Packetization Periods for Transcoding (ms) | |
---|---|
G.711 a-law, G.711 u-law, G.722-64 | 10, 20, or 30 |
G.729, G.729A, G.729B, G.729AB | 10, 20, 30, 40, 50, or 60 |
iLBC | 20 or 30 |
NM-HD-1V/2V (1 DSP) | NM-HDV2 (16 DSPs) | 2821/2851 (3 PVDM2-64) | ||||
---|---|---|---|---|---|---|
Conferencing | ||||||
G.711 | 8 sessions (64 conferees) | 24 sessions (192 conferees) | 50 sessions (400 conferees) | 50 sessions (400 conferees) | 50 sessions (400 conferees) | 50 sessions (400 conferees) |
G.722-64 | 2 sessions (16 conferees) | 6 sessions (48 conferees) | 32 sessions (256 conferees) | 16 sessions (128 conferees) | 24 sessions (192 conferees) | 32 sessions (256 conferees) |
G.729 | 2 sessions (16 conferees) | 6 sessions (48 conferees) | 32 sessions (256 conferees) | 16 sessions (128 conferees) | 24 sessions (192 conferees) | 32 sessions (256 conferees) |
iLBC | 1 session (8 conferees) | 3 sessions (24 conferees) | 16 sessions (128 conferees) | 8 sessions (64 conferees) | 12 sessions (96 conferees) | 16 sessions (128 conferees) |
G.711 a-law/u-law <-> G.729a/G.729ab/ GSM FR | 8 sessions | 24 sessions | 128 sessions | 64 sessions | 96 sessions | 128 sessions |
G.711 a-law/u-law <-> G.729/G.729b/ GSM EFR | 6 sessions | 18 sessions | 96 sessions | 48 sessions | 72 sessions | 96 sessions |
G.722-64 <-> G.711 | 8 sessions | 24 sessions | 128 sessions | 64 sessions | 96 sessions | 128 sessions |
G.722-64<-> any | 4 sessions | 12 sessions | 64 sessions | 32 sessions | 48 sessopms | 64 sessions |
iLBC <-> G.711 | 6 sessions | 18 sessions | 96 sessions | 48 sessions | 72 sessions | 96 sessions |
iLBC <-> any | 3 sessions | 9 sessions | 48 sessions | 24 sessions | 36 sessions | 48 sessions |
Voice Termination | ||||||
G.711 a-law/u-law | 16 sessions | 48 sessions | 256 sessions | 128 sessions | 192 sessions | 256 sessions |
G.722-64, G.726, G.729a, G.729ab, iLBC | 8 sessions | 24 sessions | 128 sessions | 64 sessions | 96 sessions | 128 sessions |
G.729, G.729b, G.723.1, G.728 | 6 sessions | 18 sessions | 96 sessions | 48 sessions | 72 sessions | 96 sessions |
G.711 a-law/u-law | G729 a/ab | iLBC | |||
---|---|---|---|---|---|
8 sessions (8 x 8 = 64 conferees) | 2 sessions (8 x 2 = 16 conferees) | 2 sessions (8 x 2 = 16 conferees) | 2 sessions (8 x 2 = 16 conferees) | 1 session (1 x 8 = 8 conferees) | |
Conferencing on PVDM2-8 | 4 sessions (4 x 8 = 32 conferees) | 1 session (1 x 8 = 8 conferees) | 1 session (1 x 8 = 8 conferees) | 1 session (1 x 8 = 8 conferees) | 1 session (1 x 8 = 8 conferees) |
16 sessions | — | — | — | — | |
Transcoding | 8 sessions | 8 sessions | 8 sessions | 6 sessions | 8 sessions |
Document Title | |
---|---|
Conferencing and transcoding for voice gateways | Cisco Communications Manager and Cisco IOS Interoperability Guide |
Transcoding for Cisco Unified Communications Manager Express | Cisco Unified Communications Manager Express System Administrator Guide |
Transcoding for Cisco Unified Border Elements | |
Dial-peer configuration | Dial Peer Configuration on Voice Gateway Routers |
Title | |
---|---|
H245, Annex S | Control protocol for multimedia communication |
MIBs Link | |
---|---|
•CISCO-VOICE-COMMON-DIAL-CONTROL-MIB.my •CISCO-VOICE-DIAL-CONTROL-MIB.my | To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
Title | |
---|---|
RFC3951 | Internet Low Bit Rate Codec (iLBC) |
RFC3952 | Real-time Transport Protocol (RTP) Payload Format for internet Low Bit Rate Codec (iLBC) Speech |
Link |
---|
The Cisco Technical Support & Documentation website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content. |
codec | Codec options available for the various platforms are described in Table 3, below. |
