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This feature implements high-density voice support on the Cisco AS5300 by using DSPM-549 digital signal processor (DSP) modules. When equipped with Voice Feature Cards (VFCs) and voice-enabled Cisco IOS software, the AS5300/Voice Gateway supports carrier-class VoIP and FAX over IP services.
High-density voice support increases the voice capacity of a Cisco AS5300 up to 120 channels. This increase in voice support provides the voice density of up to four T1 lines (96 voice or FAX calls) or four E1 lines (120 voice or FAX calls).
A fully configured voice-capable Cisco AS5300 router includes two voice carrier cards, each capable of supporting 60 concurrent sessions.
The benefits of high-density voice features include:
The following restrictions apply to this release:
If you intend to use this feature in a network with existing VoIP, be sure to configure G729 pre-ietf on the outgoing and incoming VoIP dial peer.
Use the copy tftp: vfc: copy command with Cisco IOS Release Version12.0(2)XH or a later release. Use the copy tftp vfc copy command (no colons) with Cisco IOS Release Version 11.3(2)NA or a later release.
For related information on this feature, refer to the following documents:
Cisco AS5300
For descriptions of supported MIBs and how to use MIBs, see Cisco's MIB website on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
None
The following Cisco IOS Release images are required for 549 DSP modules:
Before you can configure your Cisco AS5300 to use VoIP, you must first complete the tasks listed below.
Perform the following tasks to configure high-density voice for the Cisco AS 5300:
The following steps identify the voice cards in the system and determine whether the VFC is in VCWare mode or ROM monitor mode. The mode determines how you download software to the VFC. If VCWare is not loaded on the VFC, you can use the ROM monitor mode to download the VCWare. Otherwise, the VCWare mode is active.
| Step | Command | Purpose | ||
|---|---|---|---|---|
| 5300> enable Password: <password> 5300# | Enter enable mode (also called Privileged EXEC mode). Enter the password. You have entered enable mode when the prompt changes to 5300#. | ||
| 5300# show vfc <0-2> board | Determine the number of voice cards in the system, the slot number for each card, and the VFC mode (VCWare or ROM monitor) in which you are running. The VFC mode is indicated as follows:
or
Note the location and the mode type for each voice card. You will need this information when you upgrade the VCWare. |
Go to one of the following sections to continue the procedure to upgrade the VCWare:
or
Use these steps to download new voice software if your voice card is running in VCWare mode. When downloading from a diskette, first copy the software from the diskette to a TFTP server.
 | Caution Erasing the VFC files can result in system outage or the corruption of your VFC board. Ensure that you have the correct software version on your TFTP server. |
| Step | Command | Purpose | ||
|---|---|---|---|---|
| 5300# erase vfc slot_number This will erase the contents of VFC Flash. Continue ?[y/n]: y This will take some time. Please, wait...vfc | See the Caution that precedes this table. Erase the contents of the VFC Flash memory in the selected voice card. You must erase the previous files to load a new image. If this command fails, go to "Replacing Firmware with VCWare in ROM Monitor Mode." | ||
| 5300# show vfc slot_number directory | (Optional) Verify that the VFC Flash memory is empty. | ||
| 5300# copy tftp: vfc:
Address or name of remote host []?
223.255.212.244
Source file name []? /path/filename
Destination file name []? filename
Accessing tftp://ipaddress/path/filename...
Loading filename from ipaddress (via Ethernet0):
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK -
size bytes]
or
5300# copy tftp vfc
Voice card slot number <slot ? 1>
Address or name of remote host [UNKNOWN]? ipaddress
Source file name? /path/filename
Destination file name [filename]? filename
! note, the destination filename is *IMPORTANT*
Accessing file 'filename' on
ipaddress...
