You can configure a Media Port Range for each Trunk Group to specify a range of values when allocating UDP ports. To provision a UDP media port range slightly larger than the actual count of ports ostensibly required to support the maximum simultaneous calls (not applicable to TCP media). The system reserves two UDP ports for each incoming UDP media call leg: one for (S)RTP and one for (S)RTCP. Thus, a configured port range must contain at least twice as many port numbers as the maximum simultaneous calls to be supported for that IPTG (not applicable to TCP media).
To View and Edit Media Port Range
On the SBC main screen, go to All > Zone > GW Trunk Group > Media > Media Port Range.
Select the desired Address Context, Zone and GW Trunk Group from the drop-down list to view its respective Media Port Range parameters.
GW Trunk Group - Media Port Range Parameters:
| Parameter | Length/Range | Description |
|---|---|---|
| Base UDP Port | none, or 1024-65534 | Enter the start of the range of UDP ports to use for media. This value must be within the system-wide media port range. Use the default value of "none" to ignore this control and instead use the system-wide Media Port Range settings. |
| Max UDP Port | none, or 1024-65534 | Enter the end of the range of UDP ports to use for media. This value must be greater than the Base UDP port and within the system-wide media port range. Use the default value of "none" to ignore this control and instead use the system-wide Media Port Range settings. |
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