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This chapter describes commands used to configure the voice port parameters on a Cisco 3800 system and display their statistics. The majority of voice interface configuration parameters handle electrical configuration of the actual interface, tuning the quality of the voice you hear over the connection.
Voice traffic is switched rather than routed, so many voice parameters are unique to the switching environment, although they retain the functionality and features required by routing applications. Commands are listed in Table 4-1, Table 4-2, and Table 4-3 and are described in detail later in this chapter.
| Command | Description |
|---|---|
| accept-qos | Specify minimum quality-of-service of calls for the voice-peer |
| coder | Configure coder for voice compression |
| cptone | Configure call progress tones |
| dest-pat | Associate a dialed number with the current voice-peer |
| dial-peer | Create, delete, and configure dial-peer table entries |
| dial-prefix | Specify a dial prefix to use for outbound calls |
| dial-type | Configure dialing mode as pulse or dtmf on voice port |
| echo-cancel | Enable echo cancellation |
| em signal | Configure E&M tie line trunk signaling |
| fax-relay | Enable or disable the fax and set the fax transmission rate |
| gain | Configure input or output gain for a selected voice port |
| gen-noise | Enable automatic noise generation |
| group | Assign a dial-peer group's dialed number with a voice peer |
| number-expansion | Specify a speed dial number |
| port | Bind a voice port to the current voice-peer |
| pvc signaling | Configure PVC signaling for transparent or translated mode |
| request-qos | Request quality-of-service for calls to the voice-peer |
| shutdown | Take voice interface off line |
| svc | Specify SVC bandwidth negotiation and quality of service |
| timing | Configure timing requirements |
| vad | Configure voice activity detection on a line |
| Command | Description |
|---|---|
| show dial-peer | Display a summary of dial peers or a detail of a dial peer |
| show number-expansion | Display all speed dial codes and their contents |
| show voice call-volume | Display call volume for the specified trunk |
| show voice port | Display all voice configuration statistics and information |
| show voice qos | Display quality of service statistics for each call |
| Command | Description |
|---|---|
| clear voice-counters | Clear all voice statistics and error counters |
Figure 4-1 illustrates configuration modes and the voice commands.
Specifies the minimum quality-of-service of calls to be accepted by the current voice-peer. Enter this command from the dial peer configuration mode.
Europa(conf-dial-peer)# accept-qos { best-effort | controlled-load | controlled-delay | predicted-delay | guaranteed-delay }
| best-effort | Requires incoming calls to have a minimum of the highest quality of service. |
| controlled-load | Requires incoming calls to be accepted within a controlled load (is there a specified amount of time or bandwidth). |
| controlled-delay | Requires incoming calls be accepted after a controlled delay of the specified time. |
| predicted-delay | Requires incoming calls to be accepted after a predicted delay of the specified time. |
| guaranteed-delay | Sets the current voice-peer to respond after a guaranteed delay of the specified time. |
The following example specifies that a minimum quality of service for the currently selected voice peer will be best effort:
Europa(conf-dial-peer)# accept-qos best-effort
request-qos
show voice qos
Clears all voice statistics and error counters for a port.
Europa(conf-voice) #clear voice counters slot/port
| slot/port | Optional. With this parameter, only the voice-interface you specify is cleared. Otherwise, all are cleared. |
The first voice port (0) on the card installed in the third slot (2) has all its statistics and error counters reset to zero in this example:
Europa(conf-voice) #clear voice-port 2/0
All voice ports on all cards installed in the Cisco 3800 system have their statistics and error counters reset to zero in this example:
Europa(conf-voice) #clear voice-port
Configures the algorithm for voice compression.
Europa(conf-voice) #coder { adpcm32k | adpcm24k |adpcm16k | ldcelp16k | csacelp8k}
| adpcm32k | ITU G.726 standard, 32k rate |
| adpcm24k | ITU G.726 standard, 24k rate |
| adpcm16k | ITU G.726 standard, 16k rat. |
| ldcelp16k | ITU G.728 standard, 16k rate (default) |
| csacelp8k | ITU G.729 standard, 8k rate |
Each country has a standard set of ring cadences or call progress tones that indicate the state of the call, such as call ringing, line busy, all circuits busy, and so forth. This commands configures the call progress tones to use according to your area's local convention.
Europa(conf-voice)#cptone country
| country | Choose one of the parameters describing the type of tone used locally:
· northamerica · unitedkingdom · germany · france · japan · australia · brazil · china |
Associates a dialed number with the current voice-peer.
