CHAPTER 22 SBC Overview
Mediant 4000 SBC | User's Manual
■
Avoids interference in SDP negotiation and header manipulation on RTP/SRTP
Direct media is typically implemented for calls between users located in the same LAN or domain,
and where NAT traversal is not required and other media handling features such as media
transcoding is not required. The following figure provides an example of direct media between LAN
IP phones, while SIP signaling continues to traverse the device between LAN IP phones and the
hosted WAN IP-PBX.
➢
To enable direct media:
■
For all calls:
Use the global parameter, SBCDirectMedia (overrides all other direct media
configuration).
■
For specific calls:
●
SIP Interface: You can enable direct media per SIP Interface (in the SIP Interfaces table),
whereby calls (source and destination) associated with
this same
SIP Interface are
handled as direct media calls. The SIP Interface can also enable direct media for users
located behind the same NAT. For more information, see
●
Direct Media Tag: You can enable direct media between users that are configured with the
same Direct Media tag value. The tag is configured using the IP Profiles table's IPProfile_
SBCDirectMediaTag parameter (see
).
The device employs direct media between endpoints under the following configuration conditions
(listed in chronological order):
1.
Direct media is enabled by the global parameter (SBCDirectMedia).
2.
IP Groups of the endpoints are associated with IP Profiles whose 'Direct Media Tag' parameter
has the same value (non-empty value).
3.
IP Groups of the endpoints have the 'SBC Operation Mode' parameter set to
Microsoft Server
(direct media is required in the Skype for Business environment). For more information, see
4.
IP Groups of the endpoints use the same SIP Interface and the SIP Interface's 'SBC Direct
Media' parameter is set to
Enable
(SIPInterface_SBCDirectMedia = 1).
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Summary of Contents for Mediant 4000 SBC
Page 1: ...User s Manual AudioCodes Series of Session Border Controllers SBC Mediant 4000 SBC Version 7 2...
Page 40: ...Part I Getting Started with Initial Connectivity...
Page 48: ...Part II Management Tools...
Page 113: ...Part III General System Settings...
Page 118: ...Part IV General VoIP Configuration...
Page 525: ...Part V Session Border Controller Application...
Page 654: ...Part VI Cloud Resilience Package...
Page 663: ...Part VII High Availability System...
Page 685: ...Part VIII Maintenance...
Page 759: ...Part IX Status Performance Monitoring and Reporting...
Page 844: ...Part X Diagnostics...
Page 888: ...Part XI Appendix...