User's Manual
404
Document #: LTRT-89729
Mediant 3000
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.
28.1 SIP Network Definitions
The device's SBC application can implement multiple SIP signaling and RTP (media)
interfaces.
28.2 SIP Dialog Initiation Process
The device's SIP dialog initiation process concerns all incoming SIP dialog initiation
requests. This includes SIP methods such as INVITE, SUBSCRIBE, OPTIONS, REFER,
INFO, UNSOLICITED NOTIFY, MESSAGE, and REGISTER.
The SIP dialog initiation process consists of the following stages:
1.
Determining source and destination URL:
The SIP protocol has more than one
URL in a dialog-establishing request that may represent the source and destination
URLs. When handling an incoming request, the device uses specific SIP headers for
obtaining the source and destination URLs. Once these URLs are determined, their
user and host parts are used as input for the classification process, message
manipulation, and call routing.
•
All SIP requests (e.g., INVITE) except REGISTER dialogs:
♦
Source URL: The source URL is obtained from the SIP header according to
the following logic:
The source URL is obtained from the From header.
If the From header contains the value 'Anonymous', the source URL is
obtained from the P-Preferred-Identity header.
If the P-Preferred-Identity header does not exist, the source URL is
obtained from the P-Asserted-Identity header.
♦
Destination URL: The destination URL is obtained from the Request-URI.
•
REGISTER dialogs:
♦
Source URL: The source URL is obtained from the To header.
♦
Destination URL: The destination URL is obtained from the Request-URI.
Note:
You can determine the SIP header from where the device obtains the source
URL in the incoming SIP request. This is done in the IP Group table using the
'Source URI Input' parameter.
Содержание Mediant 3000
Страница 1: ...User s Manual Version 6 6 Enterprise Session Border Controller VoIP Digital Media Gateway Mediant 3000...
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Страница 21: ...Version 6 6 21 Mediant 3000 User s Manual 1 Overview Figure 1 2 Mediant 3000 TP 6310 Functional Block Diagram...
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Страница 27: ...Part I Getting Started with Initial Connectivity...
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Страница 41: ...Part II Management Tools...
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Страница 113: ...Part IV General VoIP Configuration...
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Страница 515: ...Part X Maintenance...
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Страница 871: ...Version 6 6 871 Mediant 3000 User s Manual 55 Selected Technical Specifications Reader s Notes...
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