Europa(conf-dial-peer)#group tag destination-pattern number
| tag | The numeric identifier of the voice dial peer. |
| number | E.164 number or prefix. |
show dial-peer
To create and configure dial-peer table entries to bind E.164 numbers to voice interfaces:
Europa(conf)#dial-peer voice tag pots
To delete dial-peer table entries:
Europa(conf)#no dial-peer voice tag pots
| tag | A numeric identifier for this peer, unique to this node. |
accept-qos
dest pat
dial-prefix
group
number-expansion
port
request-qos
svc
svc dial-peer voice
Specifies a dial prefix that will be automatically dialed out on the interface terminating the voice call. Used for outbound calls coming from the interface associated with the current voice-peer.
Europa(conf-dial-peer)#dial-prefix dial-string
| dial-string | A string of digits with commas (,) indicating pauses, and plus signs (+) indicating substitutions in the destination path. |
Configures the dialing type of the selected voice interface. Your telephone may have both settings. Make sure the setting on your phone matches the setting here.
Europa(conf-voice)#dial-type { pulse | dtmf }
| pulse | Sets the dial-type to pulse. Dial digits are transmitted using a series of pulses. |
| dtmf | Sets the dial-type to dual tone multifrequency dialing, also known as touch tone. |
timing
Enables the integrated echo cancellation feature with optional nonlinear processing. Use the no form of this command to disable the echo canceller selected.
Europa(conf-voice)#echo-cancel non-linear Europa(conf-voice)#no echo-cancel
| non-linear | Specifies that you would like to enable the nonlinear echo canceller option. |
Configures E&M tie line signaling.
Europa(conf-voice)#em signal { wink-start | immediate | delay-dial }
| wink-start | Start on receiving wink. |
| immediate | Start immediately. |
| delay-dial | Delay before dialing. |
Enables and disables the fax relay on detecting a fax signal and sets the desired fax transmission rate. All choices are bit rates, except for voice, which means use the currently configured voice rate.
To enable the fax relay:
Europa(conf-voice)#fax-relay rate { voice | r2400 | r4800 | r7200 | r9600 | r14400}
To enable the fax relay at the default rate:
Europa(conf-voice)#no fax-relay
To disable the fax relay:
Europa(conf-voice)#fax-relay disable
| rate | Indicates that you will enable the fax relay at the rate you specify. |
| voice | Uses the currently configured voice rate. |
| r2400 | Uses 2,400 bps fax rate. |
| r4800 | Uses 4,800 bps fax rate. |
| r7200 | Uses 7,200 bps fax rate. |
| r9600 | Uses 9,600 bps fax rate. |
| r14400 | Uses 14,400 bps fax rate. |
| disable | Disables the fax relay. |
To enable the fax relay on a selected voice port at 9600 bps:
Europa(conf-voice)# fax-relay rate r9600
Configures the input or output gain of the selected voice interface.
Europa(conf-voice)# gain input gain-level Europa(conf-voice)# gain output gain-level
| gain-level | The level of input or output gain in decibels. The accepted range is from -6 to +14. |
The following example sets the V2 voice port's input gain to -6 dB. The voice and data card is installed in the first slot:
voice-port 0/1 gain input -6
The following example sets the V1 voice port's output gain to 11 dB. The voice and data card is installed in the first slot.
voice-port 0/0 gain output 11
Enables an automatically generated background noise during dead time, providing listeners with reassurance that the line has not been dropped. Use the no form of this command to disable automatic background noise generation.
To enable automatic background noise generation:
Europa(conf-voice)# gen-noise Europa(conf-voice)# no gen-noise
Associates a dialed number with the current voice-peer.
Europa(conf-dial-peer)# group tag destination-pattern number
| tag | The numeric identifier of the voice dial peer. |
| number | E.164 number or prefix. |
Sets a translation between an abbreviated number and a full E.164 (telephone) number. This feature is also referred to as speed dial. Use the no form of this command to delete a speed dial reference.
Europa (conf)#number-expansion dialed-number translation Europa (conf)#no number-expansion dialed-number translation
| dialed-number | A simple regular expression, which may contain the following:
· Digits, characters, and symbols: 0-9, #, *, A, B, C, or D. · "." represents any single digit as defined above. · * to indicate collecting digits until a timeout. For example, to indicate a 7 followed by 4 required digits and 0-3 optional digits, enter 7...[.]{0,3}. |
| translation | An E.164 number or prefix used to translate the dialed number. If this translation is a prefix, it will be prepended to all nonspecified digits in the dialed number pattern. |
If the number expansion entry is 7...[.]{0,3} +1408527, and the number dialed is 74321, the resulting translation would be +14085274321.
Binds a voice interface to the current voice-peer.
