Parameter: Allow low-delay media relay
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| − | Allow low-delay media relay (without transcoding) | + | Allow low-delay media relay (without transcoding) between two joined legs. |
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| − | * | + | This mode is only available on SBC units (not on TMG units). |
| − | *No IVR is required (play | + | |
| + | The low-delay media relay mode eliminates any VoIP audio delay caused by the SBC for IP to IP calls, by eliminating the need for jitter buffer, de-packetization and re-packetization. With low-delay mode, packets get routed directly from one leg to the other with 0ms delay. | ||
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| + | When this mode is enabled in a profile, it will be effective only if: | ||
| + | *Both joined call legs use NAPs where the [[Toolpack:Creating_an_IP_Port_Range_D|RTP port ranges]] are on SBC-protected VLANs | ||
| + | *Both call legs have been able to negotiate a compatible audio codec | ||
| + | *No IVR is required (play file, record file, play tone or detect tone). | ||
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| + | Enabling the low-delay mode will also allow a variant: Use the RTP no-anchoring mode. | ||
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[[Category: Parameters]] | [[Category: Parameters]] | ||
Revision as of 16:39, 18 January 2018
Allow low-delay media relay (without transcoding) between two joined legs.
This mode is only available on SBC units (not on TMG units).
The low-delay media relay mode eliminates any VoIP audio delay caused by the SBC for IP to IP calls, by eliminating the need for jitter buffer, de-packetization and re-packetization. With low-delay mode, packets get routed directly from one leg to the other with 0ms delay.
When this mode is enabled in a profile, it will be effective only if:
- Both joined call legs use NAPs where the RTP port ranges are on SBC-protected VLANs
- Both call legs have been able to negotiate a compatible audio codec
- No IVR is required (play file, record file, play tone or detect tone).
Enabling the low-delay mode will also allow a variant: Use the RTP no-anchoring mode.
