Version 7.2 361 Mediant 1000B Gateway & E-SBC
User's Manual 18. SIP Definitions
18 SIP Definitions
This section describes configuration of various SIP-related functionalities.
18.1 Configuring Registration Accounts
The Accounts table lets you configure up to 102 Accounts. An Account defines registration
information for registering and authenticating (digest) Trunk Groups (e.g., PBX) or IP
Groups (e.g., IP PBX) with a "serving" IP Group (e.g., ITSP).
The device initiates registration with a "serving" IP Group on behalf of the "served" Trunk
Group or IP Group. Therefore, Accounts are typically required when the "served" Trunk
Group or IP Group is unable to register or authenticate itself for whatever reason.
Registration information includes username, password, host name (AOR), and contact user
name (AOR). The device includes this information in the REGISTER message sent to the
serving IP Group. Up to 10 Accounts can be configured per "served" Trunk Group or IP
Group. A Trunk Group or IP Group can register to more than one IP Group (e.g., multiple
ITSPs). This is done by configuring multiple entries in the Accounts table for the same
served Trunk Group or IP Group, but with different serving IP Groups, username/password,
host name, and contact user values.
Authentication is typically required for INVITE messages sent to the "serving" IP Group. If
the device receives a SIP 401 (Unauthorized) in response to a sent INVITE, the device
checks for a matching "serving" and "served" entry in the Accounts table. If a matching row
exists, the device authenticates the INVITE by providing the corresponding MD5
authentication username and password to the "serving" IP Group.
Note: If no match is found in the Accounts table for incoming or outgoing calls, the
username and password is taken from:
• FXS interfaces: Authentication table (see Configuring Authentication on page 579
per Port)
• 'UserName' and 'Password' parameters on the Proxy & Registration page
The following procedure describes how to configure Accounts through the Web interface.
You can also configure it through ini file (Account) or CLI (configure voip > sip-definition
account).
 To configure an Account:
1. Open the Accounts table (Setup menu > Signaling & Media tab > SIP Definitions
folder > Accounts).
2. Click New; the following dialog box appears:
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