AudioCodes Mediant 4000 SBC User Manual page 651

CHAPTER 28 Advanced SBC Features
■ Managed Opus or Managed G.729: If the SBC detects WAN network impairments during a
call using the Opus or G.729 coder between the Enterprise SBC and Access SBC, it can
adjust the coder's attributes (e.g., bit rate) for that specific call to ensure high voice quality is
maintained. The advantage of these coders is that their bit rate can change dynamically
according to bandwidth availability. This mode is useful for unstable networks, allowing the
coders to dynamically adapt to adverse network conditions.
For Managed Opus, the Enterprise SBC performs transcoding from G.711 (used between
Enterprise phones and SBC) to Opus (used between Enterprise and Access SBCs). For
Managed G.729, the G.729 coder is used by all the involved entities and therefore, transcoding
is not needed. For Managed G.729 operating in an MPLS environment, voice quality can also be
maintained, as mentioned previously.
Configuration of the Enterprise SBC:
● Coder Groups table (see
(depending on Managed coder)
● Allowed Audio Coders Groups table (see
Allowed Audio Coder Group with Opus or G.729 (depending on Managed coder)
● IP Profiles table (see
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● (Managed G.729 Only) MPLSMode (ini file parameter): 0 if no MPLS; 1 if operating in an
MPLS environment
Figure 28-1: VoIPerfect Managed Opus
Figure 28-2: VoIPerfect Managed G.729
Configuring Coder
Configuring IP
(Managed Opus Only) 'Extension Coders Group': Select the Coders Group for Opus
'Allowed Audio Coders': Select the Allowed Audio Coders Group with Opus or G.729
(depending on Managed coder)
'Allowed Coders Mode': Restriction
'Voice Quality Enhancement': Enable
'RTCP Feedback': Feedback On
(Managed Opus Only) 'Max Opus Bandwidth': 0
(Managed G.729 Only) 'Jitter Compensation': Enable
(Managed G.729 Only) 'RTCP Mode': Generate Always
(Managed G.729 Only) 'Dynamic Jitter Buffer Minimum Delay': 40
(Managed G.729 Only) 'Jitter Buffer Max Delay': 500
Groups): Coder Group with Opus or G.729
Configuring Allowed Audio Coder
Profiles):
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Mediant 4000 SBC | User's Manual
Groups):