Loading filename from ipaddress (via Ethernet0):
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK -
size bytes]
| Use the first copy command with Cisco IOS Release Version 12.0(2)XH or later releases, and use the second copy command (no colons) with Cisco IOS Release Version 11.3(2)N or later releases. Use TFTP to download the new VCWare to VFC Flash memory. In this example, slot 1 is the default. Note: Begin the destination image name with "vcw-" (all lowercase). Do not use any other character in front of vcw-; therefore, do not include a directory path at the beginning of the image name. Make sure that you enter the name correctly. If one character or space is wrong, the file is not recognized and is not copied. | ||
| 5300# show vfc slot_number directory 5300# | Verify that VCWare is in the VFC Flash memory by providing a list of files. | ||
| 5300# clear vfc slot_number 5300# | Reload the VFC code from Flash memory for the specified slot before you unbundle the new VFC image. | ||
| 5300# unbundle vfc slot_number Do you want to continue ? [y/n]: y | Unbundle the DSPWare from the VCWare and configure the default file and capability lists with default values. This rewrites the default-file and capabilities lists. (See Steps 8 and 9.)
Press y when the prompt appears. | ||
| 5300# show vfc slot_number directory 5300# | Verify that the DSPWare is unbundled by providing a list of files. | ||
| 5300# show vfc slot_number default-file 5300# | Verify that the default file list is initialized by providing a list of files. | ||
| 5300# show vfc slot_number cap-list 5300# | Verify that the capability list is populated by providing a list of files. | ||
| 5300# reload | Reboot the Cisco AS5300 so these changes take effect. |
Use these steps to download new voice software if your voice card is running in ROM monitor mode. When downloading from a diskette, first copy the software from the diskette to a TFTP server, then, follow these steps.
| Caution Erasing the VFC files can result in system outage or the corruption of your VFC board. Ensure that you have the correct software version on your TFTP server before continuing. |
| Step | Command | Purpose | ||
|---|---|---|---|---|
| 5300# clear vfc slot_number purge debug vfc <slot#> start debug vfc <slot#> cons flash erase This will erase the contents of VFC Flash. Continue ?[y/n]: y This will take some time. Please, wait...vfc | See the Caution that precedes this table. Erase the contents of the VFC Flash memory in the selected voice card. You must erase the previous files to load a new image. Press y to continue. | ||
| 5300# copy tftp: vfc:
Address or name of remote host []? ipaddress
Source file name []? /path/filename
Destination file name []? filename
Accessing tftp://ipaddress/path/
filename...
Loading filename from ipaddress
(via Ethernet0):
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK -
size bytes]
or
5300# copy tftp vfc
Voice card slot number <slot ? 1>
Address or name of remote host [UNKNOWN]? ipaddress
Source file name? /path/filename
Destination file name [filename]? filename
! note, the destination filename is *IMPORTANT*
Accessing file 'filename' on ipaddress
Loading filename from ipaddress (via Ethernet0):
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK -
size bytes]
| Use the first copy command with Cisco IOS Release Version 12.0(2)XH or later releases, and use the second copy command (no colons) with Cisco IOS Release Version 11.3(2)N or later releases. Use TFTP to download the new VCWare to VFC Flash memory. In this example, slot 1 is the default. Note: Begin the destination image name with "vcw-" (all lowercase). Do not use any other character in front of vcw-; therefore, do not include a directory path at the beginning of the image name. Make sure that you write the name correctly. If one character or space is wrong, the file is not recognized and is not copied. | ||
| 5300# show vfc slot_number technology 5300# | Report the type of DSPs supported (C542 or C549). | ||
| 5300# clear vfc slot_number 5300# Do you really want to reset this card ? [y/n] y Please, wait... | Reload the VFC code from Flash memory for the specified slot before you unbundle the new VFC image.
Press y to verify the reset function. | ||
| 5300# unbundle vfc slot_number Do you want to continue ? [y/n]: y | Unbundle the DSPWare from the VCWare and configure the default file and capability lists with default values. This rewrites the default-file and capabilities lists. (See Steps 7 and 8.)
