User guide

Forum 523/524 in a LAN with an IP-enabled Server94
Configuration Examples
1. Call up the Network: DHCP page. Click Change.
2. In the Status selection, change to the Dynamic address
assignment or to the Dynamic and static address
assignment setting.
3. In the Devices selection, change to the with configured
MAC only setting.
For SIP system telephones (Forum IPhone 512 /
Forum IPhone 545), it is also possible to omit the configuration
of the MAC address (see Forum IPhone 512 /
Forum IPhone 545 DHCP starting on page 125). In the
Devices selection, change to the with configured MAC only
and SIP system devices setting. Please note, that you also
need to exclude from the configuration of an external DHCP
server all MAC addresses starting with 00:08:5D.
4. Confirm with Apply.
By activating the limitation to specific devices, only known devices
can get a DHCP answer. For this, the IP address is taken from the
address range used for dynamic address allocation. If you setup a
new VoIP device, it is sufficient to enter only the MAC address.
DNS Name Resolution
In a LAN with an IP-enabled server, the latter is also responsible
for DNS name resolution. If you want to start the Configurator
by entering a DNS name, you must link this name on the server
with the IP address used by the Forum 523/524. For further infor-
mation, refer to the server documentation.
Note: To access the Forum 523/524 under the same IP address
after a restart, you must specify this IP address permanently on a
DHCP server. On a DHCP server it is possible to link the MAC
address of a network card with a specific IP address. You will find
details in the server documentation.