECEDENCE
The Joint Uniform Telephone Communications precedence system is directed for use by all authorized users of the
voice communication facilities of the Department of Defense. Since the effectiveness of the system depends on cooperation
on the part of the persons authorized to employ it, users must be familiar with the purpose to be served by
each precedence category and the types of calls which may be assigned the respective precedence.
c. USE OF THE DSN
(1) Will be authorized for OFFICIAL calls and restricted to:
(a) Only calls that are essential and require a timeliness that cannot be obtained by other means.
(b) The minimum time required to accomplish the official business and not normally exceeding 5 minutes.
(c) Valid Health, Morale, and Welfare calls as defined in the appropriate CINCPAC directives.
d. TELEPHONE MONITORING
The DSN system is provided for transmission of official government information and is subject to monitoring at all
times. Use of the DSN system constitutes consent to being monitored.
e. PERSONAL CALLS
Personal and unofficial calls over the DSN system are prohibited, except as noted above.
f. DSN DIALING INSTRUCTIONS
(1) Operator Assisted:
(a) At U.S. Air Force Base to place a call with a higher precedence than routine, dial the following numbers:
Dial Precedence
92 IMMEDIATE
93 PRIORITY
94 ROUTINE
(2) Direct Dial: All Class A subscribers may direct dial DSN numbers in the Pacific area at routine precedence
by dialing the seven-digit DSN number (Dialing must be completed without delay; a pause of 15 seconds or more
will result in a busy signal.)
(3) For Operator Assisted Call: All users should provide the DSN operator with the following information:
(a) The precedence of the call.
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