bytes | (Optional) Specifies the number of bytes in the voice payload of each frame. |
payload-size | (Optional) Number of bytes in the voice payload of each frame. See Table 4 for valid entries and default values. |
transparent | Enables codec capabilities to be passed transparently between endpoints in a Cisco Unified Border Element. Note The transparent keyword is only available on the Cisco 2600 and 3600 Series Router and Cisco 7200 and 7500 Series Router platforms. |
Cisco 1750 and Cisco 1751 Modular Access Routers | Cisco 2600 and 3600 Series Routers and Cisco 7200 and 7500 Series Routers | Cisco MC3810 Multiservice Concentrators | ||
---|---|---|---|---|
clear-channel--Clear channel at 64,000 bits per second (bps) | Yes | Yes | — | Yes |
g711alaw--G.711 A-Law at 64,000 bps | Yes | Yes | Yes | Yes |
g711ulaw--G.711 u-Law at 64,000 bps | Yes | Yes | Yes | Yes |
g722-64--G.722-64 at 64,000 bps | Yes | Yes | Yes | — |
g723ar53--G.723.1 Annex A at 5300 bps | — | Yes | Yes | Yes |
g723ar63--G.723.1 Annex A at 6300 bps | — | Yes | Yes | Yes |
g723r53--G.723.1 at 5300 bps | — | Yes | Yes | Yes |
g723r63--G.723.1 at 6300 bps | — | Yes | Yes | Yes |
g726r16--G.726 at 16,000 bps | Yes | Yes | Yes | Yes |
g726r24--G.726 at 24,000 bps | Yes | Yes | Yes | Yes |
g726r32--G.726 at 32,000 bps | Yes | Yes | Yes | Yes |
g726r53--G.726 at 53,000 bps | Yes | Yes | Yes | — |
g726r63--G.726 at 63,000 bps | Yes | Yes | Yes | — |
g728--G.728 at 16,000 bps | — | Yes | Yes | Yes |
g729abr8--G.729 Annex A and B at 8000 bps | Yes | Yes | Yes | Yes |
g729ar8--G729 Annex A at 8000 bps | Yes | Yes | Yes | Yes |
g729br8--G.729 Annex B at 8000 bps | Yes | Yes | Yes | Yes |
g729r8--G.729 at 8000 bps. This is the default codec | Yes | Yes | Yes | Yes |
Modification | |
---|---|
11.3(1)T | This command was introduced on the Cisco 3600 series. |
11.3(3)T | This command was implemented on the Cisco 2600 series. |
12.0(3)T | This command was implemented on the Cisco AS5300. This release does not support the clear-channel keyword. |
12.0(4)T | This command was implemented on the Cisco 3600 series, Cisco 7200 series and the Cisco MC3810. This release modified the command for VoFR dial peers. |
12.0(5)XE | Additional codec choices and other options were implemented. |
12.0(5)XK | The g729br8 and pre-ietfcodec choices were added for the Cisco 2600 and Cisco 3600 series. |
12.0(7)T | This command was integrated into Cisco IOS Release 12.0.(7)T and implemented on the Cisco AS5800. Additional voice coder rates of speech were added. This release does not support the clear-channel keyword on this platform. |
12.0(7)XK | The g729abr8 and g729ar8codec choices were for the Cisco MC3810, and the keyword pre-ietf was deleted. |
12.1(1)T | This command was integrated in Cisco IOS Release 12.1(1)T. |
12.1(5)T | The gsmefr and gsmfr codec keywords were added. |
12.2(8)T | The command was implemented on Cisco 1750 and Cisco 1751. |
12.2(13)T3 | The transparent keyword was added. This keyword is available only in js2 images. |
12.4(4)T | The gsmefr and gsmfr codec keywords were removed. |
12.4(15)XY | The g722-64 keyword was added. |
Protocol | Default Voice Payload (in Bytes) | ||
---|---|---|---|
g711alaw g711ulaw | VoIP VoFR VoATM | 80, 160 40 to 240 in multiples of 40 40 to 240 in multiples of 40 | 160 240 240 |
g722-64 | VoIP | 80, 160. 240 | 160 |
g723ar53 g723r53 | VoIP VoFR VoATM | 20 to 220 in multiples of 20 20 to 240 in multiples of 20 20 to 240 in multiples of 20 | 20 20 20 |
g723ar63 g723r63 | VoIP VoFR VoATM | 24 to 216 in multiples of 24 24 to 240 in multiples of 24 24 to 240 in multiples of 24 | 24 24 24 |