Europa(conf-dial-peer)#port slot/port
| slot/port | Defines the slot the port's card is installed in and the actual port number. |
Configures PVC signaling for translated or transparent mode. Translated mode is necessary for FXS-to-FXS connections and FXS-to-E&M connections.
Europa(conf-dial-peer)# pvc signaling{normal|translated}
| normal | Pass and receive bits with their normal settings, as if through a wire. |
| translated | Translate signaling bits between their native interface significance and E&M protocol. |
Requests a quality-of-service for calls to the current voice-peer.
Europa(conf-dial-peer)# request-qos { best-effort | controlled-load | controlled-delay | predicted-delay | guaranteed-delay }
| best-effort | Requires incoming calls to have a minimum of the highest quality of service. |
| controlled-load | Requires incoming calls to be accepted within a controlled load. |
| controlled-delay | Requires incoming calls be accepted after a controlled delay of the specified time. |
| predicted-delay | Requires incoming calls to be accepted after a predicted delay of the specified time. |
| guaranteed-delay | Sets the current voice-peer to respond after a guaranteed delay of the specified time. |
To request best-effort quality of service for the currently selected voice-peer's calls:
Europa(conf-dial-peer)# request-qos best-effort
accept-qos
show voice qos
Display a summary of all dial-peers or detailed information about the configuration of a specific dial- peer you identify with a tag.
Europa#show dial-peer voicetag
| tag | Optional. If present, only the one dial-peer specified is shown in detail. Otherwise, all are shown in summary. |
The following example shows the display resulting from a request to list a dial peer's associated destination patterns:
Europa#shdial-peer voiceC3800 Database Dial Plan Table: ATM Address 0800.3e01.0228-8.64.2, Destination Pattern 4000 ATM Address 0800.3e01.0228-8.64.1, Destination Pattern 2000 ATM Address 0800.3e01.02ad-8.64.1, Destination Pattern 1000 ATM Address 0800.3e01.02ad-8.64.2, Destination Pattern 3000 Europa#
dest pat
dial-peer
Display all dialed number strings and their translations.
Europa# show number-expansion
Display call volume for the trunk specified.
Europa# show voice call-volume trunk
Display all voice configuration information as well as statistics and other information.
Europa#show voice portslot/port
| slot/port | Optional. Indicates the specific voice interface you would like to display. If not, all are shown. |
Displays the status of the second voice port, V2, on the first card installed:
Europa# show voice port 0/1
Display quality of service statistics for each call.
Europa# show voice qos
Takes the voice interface off-line. During configuration or testing, a voice interface can be taken off-line. This will busy out the interface and prevent connections from being made. Use the no form of this command to bring voice interface back on-line.
Europa(conf-voice)#shutdownEuropa(conf-voice)#no shutdown
Allows switched virtual circuit calls. If a call is initiated at the voice port, the dial peer you specify with this command is used to negotiate bandwidth and quality of service. Use the no form of this command to disable switched virtual circuit calls.
Europa(conf-voice)# svc dial-peer voice tag Europa(conf-voice)# no svc dial-peer voice
| tag | The numeric identifier of the voice dial peer. |
Configures timing requirements. The Cisco 3800 can connect to a variety of products with different timing requirements for detecting digits, pulses, and winks.
Europa(conf-voice)# timing { digit | inter-digit | pulse | pulse-inter-digit | clear-wait | wink-wait | wink-duration | delay-start | delay-duration } amount_of_time
| digit | DTMF digit duration in milliseconds (50-500, default 100). |
| inter-digit | DTMF interdigit duration in milliseconds (50-500, default 100). |
| pulse | Pulse dialing rate in pulses per second (pps) (10-20, default 20). |
| pulse-inter-digit | Pulse dialing interdigit timing in microseconds (100-1000, default 500). |
| clear-wait | Time of Inactive seizure signal to declare a call cleared (100-2000, default 500). |
| wink-wait | Maximum wink wait duration for wink start signaling (100-5000, default 50). |
| wink-duration | Maximum wink duration for wink start signaling (100-400, default 50). |
| delay-start | Timing of the generation of the delay start signal from detection of incoming seizure (20-200, default 50). |
| delay-duration | Maximum delay signal duration for delay dial signaling (100-5000, default 50). |
| amount_of_time | Enter the actual value within the acceptable range of the timing selection you have made. If you do not enter a value, the default indicated will be used. |
The following command sets the maximum wink wait duration for wink-wait signaling to 30 milliseconds.
Europa(conf-voice)# timing wink-wait 30
Enables voice activity detection. With VAD enabled, data cannot be transmitted when no sound is detected. Use the no form of this command to disable VAD.
To enable VAD:
Europa(conf-voice)#vadEuropa(conf-voice)#no vad
gen-noise
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