Press y when the prompt appears. | ||
| 5300# show vfc slot_number directory 5300# | Verify that the DSPWare is unbundled by providing a list of files. | ||
| 5300# show vfc slot_number default-file 5300# | Verify that the default file list is initialized by providing a list of files. | ||
| 5300# show vfc slot_number cap-list 5300# | Verify that the capability list is populated by providing a list of files. | ||
| 5300# reload | Reboot the Cisco AS5300 so these changes take effect. |
To check that you have successfully downloaded the software:
Step 1 Enter the show vfc slot_number directory command to verify that the VCWare is in the Flash memory. Only one filename appears. If this command times out, start over with "Identifying Voice Cards."
5300# show vfc 1 dir
Files in slot 1 VFC flash:
File Name Size (Bytes)
1 . vcw-vfc-mz.c549.3.0.bin 466168
2 . btl-vfc-l.3.0.bin 4174
3 . btj-vfc-l.3.0.bin 3868
4 . jbc-vfc-l.3.0.bin 12756
5 . cor-vfc-hc-l.3.0.bin 47754
6 . bas-vfc-hc-l.3.0.bin 38634
7 . fax-vfc-hc-l.3.0.bin 80794
8 . cdc-g711-hc-l.3.0.bin 218
9 . cdc-g726-hc-l.3.0.bin 218
10. cdc-g729-hc-l.3.0.bin 31516
11. cdc-g728-hc-l.3.0.bin 24334
12. cdc-g723.1-hc-l.3.0.bin 47234
Step 2 Enter the show vfc slot_number default-file and show vfc slot_number cap-list commands to verify that the DSPWare is unbundled and the default file list and cap-list are initialized.
5300# show vfc 1 def (full word is default-file) Default File List for VFC in slot 1: 1. btl-vfc-l.3.0.bin 2. cor-vfc-hc-l.3.0.bin 3. bas-vfc-hc-l.3.0.bin 4. cdc-g729-hc-l.3.0.bin 5. fax-vfc-hc-l.3.0.bin 6. jbc-vfc-l.3.0.bin 7. btj-vfc-1.3.0.bin 5300# show vfc 1 cap-list Capability List for VFC in slot 1: 1. cor-vfc-hc-l.3.0.bin 2. bas-vfc-hc-l.3.0.bin 3. fax-vfc-hc-l.3.0.bin 4. cdc-g711-hc-1.3.0.bin 5. cdc-g726-hc-1.3.0.bin 6. cdc-g729-hc.1.3.0.bin 7. cdc-g728-hc-1.3.0.bin 8. cdc-g723.1-hc-1.3.0.bin 5300#
If you are having trouble downloading the voice card software in VCWare mode, see the following suggestions:
Step 1 Enter the show vfc slot_number board command to verify that the voice card is back up in VCWare mode.
5300# show vfc 1 board VFC board state is UP, vfc status VCWARE running(0x4) VFC board in slot 1 with 24 dsps 5300#
Step 2 Determine if the VFC ROM version you are running is version 1.1 or a later version.
5300# sh vfc 1 ver vcw
Voice Feature Card in Slot 1:
VCware Version : 3.0
ROM Monitor Version : 1.2
DSPware Version : 3.0
Technology : C549
Step 3 Type the reload command to reboot the Cisco AS5300 so these changes take effect.