g726r16 | VoIP VoFR VoATM | 20 to 220 in multiples of 20 10 to 240 in multiples of 10 10 to 240 in multiples of 10 | 40 60 60 |
g726r24 | VoIP VoFR VoATM | 30 to 210 in multiples of 30 15 to 240 in multiples of 15 30 to 240 in multiples of 15 | 60 90 90 |
g726r32 | VoIP VoFR VoATM | 40 to 200 in multiples of 40 20 to 240 in multiples of 20 40 to 240 in multiples of 20 | 80 120 120 |
g728 | VoIP VoFR VoATM | 10 to 230 in multiples of 10 10 to 240 in multiples of 10 10 to 240 in multiples of 10 | 40 60 60 |
g729abr8 g729ar8 g729br8 g729r8 | VoIP VoFR VoATM | 10 to 230 in multiples of 10 10 to 240 in multiples of 10 10 to 240 in multiples of 10 | 20 30 30 |
Description | |
---|---|
codec (DSP interface dsp farm) | Specifies call density and codec complexity. |
codec (voice port) | Specifies voice compression. |
codec complexity | Specifies call density and codec complexity based on the codec used. |
show dial peer voice | Displays the codec setting for dial peers. |
codec-type | Specifies the codec preferred. •g711alaw—G.711 a-law 64,000 bps. •g711ulaw—G.711 u-law 64,000 bps. •g722r-64--G.722-64 at 64,000 bps •g729abr8—G.729 ANNEX A and B 8000 bps. •g729br8—G.729 ANNEX B 8,000 bps. •g729ar8--G.729 ANNEX A and R 8000 bps. •g729r8—G.729 8000 bps. |
pass-through | Enables codec pass-through. Supported for transcoding and MTP profiles. |
Modification | |
---|---|
12.3(8)T | This command was introduced. |
12.4(4)T | The pass-through keyword was added. |
12.4(15)XY | The g722-64 keyword was added. |
Description | |
---|---|
associate application | Associates the SCCP protocol to the DSP farm profile. |
dspfarm profile | Enters DSP farm profile configuration mode and defines a profile for DSP farm services. |
maximum sessions (DSP Farm profile) | Specifies the maximum number of sessions that are supported by the profile. |
rsvp | Enables RSVP support on a transcoding or MTP device. |
shutdown (DSP Farm profile) | Disables a DSP farm profile. |
value | The order of preference, with 1 being the most preferred and 14 being the least preferred. |
codec-type | The codec preferred. Values are as follows: •clear-channel—Clear Channel 64,000 bps •g711alaw—G.711 a law 64,000 bps •g711ulaw—G.711 mu-law 64,000 bps •g722r-64--G.722-64 at 64,000 bps •g723ar53—G.723.1 ANNEX-A 5300 bps •g723ar63—G.723.1 ANNEX-A 6300 bps •g723r53—G.723.1 5300 bps •g723r63—G.723.1 6300 bps •g726r16—G.726 16,000 bps •g726r24—G.726 24,000 bps •g726r32—G.726 32,000 bps •g728—G.728 16,000 bps •g729abr8—G.729 ANNEX-A and B 8000 bps •g729br8—G.729 ANNEX-B 8000 bps •g729r8—G.729 8000 bps •gsmamr-nb—Enables GSMAMR codec capability •ilbc--internet Low Bitrate Codec (iLBC) at 13,330 bps or 15,200 bps. •transparent—Enables codec capabilities to be passed transparently between endpoints Note The transparent keyword not supported when the call-start command is configured. |
mode | (Optional) For iLBC codecs only. Specifies the iLBC operating frame mode that is encapsulated in each packet. |
frame_size | (Optional) For iLBC codecs only. iLBC operating frame in milliseconds (ms). Valid entries are: •20—20ms frames for 15.2kbps bit rate •30—30ms frames for 13.33 kbps bit rate Default is 20. |
bytes | (Optional) Specifies that the size of the voice frame is in bytes. |
payload-size | (Optional) Number of bytes you specify as the voice payload of each frame. Values depend on the codec type and the packet voice protocol. |
packetization-period 20 | (Optional) Sets the packetization period at 20 ms. Applicable only to GSMAMR-NB codec support. |
encap rfc3267 | (Optional) Sets the encapsulation value to comply with RFC 3267. Applicable only to GSMAMR-NB codec support. |
