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PBS # 1(yellow dot) or PBX #2(green dot) telephone. The operator will announce
which system is operational. Only those numbers listed under the system working are
used for internal and external calls.
The Operator will announce over the PA system when all telephones are operational
External Failure:
If the external phone company lines are out of order, the internal hospital switch may be
working. Options if this happens are:- Cellular phones,
Civil defense radios, Runners,
Internal calls
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