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Configuring Multiservice Audio Mode Port Parameters for CTP Bundles (CTP Menu)

 

Before you begin:

  • Disable the bundle before you modify the bundle options.

To configure Multiservice audio mode port parameters using the CTP Menu:

  1. From the CTP Main Menu, select 1) Bundle Operations.
  2. Select 1) CTP.
  3. Select a bundle from the list.

    If you select an active bundle, you are prompted to disable the bundle before configuring it.

  4. Select 3) Port Config.
  5. Select 2) Interface.
  6. Select 1) Type, and set the type to Optional Interface: MultiSvc.
  7. Follow the onscreen instructions and configure the options as described in Table 1.

Table 1: CTP Bundle Multiservice Audio Mode Port Parameter Settings in the CTP Menu

FieldFunctionYour Action

Mode

Specifies that the bundle will run in audio mode.

Select AUDIO.

Master/Slave

Specifies whether this end of the circuit provides clocking or uses adaptive clocking.

If the CTP devices at both ends of the circuit are synchronized, you can configure both ends as Master.

Select one:

  • Master—This end of the circuit provides clocking.

  • Slave—This end of the circuit uses adaptive clocking.

Dual Channel

Two channels are supported—channel 0 and channel 1.

Enables or disables the use of both channels.

Select one:

  • Disable—Channel 0 is the only active channel.

  • Enable—Both channel 0 and channel 1 are active.

Audio Sample Rate

Specifies the sample rate for audio circuits in kilohertz. The sample rate determines the audio quality and the network bandwidth needed. Higher sample rates create an IP data flow that requires higher bandwidth.

8 KHz corresponds to standard toll quality voice.

48 KHz corresponds to CD quality audio.

Select one:

  • 8

  • 12

  • 16

  • 24

  • 32

  • 48

μ-law Encoding:

Enables or disables μ-law encoding. Standard audio code samples are 16 bits. If you enable μ-law encoding, the 16-bit samples are converted to 8 bits, consuming half of the bandwidth without significant audio degradation.

Select one:

  • Disable—Generates 16-bit audio samples.

  • Enable—Generates 8-bit audio samples.

Talk Squelch

Enables or disables the active squelch function on the circuit.

If enabled, specifies whether the squelch is active or inactive.

The squelch function gates local audio output when DSR-A (channel 0) or RTS-A (channel 1) inputs are active or inactive.

Select one:

  • Disable—Disables the active squelch function on the circuit (audio output is always enabled).

  • Enable and active—Squelch input is grounded and analog output is disabled.

  • Enable and inactive—No signal is applied to the squelch input. Input is open and analog output is possible.

Ch 0 Output Level: 1.00x (decimal 128)

Specifies the output level for channel 0.

Note the following information about the values:

  • 0—There is no output.

  • 128—Unity gain, which means there is no attenuation or gain.

  • 255—Gain is 2:1.

Enter a number from 0 through 255.

Ch 1 Output Level: 1.00x (decimal 128)

Specifies the output level for channel 1.

Note the following information about the values:

  • 0—There is no output.

  • 128—Unity gain, which means there is no attenuation or gain.

  • 255—Gain is 2:1.

Enter a number from 0 through 255.