This section provides the following configuration examples:
The following example downloads new voice software for a voice card running in VCWare mode:
5300# erase vfc 2 This will erase the contents of VFC Flash. Continue ?[y/n]:yes This will take some time. Please, wait...vfc 5300# show vfc 2 directory 5300# copy tftp: vfc: Address or name of remote host []? 223.255.212.244 Source file name []? /path/vcw-vfc-mz.c549.3.0.bin Destination file name []? vcw-vfc-mz.c549.3.0.bin Accessing tftp://223.255.212.244/path/ vcw-vfc-mz.c549.3.0.bin... Loading vcw-vfc-mz.c549.3.0.bin from 223.255.212.244 (via Ethernet0): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !![OK - 491256/982016 bytes] 5300# show vfc 2 directory 5300# clear vfc 2 5300# unbundle vfc 2 Do you want to continue ? [y/n]: y 5300# show vfc 2 directory 5300# show vfc 2 default-file 5300# show vfc 2 cap-list 5300# reload
The following example downloads new voice software for a voice card running in ROM monitor mode:
5300# clear vfc 1 purge debug vfc 1 start debug vfc 1 cons flash erase This will erase the contents of VFC Flash. Continue ?[y/n]: y This will take some time. Please, wait...vfc 5300# copy tftp: vfc: Voice card slot number 1 Address or name of remote host [UNKNOWN]? 223.255.212.244 Source file name? /path/vcw-vfc-mz.c549.3.0.bin Destination file name [vcw-vfc-mz.c549.3.0.bin]? vcw-vfc-mz.c549.3.0.bin ! note, the destination filename is *IMPORTANT* Accessing file 'vcw-vfc-mz.c549.3.0.bin' on 223.255.212.244... Loading vcw-vfc-mz.c549.3.0.bin from 223.255.212.244 (via Ethernet0): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![OK - 291292/291328 bytes] 5300# show vfc 1 technology 5300# clear vfc 1 Do you really want to reset this card ? [y/n] y Please, wait... 5300# unbundle vfc 1 Do you want to continue ? [y/n]: y 5300# show vfc 1 directory 5300# show vfc 1 default-file 5300# show vfc 1 cap-list 5300# reload
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command references.
In Cisco IOS Release 12.0(1)T or later releases, you can search and filter the output for show and more commands. This functionality is useful when you need to sort through large amounts of output, or if you want to exclude output that you do not need to see.
To use this functionality, enter a show or more command followed by the "pipe" character (|), one of the keywords begin, include, or exclude, and an expression that you want to search or filter on:
command | {begin | include | exclude} regular-expression
See the following example of the show atm vc command where you want the command output to begin with the first line where the expression "PeakRate" appears:
show atm vc | begin PeakRate
For more information on the search and filter functionality, see the Cisco IOS Release 12.0(1)T feature module CLI String Search.
To specify the voice coder rate of speech for a dial peer, use the codec dial-peer configuration command. Use the no form of this command to reset the default value.
codec [g711alaw | g711ulaw | g723ar53 | g723ar63 | g723r53 | g723r63 | g726r16 | g726r24 | g726r32 | g728 | g729br8 | g729r8 pre-ietf | g729r8] [bytes]
list of codecs | Specifies the type of CODEC used. |
bytes | Number of voice data bytes per frame. Valid sizes vary by CODEC. |
No default behavior or values.
Dial-peer configuration
| Release | Modification |
|---|---|
11.3(1)T | This command was introduced. |
11.3 NA | Expanded CODEC support. |
12.0(2)XH | Expanded CODEC support. |
If CODEC values for the VoIP peers of a connection do not match, the call will fail.
The following CODECs are not supported in this release: G.726 and G.728.
The following example configures a g723r63 CODEC with 24 bytes of voice payload.
5300(config-dial-peer)# codec g723r63 bytes 24
The following example configures a g729r8 CODEC with pre-IETF bit ordering to support 110 bytes of voice payload.
5300(config-dial-peer)# codec g729r8 pre-ietf bytes 110
| Command | Description |
Specifies how an H.323 gateway relays DTMF tones between telephony interfaces and an IP network. | |
Specifies the fax rate to get to the specified peer. | |
Specifies a list of supported codecs. |
To specify a list of preferred codecs to use on a dial peer, use the codec preferences class configuration command. Use the no form of this command to disable this feature.
codec preference value codec_type bytes size
value | Specifies the order of preference with 1 being the most preferred and 12 being the least preferred. |
codec_type | Specifies the type of CODEC preferred. |
bytes | (Optional) Specifies that the size of the voice frame is in bytes. |
size | Number of voice data bytes per frame. Valid sizes vary by CODEC. |
No default behavior or values.
Class configuration
| Release | Modification |
|---|---|
12.0(2)XH | This command was introduced. |
None
The following example illustrates a list of 12 CODECs in order of preference.
