Pub. 42004-442D
Models 10959-903 and 10959-904 Wall-Mount Audio Messenger Interface
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Acoustical feedback, or
howling
, can be a problem when broadcasting from a telephone. This occurs
when the telephone microphone is too close to a speaker that is broadcasting the audio created by the
microphone. The AMI includes an integral feedback eliminator circuit to prevent feedback. Incoming
telephone broadcasts are recorded and stored in the AMI until the telephone connection is terminated
(caller hangs up) when the AMI is configured to use the feedback eliminator. The AMI plays the saved
broadcast after termination of the call. The delay between the actual speech and the recording playback
eliminates the possibility of feedback.
The telephone interface has multiple operational modes that are configured with the AMI Configuration
Tool software application. The operational modes are as follows:
Model 10959-903
Record Page—Records a message and delivers it to the audio line output.
Live Page Mode—Delivers a live voice message (not pre-recorded) to the audio line output.
Manual/Disabled—Do not use.
Model 10959-904
Page/Party
®
—Delivers a live voice page (not pre-recorded) to the page line output. The party line is
held open following the page.
Record Page—Records a page, and delivers it to the page line output.
Mixed Mode—Records a page, delivers it to the page line output, and holds the party line open
following the page.
Live Page Mode—Delivers a live voice page (not pre-recorded) to the page line output. The party
line is not open following the page.
Ring Mode—Does not deliver a page, but instead plays a configured message on the page line to
signal the incoming call.
Manual/Disabled—The telephone interface does not automatically answer the telephone. An input
can be configured for
Manual Access
to allow an attendant to manually answer the phone and transfer
calls to a party line.
Radio Operation
The AMI can be used to access a mobile or base radio for wireless broadcasting. Connect the AMI’s
audio output and control output terminals to the transmit audio and PTT inputs of the radio’s accessory
connector to enable broadcast of live speech and alarm tones/messages over RF (Radio Frequency)
airwaves from the Model ACC2500 desk set.
N
OTE
:
Radio audio levels can vary greatly between manufacturers. The AMI’s audio level output is
1 V
RMS
. Please contact our Service Department at 1-800-492-1212, prompt no. 2, if this level
overdrives the radio input, as an attenuation circuit may be required.
Page/Party
®
Operation (Model 10959-904 Only)
The Model 10959-904 AMI is equipped with a PPI (Page/Party
®
Interface) PCBA that plays
messages/alarms and connects telephone calls to a Page/Party
®
system. It can generate the VLC (Volume
Level Control) tone during message/alarm broadcasts that give VLC-equipped Page/Party
®
stations a
signal to change the volume of the message/alarm being played.
