Media5 Mediatrix 4104, Reference Manual

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Chapter 18 - SIP Protocol Features Publication Parameters
268 Mediatrix 4104

To refresh the publications:
1. In the sipMIB , set the sipPublicationCmdRefresh variable with the proper behaviour.
The following values are available:
• noOp: No operation.
• refresh: Refresh publications.
2. Define the time, in seconds, at which the User Agent begins refreshing its publication before the
publication expiration in the
sipPublicationRefreshTime variable.
A publication is valid for a period of time specified by the Presence Compositor. The User Agent is
then responsible for refreshing its previously established publications before their expiration interval
has elapsed.
For instance, if the publication lasts 60 minutes and this variable is set to 43, the unit sends new
PUBLISH requests 59 minutes and 17 seconds after the reception of the publication
acknowledgement (43 seconds before the end of the publication period).
Setting this variable to 0 means that the User Agent falls into the 'unpublished' state BEFORE
sending the refreshing PUBLISH request.
Publications Expiration
The SIP protocol allows an entity to specify the “expires” parameter of a contact in a PUBLISH request. The
server can return this “expires” parameter in the 200 OK response or select another “expires”. In the PUBLISH
request, the “expires” is a suggestion the entity makes.
The “expires” parameter indicates how long, in seconds, the user agent would like the binding to be valid.
You can configure the “expires” parameter the Mediatrix 4104 sends.

To configure the publications expiration:
1. In the sipMIB , set the sipPublicationProposedExpirationValue variable with the suggested
expiration delay, in seconds, of a publication in the PUBLISH request.
Keep in mind that this is only a suggestion and that servers will decide the publication time following
local policy.
Available values are from 1 s to 86,400 s (one day).
This value does not modify the delay before a re-PUBLISH.
• The delay is the value of the Expires header in the 200 OK response to the PUBLISH
minus the value set in the
sipPublicationRefreshTime variable.
• If the Expires header in the 200 OK response to the PUBLISH is not present or badly
formatted, then the delay is the value of the variable
sipInteropDefaultPublicationExpiration minus the value set in the
sipPublicationRefreshTime variable.
See “Refreshing Publications” on page 267 for more details.
Setting the variable to 0 disables the expiration suggestion.
Default Publication Expiration
You can configure the value of the default registration expiration.

To configure the default publication expiration:
1. In the sipInteropMIB , set the sipInteropDefaultPublicationExpiration variable with the default
publication expiration.
The delay before a re-PUBLISH is the value set in the sipInteropDefaultPublicationExpiration
variable minus the value set in the sipPublicationRefreshTime variable. See “Refreshing
Publications” on page 267 for more details.
2. Restart the Mediatrix 4104 so that the change may take effect.