TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
28
6
IP – Priority and Security settings
6.1
Settings – Priority and Security
1
Select IP > Settings.
Figure 23. Priority and Security
2
Enable/Enter following settings.
Figure 23.
Field name
Description
• TOS priority -
RTP Data
(set to 0xB8 for
Ascom i75 use)
Configuration of the TOS (Type of Service) value for media (for
example voice) packets. TOS determines the priority from the
TOS field in the IP header. If your router can use TOS priority
control you can use this function.
Hexadecimal, octal or decimal values can be used; 0x10, 020
and 16 are all equivalent.
Default the VoIP Gateway sets the TOS field to 0x10 for all IP
packets that it transmits. This value must be changed to 0xB8
which works better for VoIP.
Note:
Remember that the same value should be set in the
TOS field for all devices.
• TOS priority -
Signalling
Configuration of the TOS value for signalling (e.g. H.323 or
SIP) packets.
Note:
leave the following at default settings for the normal case.
•
•
First UDP-RTP port
Number of ports
Specify the first port in the port range for the UDP-RTP traffic
(User Datagram Protocol/Real Time Protocol). Used to narrow
down the port ranges to be opened in a firewall.
Specify number of ports.
(Default RTP port range is from 16384 to 32767)
•
•
First UDP-NAT port
Number of ports
Specify the first port for the UDP-NAT (User Datagram
Protocol/Network Address Translation). Must be configured
for UDP-NAT to work.
Specify number of ports.
Local Networks:
Here you can specify ip addresses or address ranges to be part
of the local network.
This configuration influences the coder selection process on
VOIP endpoints like telephones and physical Gateway
interfaces.
