Aiphone AI-900 AI-MS900 Master Station Connection and Adjustment, External speaker connection

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12.4. AI-MS900 Master Station Connection and Adjustment

12.4.1. External speaker connection

Follow the procedures below when connecting an external speaker (8Ω).

Step 1. Remove the AI-MS900's rear terminal cover and set the internal slide switch to the [EXT. SP] position.

Internal/External speaker selection switch

Terminal cover

EXT.SP terminal

Microphone sensitivity control

Internal speaker volume control

Step 2. Connect the speaker cable to EXT.SP terminal.

Speaker cable

Step 3. Replace the removed terminal cover in place.

12.4.2. Internal speaker volume and microphone sensitivity adjustment

The AI-MS900's internal speaker volume and microphone sensitivity can be adjusted by means of their respective controls located under the terminal cover described above. Both controls are factory-preset to their maximum positions.

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Contents Installation Manual Voice Security SystemTable of Contents Speech and Function Tests When mounted on a wall Safety PrecautionsSafety Symbol and Message Conventions When the Unit is in Use Applicable to the exchangeApplicable to the exchange FCC Requirements Industry Canada Requirements General Description FeaturesInstallation Precautions System Configuration and Equipment Functions System ConfigurationEquipment Functions AI-900MF Main Frame Nomenclature and Functions Installation and Connection Procedures Rack mounting Equipment InstallationAI-900MF Main Frame 55.2 AI-PU200 Power Transformer Unit Wall mounting Dimensional diagram AI-RS150, AI-RS160, AI-RS170 and AI-RS180 SubstationsMaster Station Desk-top mountingBattery replacement AI-900MF Card InstallationBackup Battery Installation Card Installation Wiring Wiring from the Station or Outside LineSupplied Connector Connection View a Station Address SettingAI-900MS Master Station Interface Card Connection Master Station and AI-900MS connectionConnection AI-900MS and AI-MS900 connectionExternal recording device and AI-900MS connection CN3 CN4AI-MS900 Master Station Connection and Adjustment External speaker connectionAI-900AL Telephone Interface Card Connection Telephone and AI-900AL connectionSetting telephones talking volume levels Setting of telephone volume switches on the AI-900AL cardExternal recording device and AI-900AL connection AI-900RS Substation Interface Card Connection Substation and AI-900RS connectionExternal amplifier and AI-900RS connection AI-900CO Outside Line Interface Card Connection Outside line and AI-900CO connectionExternal recording device and AI-900CO connection External amplifier and AI-900AF connection AI-900AF Audio Function Card ConnectionAmplifier and AI-900AF connection External sound source and AI-900AF connection External sound sources and AI-900AF connectionTermination resistance setting AI-900TI Tie-Line Interface Card Exchange InterconnectionExchange interconnection by means of AI-900TI Exchange Number Setting Exchange No. settingAI-900MF and power supply connection Direct connection by means of RS-232C Main Frame and PC ConnectionProgramming PC Connection Direct connection by means of RS-232C Programming PCConnection via modem Connection via modem Programming PCOperation Log PC Connection Direct connection by means of RS-232C Operation log PCSystem Programming Connection via modem Operation log PCFunction Test Speech and Function TestsSpeech Test Calls from the substationAI-900MS Master Station Interface Card SpecificationsAccessories AI-900AL Telephone Interface Card AI-900RS Substation Interface CardAI-900CO Outside Line Interface Card AI-900AF Audio Function CardAI-900TI Tie-Line Interface Card AI-YC303 Main Frame Wall Mounting Bracket