User guide

VoIP System Telephones130
Voice over IP (VoIP)
1. Temporarily remove the VoIP system telephone’s ethernet
connection. Switch on the VoIP system telephone’s power
supply. Note the MAC address shown in the display, for
instance “MAC: 00:30:42:00:00:00”. Switch off the power
supply.
2. In the Configurator, open the Telephony: Devices: VoIP
Phones page. Click on the New button.
3. Select the VoIP system telephone’s Type and enter the
previously noted MAC address. Assign a Name and Phone
No. Confirm with Apply.
4. Connect the ethernet connection with the VoIP system
telephone’s RJ45 connector. Switch on the power supply.
Verify the correct start procedure on the display.
LAN DHCP Server
If the LAN already uses a DHCP server to configure workstation
computers, there are various options for correctly 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 handbook. The MAC address of all
VoIP system telephones always begins with 00:30:42.