QX50/QX200/QX2000; (SW Version 6.0.x) 110
QX50/QX200/QX2000 Manual II: Administrator’s Guide
Selecting Use STUN will switch to automatic discovery of Mapped settings for the RTP UDP traffic over NAT. STUN settings are configured on the STUN
Parameters page (see below).
Use Manual NAT Traversal
allows you to manually
define the RTP/RTCP port ranges for the RTP traffic over NAT:
• The Mapped Host text fields require the Mapped Host for
RTP traffic over NAT.
• Mapped RTP/RTCP Port Range:
• Min - minimal port has to be higher than 1024 and lower
than the maximal port range. Only even numbers are
allowed.
• Max - maximal port has to be lower than 65536 and higher
than the minimal port range. Only odd numbers are
allowed.
Please Note: RTP/RTCP Mapped Port ranges should be greater
than or equal to the RTP/RTCP port ranges defined on the
RTP
Settings
page.
Fig.II- 160: NAT traversal Settings - RTP Parameters page
STUN Parameters
The STUN Parameters page enables automatic NAT configuration
through the STUN server and is used to configure the STUN
(Simple Traversal of UDP over NAT) client on the QX IP PBX. This
page requires the following data to be inserted:
The STUN Server text field requires the STUN server’s hostname
or IP address. The STUN Port text field requires the STUN server
port number.
The Secondary STUN Server and Secondary STUN Port text
fields respectively require the parameters of the secondary STUN
server.
The Polling Interval drop down list contains the possible time
intervals between referrals to the STUN server.
Fig.II- 161: NAT traversal Settings - STUN Parameters page
The Keep-alive interval text field provides the options to select the time interval (in seconds) for keeping NAT mapping alive. The value should be in the
range of 10 to 300 seconds.
The NAT IP checking interval text field indicates the interval (in seconds) between the NAT IP checking attempts (used to distinguish the possible NAT
IP address changes and to perform registration on the new host). The value should be in the range of 10 to 3600.
NAT Exclusion
The NAT Exclusion Table lists all possible IP ranges that are not included in the NAT process, but may be accessed directly. IP addresses that are not
listed in the NAT Exclusion Table are accessed over NAT. For example, if a QX IP PBX user needs to make SIP calls within the local network as well as
outside of that network, all local IP addresses are required to be excluded from NAT traversal settings by being listed in this table. Otherwise, a
malfunction may occur in SIP operations.
NAT Exclusion Table
page offers the following input options:
Each record in the table has a corresponding checkbox assigned to
its row. The checkbox is used to delete or to edit the corresponding
record. Only one record may be edited at a time. An error message
will appear if no selection is made or more than one is selected.
Each column heading in the table is a link. By clicking on the
column heading, the table will be sorted by the selected column.
When sorting (ascending or descending), arrows will be displayed
next to the column heading.
Add
Add Entry
page where a new IP range can be
added.
Fig.II- 162: NAT traversal Settings - NAT Exclusion Table page