Polycom EF2241 Connecting Unbalanced RCA to Balanced Mini Phoenix, Making AN EF BUS Terminator

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CONNECTOR PINOUTS

CONNECTING UNBALANCED RCA TO BALANCED MINI PHOENIX

RCA Male	Mini (3.5 mm) Phoenix
Tip

Red	Red	+
	Black	-
Black	Shield

1

2

3

Ring

Figure 31. Cable construction for connecting unbalanced RCA to balanced mini Phoenix (3 conductor terminal block).

1.Connect RCA Tip to Phoenix pin 1.

2.Connect RCA Ring to Phoenix pin 2.

3.Connect Phoenix pin 3 to Shield, and leave Shield floating on RCA end.

Caution! Do NOT connect the shield at both ends.

Caution! On the EF2241, Phoenix pin 3 is connected to chassis ground. Under no circumstances should Phoenix pin 3 be connected to pin 1 or to pin 2. Doing so will add noise to the audio signal.

MAKING AN EF BUS TERMINATOR

1 2 3 4 5 6 7 8

110Ω

Figure 32. The terminator

Instructions	To make a terminator (for use when connecting EF2280s), use an RJ45 connector.
	Connect pin 3 to pin 6 with an 110 Ohm resistor. A terminator is not required for the
	EF2241 as it is built in.

© Polycom, Inc.

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VORTEX EF2241 Reference Manual

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Contents Vortex EF2241 Reference Manual Page Introduction Introduction Welcome How to Use This ManualProduct Features Product RegistrationProduct Inputs Outputs Remote Control Tools Needed for Installation PRE-INSTALLATIONWhat’s Included What’s Not IncludedEF2241 Front and Rear Panels PRE-INSTALLATION Connecting the EF2241 to Other Equipment InstallationMounting the EF2241 North American RequirementCodec Typical EF2241 ConnectionsDevice IDS on the EF BUS Connecting Multiple Vortex DevicesTerminating the EF2241 Factory Default Settings PresetOff Presets Multiple Vortex Devices Pick a Standard Signal LevelCheck Surrounding Equipment Configure Program Audio Sources Input Settings Integrating the EF2241 Into Your SystemCalibration Set Levels on Line Input Channels Build Your Echo Canceller Reference SET UP the Phone InterfaceEcho Canceller Reference for Multiple Vortex Devices Customize Setting for Your Particular ApplicationBus Reference Setting upAutomixer Parameters Configure the Automatic Microphone MixerGlobal Settings Channel Settings Automixer Settings for Multiple Vortex DevicesConfigure the Matrix Mixer Default SettingsBuilding Your System with Multiple Vortex Devices Assign Inputs Assign Outputs Configure the submatrixEF BUS Presets Other EF2241 FeaturesConfigure Your Echo Canceller Reference LCD Menu Tree LCD Menu StructureLCD Menu Structure System System MenuPhone Control Phone ControlInputs 1-4, T, A-D InputsAutomixer Menu OutputsGlobal Settings Mixer Settings Matrix Matrix MenuInput/Output EQ Channel Band Parametric EQ MenuMacros PresetsAutomatic Microphone Mixer TroubleshootingNo microphones are gating Some microphones are not gating Too many microphones are gatingMatrix Mixer Echo Canceller ReferenceResidual Echo Room Audio Sounds ChoppyFinding the Source of Echo Room Gain Room Gain Excessive Room GainIn-Conference Quick Check Excessive Microphone Amplification Nonlinearity InsufficientEmail vortex@polycom.com Contacting Technical SupportTechnical Specifications Compliance USA and CanadaUS Telco requirements Canadian Telco Requirements Automatic Dialing Telco ConnectorRest of World AustraliaThis page was intentionally left blank CE Mark R& TTE Directive Vortex EF2241 Reference Manual Technical Support Noise and Reverberation Consider Room Gain Conference System DesignEN Echo Canceller, Noise Canceller EF2241 Block DiagramEF Bus Connector PinoutsInput/Output Remote Control Port Connecting Unbalanced RCA to Balanced Mini Phoenix Making AN EF BUS TerminatorInstructions Additional Notes RMA# Must be on package Warranty InformationState Law Rights What this warranty does not coverDefinition of Terms Echo CancellerAcoustic Echo Crosspoint Mix Minus BusNOM NOM Attenuation NOM Bus Presets Room GainDefinition of Terms Index NOM Index Page 1725-80098-001-C