AudioCodes Mediant 800 MSBG - SBC Application

SIP User's Manual 480 Document #: LTRT-12804
Mediant 800 MSBG
8.4 SBC Application
This section provides a detailed description of the device's SBC application.
This section includes the following subsections:
 Overview of the SBC application (see ''Overview'' on page 480)
 SIP networking definition
s (see ''SIP Network Definitions'' on page 482)
 SIP dialog-ini
tiation process (see ''SIP Dialog Initiation Process'' on page 482)
 User regi
stration and the device's database (see ''User Registration and Internal
Database'' on page 490)
 Media ha
ndling (see ''SBC Media Handling'' on page 493)
 SBC Dialo
g Admission Control (see ''SIP Dialog Admission Control'' on page 502)
 Han
dling SIP 3xx Redirect Responses (see ''Handling SIP 3xx Redirect Responses''
on page 503)
 SIP Diversion
and History-Info headers interworking (see ''Interworking SIP Diversion
and History-Info Headers'' on page 505)
 SBC config
uration example (see SBC Configuration Example on page 546
8.4.1 Overview
The SBC application supports up to 150 SBC sessions and provides the following main
features:
 NAT traversal (see ''NAT Traversal'' on page 481)
 VoIP firewall and security for sig
naling and media (see ''VoIP Firewall'' on page 481)
 Topolo
gy hiding (see ''Topology Hiding'' on page 481)
 SIP normalization (see ''SI
P Normalization'' on page 482)
 Survivability (see ''S
urvivability'' on page 482)
 Routin
g (see ''SIP Network Definitions'' on page 482 a
nd ''SIP Dialog Initiation
Process'' on page 482):
• IP-to-IP routing translations of SIP, UDP, TCP, TLS (when extensive transcoding
is not required)
• Load balancing and redundancy of SIP servers
• Routing according to Request-URI\Specific IP address\Proxy\FQDN
• Alternative routing
• Routing between different Layer-3 networks (e.g., LAN and WAN)
 Load balancing\redundancy of SIP servers
 Internet Telephony Service Providers (ITSP) accounts
 SIP URI user and host name manipulations (see ''SIP Dialog Initiation Process'' on
page 482)
 Cod
er Transcoding (see ''SBC Media Handling'' on page 493)