5300(#conf t Enter configuration commands, one per line. End with CNTL/Z. 5300(config)#voice class codec 99 5300(config-class)#codec preference 1 g711alaw 5300(config-class)#codec preference 2 g711ulaw bytes 80 5300(config-class)#codec preference 3 g723ar53 5300(config-class)#codec preference 4 g723ar63 bytes 144 5300(config-class)#codec preference 5 g723r53 5300(config-class)#codec preference 6 g723r63 bytes 120 5300(config-class)#codec preference 7 g726r16 5300(config-class)#codec preference 8 g726r24 5300(config-class)#codec preference 9 g726r32 bytes 80 5300(config-class)#codec preference 10 g728 5300(config-class)#codec preference 11 g729br8 5300(config-class)#codec preference 12 g729r8 bytes 50 5300(config-class)#end # 5300(config)#
| Command | Description |
Specifies the voice coder rate of speech for a dial peer. | |
Creates a preference list of codecs to use on a specific dial peer. | |
Creates a codec preference list that is dial peer independent or can be applied to several dial peers. |
To specify how an H.323 gateway relays DTMF tones between telephony interfaces and an IP network, use the dtmf-relay dial-peer configuration command. Use the no form of this command to remove all signaling options and transmit the DTMF tones as part of the audio stream.
dtmf-relay [cisco-rtp] [h245-alphanumeric] [h245-signal]
cisco-rtp | (Optional) Forwards DTMF tones by using RTP protocol with a Cisco proprietary payload type. |
h245-alphanumeric | (Optional) Forwards DTMF tones by using the H.245 "alphanumeric" User Input Indication method. Supports tones 0-9, *, #, and A-D. |
h245-signal | (Optional) Forwards DTMF tones by using the H.245 "signal" User Input Indication method. Supports tones 0-9, *, #, and A-D. |
Disabled
Dial-peer configuration
| Release | Modification |
|---|---|
12.0(2)XH | This command was introduced. |
The principal advantage of this feature is that it transmits DTMF tones with greater fidelity than is possible in band for most low-bandwidth CODECs, such as G.729 and G.723. Without the use of DTMF-relay, calls established with low-bandwidth CODECs may have trouble accessing automated DTMF-based systems, such as voicemail, menu-based ACD systems, and automated-banking systems.
The gateway only sends DTMF tones in the format you specify if the remote device supports it. If the remote device supports multiple formats, the gateway chooses the format based on the following priority:
The following example configures DTMF-relay with cisco-rtp when sending DTMF tones to dial-peer 103:
5300# conf t 5300(config)# dial-peer voice 103 voip 5300(config-dial-peer)# dtmf-relay cisco-rtp 5300(config-dial-peer)# end 5300#
The next example configures the gateway to send DTMF inband (the default) when sending DTMF tones to dial-peer 103:
5300# conf t 5300(config)# dial-peer voice 103 voip 5300(config-dial-peer)# no dtmf-relay 5300(config-dial-peer)# end
| Command | Description |
Specifies the voice coder rate of speech for a dial peer. |
To specify the fax rate to use with a peer, use the fax-rate dial-peer configuration command. Use the no form of this command to reset the default value.
fax-rate rate bytes
rate | (Optional) Forwards DTMF tones by using RTP protocol with a Cisco proprietary payload type. Valid rates are 2400, 4800, 7200, 9600, 12000, 14400, disable, and voice. |
bytes | (Optional) Forwards DTMF tones by using the H.245 "signal" User Input Indication method. Supports tones 0-9, *, #, and A-D. |
Voice
Dial-peer configuration
| Release | Modification |
|---|---|
11.3(1)T | This command was introduced. |
12.0(2)XH | The fax transmission rate of 12000 was added. |
Use the fax-rate command to specify the fax-transmission rate to the specified dial peer.
The values for this command apply only to the fax-transmission speed and do not affect the quality of the fax itself. The higher transmission rate values increase transmission speed but monopolize a significant amount of the available bandwidth. The slower transmission speeds use less bandwidth.