frame-format | (Optional) Specifies a frame format. Supported values are octet-aligned and bandwidth-efficient. The default is octet-aligned. Applicable only to GSMAMR-NB codec support. |
crc | no-crc | (Optional) CRC is applicable only for octet-aligned frame format. If you enter bandwidth-efficient frame format, the crc | no-crc options will not be available because they are inapplicable. Applicable only to GSMAMR-NB codec support. |
modes modes-values | (Optional) Valid values are from 0 to 7. You can specify modes as a range (for example, 0-2), or individual modes separated by commas (for example, 2,4,6), or a combination of the two (for example, 0-2,4,6-7). Applicable only to GSMAMR-NB codec support. |
Modification | |
---|---|
12.0(2)XH | This command was introduced on the Cisco AS5300. |
12.0(7)T | This command was implemented on the Cisco 2600 series and Cisco 3600 series. |
12.0(7)XK | This command was implemented on the Cisco MC3810. |
12.1(2)T | This command was integrated into Cisco Release IOS Release 12.1(2)T. |
12.1(5)T | The codecs gsmefr and gsmfr were added. |
12.2(13)T3 | The transparent keyword was added. |
12.4(4)T | The codecs gsmefr and gsmfr were removed. |
12.4(4)XC | This command was extended to include GSMAMR-NB codec parameters on the Cisco AS5350XM and Cisco AS5400XM platforms. |
12.4(9)T | This command was integrated into Cisco IOS Release 12.4(9)T. |
12.4(11)T | The ilbc codec and mode keyword were added. |
12.4(15)XY | The g722r-64 keyword was added. |
Protocol | Default Voice Payload (in Bytes) | ||
---|---|---|---|
VoIP VoFR VoATM | 80, 160 40 to 240 in multiples of 40 40 to 240 in multiples of 40 | 160 240 240 | |
g722r-64 | VoIP | 80, 160, 240 | 160 |
VoIP VoFR VoATM | 20 to 220 in multiples of 20 20 to 240 in multiples of 20 20 to 240 in multiples of 20 | 20 20 20 | |
g723ar63 g723r63 | VoIP VoFR VoATM | 24 to 216 in multiples of 24 24 to 240 in multiples of 24 24 to 240 in multiples of 24 | 24 24 24 |
VoIP VoFR VoATM | 20 to 220 in multiples of 20 10 to 240 in multiples of 10 10 to 240 in multiples of 10 | 40 60 60 | |
g726r24 | VoIP VoFR VoATM | 30 to 210 in multiples of 30 15 to 240 in multiples of 15 30 to 240 in multiples of 15 | 60 90 90 |
VoIP VoFR VoATM | 40 to 200 in multiples of 40 20 to 240 in multiples of 20 40 to 240 in multiples of 20 | 80 120 120 | |
g728 | VoIP VoFR VoATM | 10 to 230 in multiples of 10 10 to 240 in multiples of 10 10 to 240 in multiples of 10 | 40 60 60 |
VoIP VoFR VoATM | 10 to 230 in multiples of 10 10 to 240 in multiples of 10 10 to 240 in multiples of 10 | 20 30 30 | |
ilbc | VoIP | For mode20, 38, 76, 114, 152, 190, 228. For mode30, 50, 100, 150, 200 | 38 50 |
Description | |
call-start | Forces an H.323 Version 2 gateway to use fast connect or slow connect procedures for a dial peer. |
voice class codec | Enters voice-class configuration mode and assigns an identification tag number to a codec voice class. |
voice-class codec (dial peer) | Assigns a previously configured codec selection preference list to a dial peer. |
Releases | ||
---|---|---|
iLBC Codec Support | 12.4(11)T | The internet Low Bitrate Codec (iLBC) is a standard, high-complexity speech codec that is suitable for robust voice communication over IP. iLBC has built-in error correction functionality that helps the codec perform in networks with a high-packet loss. |
G.722-64 and iLBC Codec Support on Cisco UBEs, DSP Farms, and Voice Gateways | 12.4(15)XY | The G.722-64 and iLBC codecs are supported for Cisco UBEs, DSP farms, and voice gateways. Conferencing and universal transcoding are supported on both codecs. |
uname -i
return x86_64