Use the TCP Port Range window to configure a range of TCP ports to use for a specific SIP trunk group. This port range is used by the SBC to advertise the TCP ports on which it can accept connections. A unique unused port from this range is included in the SDP media line in the offer or answer sent towards an MSRP UA. Refer to Configuring MSRP Support for more information.
To View and Edit the TCP Port Range
On the SBC main screen, go to All > Address Context > Zone > SIP Trunk Group > Media > TCP Port Range or
Configuration > System Provisioning > Category: SIP Carrier Peering > SIP Trunk Group > Media > TCP Port Range or
Configuration > System Provisioning > Category: Trunk Provisioning > Trunk Group > SIP Trunk Group > SIP Trunk Advanced > SIP Trunk - Media - Advanced > Media > TCP Port Range
The TCP Port Range window opens. Use the drop-down lists to select the specific Address Context, Zone and SIP Trunk Group you want to configure. The currently configured values for the specified trunk group appear.
Figure 1: SIP Trunk Group - TCP Port Range
Use the following table to change the values as needed and then click Save.
Table 1: SIP Trunk Group - TCP Port Range Parameters
| Parameter | Description |
|---|---|
| Base Server Port | Specifies the start of the range of TCP ports to use for this trunk group. This value must be within the system-level TCP port range. Values between 1-65534 are allowed and the default value is none. If the value is set to none, the value is inherited from the system-level TCP Port Range. |
| Max Server Port | Specifies the end of the range of UDP ports to use for RTP/RTCP media for this trunk group. This value must be greater than the value of Base Server Port |
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