If the fax-rate command is set above the CODEC rate in the same dial peer, the data sent over the network for fax transmission is above the bandwidth reserved for RVSP. Because more network bandwidth is monopolized by the fax transmission, Cisco does not recommend setting the fax-rate value higher than the CODEC value. If the fax-rate value is set lower than the CODEC value, faxes will take longer to transmit, but use less bandwidth.
The following example sets the fax rate at 12000 bits per second and the size of the fax-data frame to 200 bytes:
5300(config-dial-peer)# fax-rate 12000 bytes 200
| Command | Description |
Specifies the voice coder rate of speech for a dial peer. |
To see the entries in the host-name-and-address cache, use the show vfc EXEC command.
show vfc slot-number [technology]
slot-number | VFC slot number. |
technology | Displays the technology type of the VFC. |
No default behavior or values.
EXEC
| Release | Modification |
|---|---|
10.0 | This command was introduced. |
12.0(2)XH | The technology keyword was added. |
The following example shows that the card in slot 1 is a C549 DSPM: 5300# show vfc 1 t Technology in VFC slot 1 is C549
| Command | Description |
Unbundles the DSPWare from the VCWare. |
To unbundle DSPWare from the VCWare and configure the default file and capability lists with default values, use the unbundle vfc EXEC command.
unbundle [high-complexity] vfc slot-number
high-complexity | (Optional) Unbundles the high-complexity firmware set. |
slot-number | VFC slot number. |
No default behavior or values.
EXEC
| Release | Modification |
|---|---|
12.0(3)T | This command was introduced. |
12.0(2)XH | The high-complexity and medium-complexity keywords were added. |
Before unbundling a VFC software image that you have just copied over to VFC flash, use the clear vfc x command. Unbundling a DSP firmware set rewrites the default-file and capabilities lists. After unbundling, you must reload the router for any changes to take effect.
The following example unbundles the high-complexity firmware set into slot 2:
5300# unbundle high-comp vfc 2
The following example unbundles the VFC firmware set into slot 1:
5300# unbundle vfc 1 You must do 'clear vfc 1' before unbundling a VFC software image that you have just copied over to VFC flash. You have requested unbundling of the default DSP firmware set which will re-write the default-file and capabilities lists. After unbundling, you must reload the Router for any changes to take effect. Do you want to continue ? [y/n]: n Unbundling not done. 5300#
| Command | Description |
Displays the technology type for the specified VFC. |
To create a CODEC preference list which is independent of a dial peer and can be used on multiple dial peers, use the voice class codec configuration command.
voice class codecThis command has no arguments or keywords.
No default behavior or values.
Configuration
| Release | Modification |
|---|---|
12.0(2)XH | This command was introduced. |
None
The following example creates preference list 99 which can be applied to any dial peer:
5300(#conf t Enter configuration commands, one per line. End with CNTL/Z. 5300(config)#voice class codec 99 5300(config-class)#codec preference 1 g711alaw 5300(config-class)#codec preference 2 g711ulaw bytes 80 5300(config-class)#codec preference 3 g723ar53 5300(config-class)#codec preference 4 g723ar63 bytes 144 5300(config-class)#codec preference 5 g723r53 5300(config-class)#codec preference 6 g723r63 bytes 120 5300(config-class)#codec preference 7 g726r16 5300(config-class)#codec preference 8 g726r24 5300(config-class)#codec preference 9 g726r32 bytes 80 5300(config-class)#codec preference 10 g728 5300(config-class)#codec preference 11 g729br8 5300(config-class)#codec preference 12 g729r8 bytes 50 5300(config-class)#end # 5300(config)#
| Command | Description |
Specifies a list of supported codecs. | |
Creates a preference list of codecs to use on a specific dial peer. |
To apply a CODEC preference list to a specific dial peer, use the voice-class codec dial-peer configuration command.
voice-class codecThis command has no arguments or keywords.
No default behavior or values.
