User's Manual 548 Document #: LTRT-89730
Mediant 3000
• Strips all incoming SIP Via header fields and creates a new Via value for the
outgoing message.
• Each leg has its own Route/Record Route set.
• User-defined manipulation of SIP To, From, and Request-URI host names.
• Generates a new SIP Call-ID header value (different between legs).
• Changes the SIP Contact header and sets it to the device's address.
• Layer-3 topology hiding by modifying source IP address in the SIP IP header.
SIP normalization: The device supports SIP normalization, whereby the SBC
application can overcome interoperability problems between SIP user agents. This is
achieved by the following:
• Manipulation of SIP URI user and host parts.
• Connection to ITSP SIP trunks on behalf of an IP-PBX - the device can register
and utilize user and password to authenticate for the IP-PBX.
Survivability:
• Routing calls to alternative routes such as the PSTN.
• Routing calls between user agents in the local network using a dynamic database
(built according to registrations of SIP user agents).
Routing:
• 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.
ITSP accounts.
SIP URI user and host name manipulations.
Coder transcoding.
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