User's Manual  1068  Document #: LTRT-10532 
 
  Mediant 500L Gateway & E-SBC 
Parameter  Description 
definition settings > reject-
on-ovrld 
[SendRejectOnOverload] 
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 
[EnableNonInvite408Reply] 
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).  
  [0] Disable = SIP 408 response is not sent upon receipt of non-
INVITE messages (to comply with RFC 4320). 
  [1] Enable = (Default) SIP 408 response is sent upon receipt of 
non-INVITE messages, if necessary. 
Remote Management by 
SIP Notify 
configure voip > sip-
definition settings > sip-
remote-reset 
[EnableSIPRemoteReset] 
Enables a specific device action upon the receipt of a SIP NOTIFY 
request, where the action depends on the value received in the Event 
header. 
  [0] Disable (default) 
  [1] Enable 
The action depends on the Event header value: 
  'check-sync;reboot=false': triggers the regular Automatic Update 
feature (if Automatic Update has been enabled on the device) 
  'check-sync;reboot=true': triggers a device reset 
Note: The Event header value is proprietary to AudioCodes. 
Max SIP Message Length 
[KB] 
[MaxSIPMessageLength] 
Defines the maximum size (in Kbytes) for each SIP message that can 
be sent over the network. The device rejects messages exceeding this 
user-defined size. 
The valid value range is 1 to 100. The default is 100. 
[SIPForceRport]  Determines whether the device sends SIP responses to the UDP port 
from where SIP requests are received even if the 'rport' parameter is 
not present in the SIP Via header. 
  [0] = (Default) Disabled. The device sends the SIP response to the 
UDP port defined in the Via header. If the Via header contains the 
'rport' parameter, the response is sent to the UDP port from where 
the SIP request is received. 
  [1] = Enabled. SIP responses are sent to the UDP port from where 
SIP requests are received even if the 'rport' parameter is not 
present in the Via header. 
Reject Cancel after Connect 
configure voip > sip-
definition settings > reject-
cancel-after-connect 
[RejectCancelAfterConnect] 
Enables or disables the device to accept or reject SIP CANCEL 
requests received after the receipt of a 200 OK in response to an 
INVITE (i.e., call established). According to the SIP standard, a 
CANCEL can be sent only during the INVITE transaction (before 200 
OK), and once a 200 OK response is received the call can be rejected 
only by a BYE request. 
  [0] Disable = (Default) Accepts a CANCEL request received during