
132 Chapter 7 Optional VoIP trunk configurations
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Figure 45 Port ranges dialog box
4 Enter the new port settings.
5 Click the Save button.
Port settings for legacy networks
Business Communications Manager uses UDP port ranges to provide high priority to VoIP packets
in existing legacy IP networks. You must reserve these same port ranges and set them to high
priority on all routers that an administrator expects to have QoS support. You do not need to
reserve port ranges on DiffServ networks.
You can select any port ranges that are not used by well-known protocols or applications.
Each H.323 or VoIP Realtime Transfer Protocol (RTP) flow uses two ports, one for each direction.
The total number of UDP port numbers to be reserved depends on how many concurrent RTP
flows are expected to cross a router interface. In general:
• Include port number UDP 5000 in the reserved port ranges, for the QoS monitor.
• The port ranges reserved in a Business Communications Manager system are also reserved by
the remote router.
• You must reserve two ports for each voice call you expect to carry over the WAN link.
Table 30 Media parameters record
Field Value Description
PortRange (R#) (read only) This field indicates the range of ports that are available for
this application.
Begin <range
1024-65534>
This indicates the first port setting in the range.
End <range
1025-65535>
This indicates the last port setting in the range.
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