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Voice over IP (VoIP) VoIP System Telephones
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Standard operating procedure is to contact the Aastra 800’s DHCP server so that
the start procedure can be concluded without problems. To register a new VoIP
system telephone, proceed as follows:
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 con-
nector. Switch on the power supply. Verify the correct start procedure on the
display.
7.4.3 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 program, 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 program 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 program’s online help or handbook. The MAC address of all
VoIP system telephones always begins with 00:30:42.