Dial-peer configuration
| Release | Modification |
|---|---|
12.0(2)XH | This command was introduced. |
None
The following example applies preference list 99 to dial-peer 1919 and illustrates how you can verify this action by entering the sh ru command:
5300(#conf t Enter configuration commands, one per line. End with CNTL/Z. 5300(config)#voice class codec 99 5300(config-class)#codec preference 1 g711alaw 5300(config-class)#codec preference 2 g711ulaw bytes 80 5300(config-class)#codec preference 3 g723ar53 5300(config-class)#codec preference 4 g723ar63 bytes 144 5300(config-class)#codec preference 5 g723r53 5300(config-class)#codec preference 6 g723r63 bytes 120 5300(config-class)#codec preference 7 g726r16 5300(config-class)#codec preference 8 g726r24 5300(config-class)#codec preference 9 g726r32 bytes 80 5300(config-class)#codec preference 10 g728 5300(config-class)#codec preference 11 g729br8 5300(config-class)#codec preference 12 g729r8 bytes 50 5300(config-class)#end # 5300(config)# # (config)#dial-peer voice 1919 voip (config-dial-peer)#voice-class codec 99 (config-dial-peer)#end #sh ru dial-peer voice 1919 voip voice-class codec 99 ! voice class codec 99 codec preference 1 g711alaw codec preference 2 g711ulaw bytes 80 codec preference 3 g723ar53 codec preference 4 g723ar63 bytes 144 codec preference 5 g723r53 codec preference 6 g723r63 bytes 120 codec preference 7 g726r16 codec preference 8 g726r24 codec preference 9 g726r32 bytes 80 codec preference 10 g728 codec preference 11 g729br8 codec preference 12 g729r8 bytes 50
| Command | Description |
Specifies a list of supported codecs. | |
Creates a codec preference list that is dial peer independent or can be applied to several dial peers. |
AAA---Authentication, Authorization, and Accounting.
ANI---Answer Number Identification, calling party number.
CLI---Command Line Interface, IOS user command, and configuration system.
CO---Central Office.
D-channel---Signaling channel; pathway for out-of-band call control.
DMA---Direct Memory Access (used by VC to transfer data to the AS5300 motherboard).
DSP---Digital Signal Processor.
E.164 Address---In this context, the telephone number.
FGD---Feature Group D. Identifies a standardized service available to carriers delivered on a channelized T1 line.
Gateway---H.323 VoIP gateway is the point where a circuit-switched call is encoded and encapsulated into IP packets.
GateKeeper---In the context of this feature module, H.323 VoIP gatekeeper refers to the Cisco IOS-based gatekeeper, which runs on 2600 and 3600 platforms.
H.323 RAS---Registration, Admission, and Status. The RAS signaling function performs registration, admissions, bandwidth changes, status, and disengage procedures between the VoIP Gateway and Gatekeeper.
Hairpin Re-routing---also known as Hairpinning. Rerouting a call back to the PSTN at the originating VoIP gateway-usually because a VoIP route is unavailable or the PSTN is judged to be the most cost-effective alternative.
HSRP---Hot Standby Routing Protocol. Previously existing protocol for failover to standby gatekeeper/router in a redundant router configuration.
ISAC ---ISDN Subscriber Access Controller.
ISDN ---Integrated Services Digital Network.
ITU ---International Telecommunication Union (formerly CCITT).
IVR---Interactive Voice Response. The system plays a message to the calling party and can also collect information from (interact with) the calling party.
LEC ---Local Exchange Carrier.
On-net---In this context of this feature module, on-net calls are voice over IP calls on the IP Network.
Off-net---In this feature module, off-net calls are those that are circuit-switched calls, whether they are switched by the PSTN or a PBX.
PBX---Private Branch eXchange.
PRI ---ISDN Primary Rate Interface.
PSTN ---Public Switched Telephone Network.
Q.931---ITU-T recommendation for Digital Subscriber Signalling System No. 1 Network Layer.
SNMP---Simple Network Management Protocol.
TDM---Time Division Multiplexing.
VFC---Voice Feature Card.
VoIP---Voice over IP.
Posted: Mon Aug 2 22:27:27 PDT 1999
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