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Channel Label rename the channel by entering a name in the Label entry field (optional). labels are shown throughout Console wherever the channel is referenced. Channel Configuration Buttons the Channel Configuration Buttons enable you to configure settings for the telco rx channel. With the exception 108 of the mute, Cleareffect, and alC buttons, which toggle their respective functions and have no user-configurable settings, clicking a channel configuration button displays the Channel property Configuration window as shown below. the window contains three tabs: NC (Noise Cancellation), Telco Settings, and Telco meters, which are described in the following sections. NC (Noise Cancellation) Tab select the Enable Noise Canceller checkbox to enable nC for the channel. adjust the Cancellation depth slider to the dB setting which provides the best combination of low noise and maximum speech clarity. the attenuation depth can be set in 1dB increments from 6dB to 15dB. the default is 6dB. the default for nC is off. you can use noise cancellation on all types of input channels. see NC (Noise Cancellation) for more information. 109 Telco Settings Tab settings available on the Telco Settings Tab include: Auto Answer: set the number of rings before the unit connects an incoming call (or disable the function). the default is Disabled. Auto-disconnect: select the auto disconnect mode to control when the unit disconnects a connected call. modes include Loop drop + Call Progress, Call Progress, and Loop drop, and Off. the default is loop Drop + Call progress. Ring Type: select from three different ring tones (Type 1, Type 2, Type 3). to test a particular tone, click Test after you have selected the tone. Telco Adaptation: some applications require the unit to adapt to line conditions using a white-noise burst (Noise) rather than automatically (auto). the default is Auto. Hook Flash: sends a momentary interruption in the line seizure, allowing activation of options such as 3-way calling, call waiting, and call hold. this feature is dependent on the services offered by your telephone company. you can set the duration of the hook flash using the slider or the selector box. range is 50ms to 2 seconds in 10ms steps. the default is 250ms. dTmF Level: this feature allows you to adjust the DtmF tone level in relationship to the participant audio level in the room. the level can be adjusted in 1dB steps from a nominal level of 0dB to plus or minus 12dB in 1dB increments. the default is 0dB. Audible Ring Indication: When this feature is enabled, an audible ring is heard for incoming calls. the level adjustment allows you to customize the level in relationship to the participant audio level in the room. the level can be adjusted in 1dB steps from a nominal level 0 (default) to plus or minus 12dB in 1dB increments. the default is 0dB. Audible Hook Indication: When the unit goes off hook (connects) a beep is injected into the receive channel and transmit channel of the unit. When the unit goes on hook (disconnects), a series of two beeps is injected into the receive channel to indicate that the call has been dropped. this indicator can be turned on or off using the Audible Hook Indication check box. the default is on. the level adjustment allows you to customize the level in relationship to the participant audio level in the room. the level can be adjusted using the slider or selector box from nominal level 0 to plus or minus 12dB in 1dB steps. the default is 0dB. Ringer Cadence: • standard: uses the cadence specified in the Country Code to detect the standard ring cadence per country. 110 • Custom: set for distinctive ring cadences. When custom is set, the min On and min Off times must be selected from their respective drop-down boxes. pBx’s can have distinctive ring cadences that are not country specific. these times are the minimum values the ring cadence must be for the unit to detect the ring. If the ring cadence signal provided by the pBx is greater than the custom settings, the unit will detect the ring. Telco Meters Tab the telco meters tab displays a round-trip signal flow diagram for the selected telco rx, as well as real-time level meters for the signal at each stage of processing. the settings on this tab cannot be modified. NOTE: When you click the Close button (bottom right corner of screen), or close the window manually, any changes you make in the tabs of the Channel Property Configuration: Telco Rx screen are automatically saved. the telco meters include: • Telephone Echo Return Loss (TERL): this meter shows the amount of echo loss from the telephone line to the unit. • Telephone Echo Return Loss Enhancement (TERLE): this meter shows the enhancement added by the telephone hybrid to reduce echo below the audible level. • Total Telephone Echo Reduction (TTER): this meter shows the sum of terl and terle. • Transmit Input: this meter shows the audio level input from the matrix to the telephone line. • Transmit Output: thi...

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