AudioCodes Mediant 500 MSBR, User Manual

Page: 1046 / 1248

User's Manual 1046 Document #: LTRT-10375
Mediant 500 MSBR
74.7 General SIP Parameters
The general SIP parameters are described in the table below.
Table 74-33: General SIP Parameters
Parameter Description
[MaxSDPSessionVersionI
d] Defines the maximum number of characters allowed in the SDP body's
"o=" (originator and session identifier) field for the session ID and
session version values. An example of an "o=" line with session ID and
session version values (in bold) is shown below:
o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5
The valid value range is 1,000 to 214,748,3647 (default).
[UseRandomUser] Enables the device to assign a random string value to the user part of
the SIP Contact header for new user Account registrations with the
device. The assigned user part 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. These assigned user parts are also used for registration refreshes
and for un-registering these Accounts. The assigned user parts are
used until the parameter is disabled. When enabled again, new random
user parts are assigned to the Accounts.

[0] = (Default) Disable

[1] = Enable
To configure Accounts, see Configuring Registration Accounts on page
363.
[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 on page
363.
Send reject on overload
configure voip > sip-
definition settings > reject-
on-ovrld
[SendRejectOnOverload]
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.
SIP 408 Response upon
non-INVITE
configure voip > sip-
definition settings > enbl-
non-inv-408
Enables the device to send SIP 408 responses (Request Timeout) upon
receipt of non-INVITE transactions. Disabling this response complies
with RFC 4320/4321. By default, and in certain circumstances such as a
timeout expiry, the device sends a SIP 408 Request Timeout in
response to non-INVITE requests (e.g., REGISTER).