AudioCodes Mediant 4000 SBC, User Manual

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CHAPTER 60 Configuration Parameters Reference
Mediant 4000 SBC | User's Manual
Parameter Description
[UseRandomUser] Enables the device to assign a random string value for the user part
of the SIP Contact header in the REGISTER message (generated
by the device) for new user Account registrations with the device.
■ [0] = (Default) Disable
■ [1] = Enable
The string includes letters and may include numbers, but it always
begins with a letter. The string is unique to each Account. An
example of a randomly assigned user part is shown (in bold) below:
Contact: <sip:
HRaNEmZnfX6xZl4
@pc33.atlanta.com>
When enabled, each Account registers with its unique user part, and
all INVITE messages for this new Account are sent with this unique
user part. The assigned user parts are also used for registration
refreshes and for un-registering these Accounts.
The device stops using the random user part in the following
scenarios:
■ The user sends an unregister request.
■ The device sends a REGISTER request for the user, but does
not receive a SIP 200 OK in response.
■ The parameter is disabled. When enabled again, new random
user parts are assigned to the Accounts.
To configure Accounts, see Configuring Registration Accounts .
[UnregisterOnStartup] Enables the device to unregister all user Accounts that were
registered with the device, upon a device reset. During device start-
up, each Account sends a REGISTER message (containing
"Contact: *") to unregister all contact URIs belonging to its Address-
of-Record (AOR), and then a second after they are unregistered, the
device re-registers the Account.
■ [0] = (Default) Disable
■ [1] = Enable
To configure Accounts, see Configuring Registration Accounts .
'Send Reject (503)
upon Overload'
configure voip >
sip-definition
settings >
reject-on-ovrld
[SendRejectOnOverlo
ad]
Disables the sending of SIP 503 (Service Unavailable) responses
upon receipt of new SIP dialog-initiating requests when the device's
CPU is overloaded and thus, unable to accept and process new SIP
messages.
■ [0] Disable = No SIP 503 response is sent when CPU
overloaded.
■ [1] Enable = (Default) SIP 503 response is sent when CPU
overloaded.
■ Note: Even if the parameter is disabled (i.e., 503 is not sent), the
device still discards the new SIP dialog-initiating requests when
the CPU is overloaded.
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