ATTO Technology 463-248-202 manual 10Installing the Hardware

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NOTE: Ground start interface requires common ground between paging input and telephone system by direct line or other common grounding methods.

The Dry Loop 600 Ohm is a four wire interface consisting of a dry audio pair with a 600 ohm impedance and a control pair. The page input is activated when the control pair receives a contact closure from the host equipment, connecting C1 to ground. The Dry Loop page input can also be activated by the presence of page input audio signals that exceed a set threshold. This threshold is set by the page VOX adjustment; clockwise rotation lowers the threshold and makes it more sensitive. Adjust by experimentation to account for various line loss and noise. This feature is beneficial for (amplified) microphone sources that don’t have a Music/Page control contact, or for remote AmpliCenters connected by leased pairs so that another pair is not required for Music/Page switching control.

Dry Loop Hi Impedance is used to interface with parallel multiple inputs. Input impedance is 100K ohms. Otherwise, the same as the 600 ohm dry loop operation.

The Ground Start mode is a two wire interface and has a 600 ohm input impedance. When a trunk is accessed, a momentary ground is sent to the ring-side of the pair by the host equipment, loop current is detected and the tip-side pair is closed. Disconnect supervision of the ground start mode is accomplished by monitoring the loop current.

The Loop Start mode is two wire interface and has a 600 ohm input impedance. The host equipment draws loop current from the talk-battery which is supplied by the AmpliCenter. Disconnect supervision of the loop start mode is accomplished by monitoring the loop current.

3-10Installing the Hardware

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Contents PagePac Plus AmpliCenter Trademarks Overview N t e n t sInstalling the Hardware B l es Controls and Indicators, Terminals and ConnectorsFigures Overview ContentsAbout This Guide How to Use This GuideBefore You Start Installation Steps Installation StepsPagePac Plus Connectivity Chart Connectivity ChartLoop 600 Ω PagePac Plus Connectivity Chart ContinuationReference Materials Product Safety LabelsHow to Comment on This Guide TerminologyShipping Container Contents Ordering Information PagePac Plus AmpliCenter Features and CapabilitiesAmpliCenter Specifications SpecificationsHardware Configuration Circuit Protection PowerMounting Universal Approvals Controls and Indicators, Terminals and ConnectorsControls and Indicators, Terminals and Connectors Auxiliary Equipment Installing the Hardware Additional Safety Instructions for Installation Personnel Important Safety InformationAmpliCenter without Controller, with Series AmpliCenters Example System Setup Amplicenter Interface with ControllerController Series AmpliCenters, without Controller Tools Required Mounting PagePac Plus AmpliCenterFront Detail Speaker Run Method Connecting SpeakersTelephone System Interface Telephone Mode Switch10Installing the Hardware Connection to AmpliCenter Music Input Connections Music Source InterfaceApply AC Power System TestingAudio Paging Zones Dtmf digit Maintenance and Customer Support Case of Difficulty Common Problems Power Failure OperationTroubleshooting Answer TroubleshootingAmpliCenter Electrical Block Digram Electrical Block DiagramFCC Statement Part Radio Frequency Interference FCC Statement and Warranty Information2FCC Statement and Warranty Information Installation and Maintenance Information Feedback Form How are we doing? FCC D exRack mounted hardware Diagram AT&T