Cisco
Configuration Tasks
| Command | Purpose |
Step 2 |
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Specifies the amount of attenuation in decibels at | ||
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| the transmit side of the interface, decreasing the |
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| signal. A |
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| implemented using the input gain and output |
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| attenuation commands. |
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| The default value for this command assumes that a |
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| standard transmission loss plan is in effect, |
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| meaning that normally there must be |
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| attenuation between phones. |
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| The value argument is any integer from |
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| The default is 0. |
Step 3 |
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Specifies the terminating impedance of a voice | ||
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| port interface, which needs to match the |
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| specifications from the specific telephony system |
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| to which it is connected. |
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| • |
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| • |
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| The default is 600r. |
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Verifying Analog Voice-Port Configurations
After configuring the voice ports on your router, perform the following steps to verify proper operation:
Step 1 Pick up the handset of an attached telephony device and check for a dial tone.
Step 2 If you have dial tone, check for DTMF detection. If the dial tone stops when you dial a digit, then the voice port is most likely configured properly.
Step 3 To identify port numbers of voice interfaces installed in your router, use the show voice port summary command. For examples of the output, see the “Analog FXS Voice Port Example” section on page 30.
Step 4 To verify
Table 3 Show Analog Voice Port Command Syntax
Platform | Command Syntax |
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Cisco 2600 series | show voice port |
Cisco 3640 |
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Cisco 3660 |
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Step 5 To display
command.
Router# show voice dsp
Cisco IOS Release 12.2(2)XT and 12.2(8)T
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