102
Voice over IP (VoIP)
VoIP System Telephones
LAN DHCP Server
If the LAN already uses a DHCP server to configure workstation computers, there are various options for cor-
rectly responding to VoIP system telephones’ DHCP, BOOTP and TFTP requests. A comparatively simple
approach is described here.
1.
Configure the LAN’s DHCP server to ignore DHCP requests from the VoIP system telephones. With a
Linux DHCP server programme, you must, for example, include the following lines in the system file
“/etc/dhcpd.conf”:
group {
deny booting;
host 192.168.11.12 {
hardware ethernet
00:30:42:00:11:22;
}
}
Every DHCP service programme has similar options. You may need to reserve a free IP address for each
VoIP system telephone. You will find more details in your DHCP service programme’s online help or hand-
book. The MAC address of all VoIP system telephones always begins with 00:30:42.
2. Configure a fixed IP address for the Comfort Pro S. To do this, call up the
Configurator
and open the
NET Configuration: LAN
page. Click on the
Change
button.
3. Select from
Get addresses from the DHCP server
the option
no
. Enter the current IP address configu-
ration in
IP address
and
Network mask
. Confirm with
Apply
.
4. Configure the Comfort Pro S’s DHCP server to assign IP addresses. To do this, call up the
Configurator
and open the
NET Configuration: LAN: DHCP Server
page. Click on the
Change
button.
5. From
Status
, select the
address assignment
option. Confirm with
Apply
. The
DHCP Server
page is re-
displayed.
6. Add the configured VoIP system telephones to the list of IP addresses. Click on the
New
button.
Summary of Contents for Comfort Pro S
Page 1: ...Comfort Pro S Mounting and Commissioning Installation Guide...
Page 2: ......
Page 166: ...164 Index Notes...
Page 167: ......
