Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
33
7 Ethernet – IP Interface Parameters
• ETH0 port works as a DHCP client the first time the device is switched on (powered
up). After a restart by briefly pressing the Reset button, the ETH0 interface is allocated
the configured IP address. If an IP address has not explicitly been configured the IP
address 192.168.0.1 is specified as standard.
When delivered from the factory ETH0 is configured in DHCP Automatic mode with the
IP address 192.168.0.1 You can force the DHCP into automatic mode by restoring the
default configuration, see 3.2 Generate the Default Configuration on page 10.
• It is recommended to use ETH0 in DHCP client mode. To do this, a DHCP server is
needed in the network. Ask your network administrator to reserve a fixed IP address
for the VoIP Gateway via DHCP. Tell the administrator the hardware address of the VoIP
Gateway, see chapter 2.7 The MAC Address on page 6. The ETH0 IP interface is usually
configured when the VoIP Gateway is commissioned and normally it does not need to
be changed.
• ETH1 port (Administration port) is set in fixed mode with the IP address 192.168.1.1
when delivered from the factory.
If you connect a PC to the ETH1 port, set the IP address of the PC permanently to
192.168.1.2.
Note: DHCP Automatic mode should not be used for ‘normal’ operation, since an
accidental restart switches the operating mode.
The VoIP Gateway's DHCP function has four operating modes:
DHCP Configuration Options
Besides the IP address actually assigned, the VoIP Gateway's DHCP client processes the
DHCP options specified in the table below, provided that they were supplied when the
DHCP lease was granted.
Mode Function Use
Disabled No DHCP function When you want to configure fixed IP
parameters.
Server
a
a.This setting is used primarily in tests or for demonstrations.
The VoIP Gateways do not incorpo-
rate complete DHCP servers.
DHCP server is activated Connected devices are assigned an IP address
by the VoIP Gateway.
Client DHCP client is activated The VoIP Gateway gets its IP configuration
from a DHCP server in the network, see DHCP
Configuration Options below.
Automatic
b
b.This setting is only used at the start. During commissioning it must be replaced by the setting
“Disabled” or “Client”.
The DHCP client is
activated after switching
on, and after a reset of a
fixed address.
ETH0 port is delivered in this condition (as also
after restoring the default configuration)