User's Manual  1122  Document #: LTRT-10632 
 
  Mediant 800B Gateway & E-SBC 
Parameter  Description 
Media Realm Extension 
configure voip > realm-
extension 
[MediaRealmExtension] 
Defines Media Realm Extensions. 
The format of the ini file table parameter is as follows: 
[ MediaRealmExtension ] 
FORMAT MediaRealmExtension_Index = 
MediaRealmExtension_MediaRealmIndex, 
MediaRealmExtension_ExtensionIndex, MediaRealmExtension_IPv4IF, 
MediaRealmExtension_IPv6IF, MediaRealmExtension_PortRangeStart, 
MediaRealmExtension_PortRangeEnd, 
MediaRealmExtension_MediaSessionLeg; 
[ \MediaRealmExtension ] 
For more information, see 'Configuring Media Realm Extensions' on 
page 345. 
 
 
72.8  General SIP Parameters 
The general SIP parameters are described in the table below. 
Table  72-34: General SIP Parameters 
Parameter  Description 
[MaxSDPSessionVersionId]  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 
395. 
[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). 
A second after they are unregistered, the device re-registers the 
Account.  
  [0] = (Default) Disable 
  [1] = Enable