User's Manual

40
Setting up Internet telephony (VoIP)
SX682 WiMAX / engbt / SX682_FUG_EN_9 / Advanced_configuration.fm / 17.5.11
Schablone 2011_04_07
Assigning static IP addresses to individual PCs
Even if you have activated the DHCP server, you can still assign a static IP address to
individual PCs (e.g. when setting up these PCs for NAT functions).
 Enter the MAC address of the PC to which you want to assign a static IP address
and the IP address you wish to assign to the PC.
Configuring the local network in Bridge operating mode
In Bridge operating mode (
 page 35) the SX682 WiMAX DHCP server is deactivated.
The network components get their IP addresses from a DHCP server in the public net-
work.
Setting up Internet telephony (VoIP)
The SX682 WiMAX allows you to make phone calls over the Internet with an analogue
telephone. For Internet telephony (VoIP) you need the access authorisation of your pro-
vider and the corresponding access data.
You can connect an analogue telephone, a base for mobile components or a fax
machine to the phone port of your SX682 WiMAX.
To be able to make phone calls over the Internet via VoIP, you will need to set up your
VoIP account using the information supplied by your VoIP provider.
If you have executed the Basic Setup Wizard, you will already have entered these
details there. If necessary you can change them here.
You get the access and configuration data for Internet telephony from your provider.
 Open the Advanced Settings tab and select Telephony.
Ageing time for
MAC table
When a PC in the network is accessed, your SX682 WiMAX writes the
MAC address and port number in a MAC table to speed up further
accesses. The entry in the MAC table is deleted after a fixed time. If
necessary you can change this value via the MAC table ageing time
parameter.
Protection
against DoS
attacks
DoS (Denial of Service) attacks are attacks on a system in the net-
work to make its services unusable. This is basically done by over-
loading the system by constantly sending requests. In Bridge mode,
the SX682 WiMAX provides protection against DoS attacks, which
you can enable or disable via the activate DOS protection parame-
ter.
i
For PPPoE Internet connections, do not change the default setting for
the Internet connection mode (= “Always on”) if you use VoIP (page 35).
You can only receive calls via VoIP if this mode is set. Bear in mind, how-
ever, that this setting may incur high connection costs if you have a time-
based tariff with your Internet provider.