MIL-HDBK-1191
auxiliary inputs shall be furnished to support Using Service provided devices.
11.13.2.4
Preamplifiers and Power Amplifiers.
Preamplifiers and power
amplifiers shall be provided.
11.13.2.5
Monitor Panel and Selector Switches. Monitor panel with selector
switch and speaker to check each zone output shall be provided.
11.13.2.6
Voice Input and Zone Selection. Microphone, zone selector switch
and telephone interface module for paging shall be provided. The number of
telephone subscriber lines provided will be based on the system configuration.
One subscriber line per zone or one subscriber line per system shall be
provided. Zone dial selection equipment shall be part of the PA system.
Control functions such as call answer, tone announcement before the page, and
automatic, preset time-out will be done by the interface module.
11.13.2.7
Input Selection Switch. Input selection switches for connecting
program inputs to the distribution system.
11.13.3
Loudspeaker System. Low power speakers will be used to provide
uniform sound distribution at a low volume levels. For maximum coverage,
corridor speakers will be spaced at a maximum of twice the ceiling height
apart. Speakers located in individual rooms will be provided with separate
volume controls. Paging speakers in designated areas such as a pediatrics
clinic will be provided with a volume control and bypass relay for override
during paging. Table 11-6 provides guidance for speaker functions to be
provided in each area.
11.13.4
System Configuration.
The system shall be configured in
accordance with the following.
11.13.4.1
All Call. An all zone paging capability, which shall have
priority over all other paging will be provided in every facility.
All-call
may be accessed via a microphone in the central communication room or via
telephone. The microphone access has priority over the telephone access.
11.13.4.2
Wide Area Zone. Each hospital will be zoned by functional areas -
nursing tower, outpatient clinics, energy plant, and ancillary areas. Wide
area paging will have priority over all local paging. Microphone access has
priority over the telephone access. These zones may be accessed via a
microphone in the central communication room or via telephone.
11.13.4.3
Local Zones. For each ancillary or administrative department or
outpatient clinic where patients are seen for diagnosis or treatment, such as
radiology or physical therapy, paging zones will be established for both
patient and staff areas. Local zones will be accessed the telephone system.
In ancillary areas which only provide support, such as central material
services, only a staff zone will exist. The microphone access for the areas
will be at the department secretary or NCOIC office. Local zone paging may be
overridden by wide area zone or all zone paging. A music volume control with
bypass relay for paging will be provided at the same location as the
microphone.
11.13.4.4
Music Only Speakers. Music only speakers will be provided at
locations where staff or patient paging is not required but music is desired.
A volume control will be provided in each music only area.
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