A SIP Filter Profile is a collection of the configurable filter settings of individual SIP headers. Depending on the filter settings of each of the SIP headers in the SIP Filter Profile, the SBC either relays the SIP messages without parsing the header, or parses the headers of the messages.
For every SIP message associated with the ingress leg of the call, the SBC first checks the SIP Filter Profile for the filter setting of the SIP header. If the SIP Filter Profile indicates that a particular SIP header needs filtering, the SBC stores it without parsing.
A SIP Filter Profile is not used for the egress leg of a call. The SIP header of the egress leg is populated on the basis of the configuration in the IP Signaling Profile and the Transparency Profile. For more information on Transparency Profile and SIP header transparency, refer to Transparency Profile and SBC SIP Transparency Implementation Guide respectively.
- In the SIP Filter Profile, the default filter setting of all the headers is
disabled. To filter a particular SIP header, change the setting toenabled. - The SBC supports attaching a SIP Filter Profile to a SIP Trunk Group. If no SIP Filter Profile is configured for a SIP Trunk Group at the time of its creation, the default SIP Filter Profile is attached with the SIP Trunk Group.
- Even if the filter setting for an unknown header is set to
disabled, the SBC transparently relays the SIP messages containing that header in the following cases:
- The flexible header transparency indicates that the particular header should be transparently relayed.
- The IP Signaling Profile indicates that the particular header should be transparently relayed. To transparently pass all unknown headers, set the transparency of the unknown headers to
enabledin the IP Signaling Profile.
Note
A filtered header of a call in a Gateway-Gateway (GW-GW) scenario is not passed to the egress gateway if that header is known to the egress gateway, even if the "unknown" header transparency is enabled.
For example, the P-Asserted-Identity (PAI) header is not passed transparently if the following events occur simultaneously:
- the PAI is filtered on the ingress
- the "unknown" header transparency is enabled on the egress gateway
- the PAI header is known to the egress gateway.
To pass the PAI header transparently on the egress gateway, enable transparency for the PAI header through a SIP Filter Profile.
To create a new SIP Filter Profile
On the SBC main screen, navigate to All > Profiles > Signaling > SIP Filter Profile.
The SIP Filter Profile window is displayed.
SIP Filter Profile window
To create a new SIP Filter Profile, click the New SIP Filter Profile button. The Create New SIP Filter Profile window is displayed.
Create New SIP Filter Profile window
The parameters are described below:
SIP Filter Profile - parameters and descriptions
| Parameter | Description |
|---|---|
SIP Filter Profile | The name of the SIP Filter Profile (1- 23 characters) created, and optionally attached to a SIP Trunk Group. In the default SIP Filter Profile, the transparency setting of all permissible headers is set to A SIP Filter Profile may consist of several SIP Headers for which the filtering needs to be enabled. |
The name of a SIP Filter Profile cannot be edited. It is a "read only" field. However, a SIP Filter Profile can be deleted.
To configure a SIP Filter Profile with a SIP Trunk Group
Prerequisites
To attach a SIP Filter Profile with an existing SIP Trunk Group, the prerequisites are as follows:
- Configuration of the zone ID corresponding to the selected zone.
- Configuration of the Media IP Interface Group Name for the selected SIP Trunk Group.
For details on accomplishing the prerequisite configurations from the EMA, refer to the following pages:
On the SBC main screen, navigate to All > Address Context > Zone > SIP Trunk Group > Signaling.
The Signaling window is displayed. Select suitable values from the following drop-down lists:
- Address Context
- Zone
- SIP Trunk Group
The chosen SIP Trunk Group is the one with which the SIP Filter Profile gets attached.
The frame Edit Signaling is displayed. Find the SIP Filter Profile parameter, and from the adjacent drop-down list, select the name of an SIP Filter Profile which is attached.
Attach SIP Filter Profile with SIP Trunk Group
To save the changes, click Save. To cancel all changes made since the last saved state, click Undo Edits.
To Delete a SIP Filter Profile
To delete a SIP Filter Profile, select the SIP Filter Profile from the table SIP Filter Profile List.
Select SIP Filter Profile
Click on the symbol 
at the extreme right of the selected row. The Delete sipFilterProfile message is displayed. Click Yes to confirm deletion.
Delete Confirmation Prompt
On successful deletion of the selected SIP Filter Profile, the Delete Successful message is displayed.
Successful deletion
Click Ok to complete the deletion process.
Overview
Content Tools