MP-20x Telephone Adapter 230 Document #: LTRT-50609
User's Manual
The result of the last performed check is displayed between the Check Now and
Force Upgrade buttons, indicating whether a new version is available or not.
3. If a new version is available:
a. Click the Force Upgrade button. A download process begins. When downloading
is complete, a confirmation screen appears, asking you if you want to upgrade to
the new version.
b. Click OK to confirm. The upgrade process begins and should take no longer than
one minute to complete. At the conclusion of the upgrade process, MP-20x
automatically reboots and the new software version runs.
4. If a new version is unavailable:
a. Click the Check Now button to perform an immediate check (instead of waiting
for the next scheduled one). The screen displays a green "Check in progress..."
message.
b. Click the Refresh button until the check is completed and the result is displayed.
14.7 IP Address Distribution
Your MP-20x's Dynamic Host Configuration Protocol (DHCP) server makes it possible to
easily add computers that are configured as DHCP clients to the home network. It provides
a mechanism for allocating IP addresses and delivering network configuration parameters
to such hosts. MP-20x's default DHCP server is the LAN bridge.
A client (host) sends out a broadcast message on the LAN requesting an IP address for
itself. The DHCP server then checks its list of available addresses and leases a local IP
address to the host for a specific period of time and simultaneously designates this IP
address as `taken'. At this point, the host is configured with an IP address for the duration
of the lease.
The host can choose to renew an expiring lease or let it expire. If it chooses to renew a
lease then it also receives current information about network services, as it did with the
original lease, allowing it to update its network configurations to reject any changes that
may have occurred since it first connected to the network. If the host wishes to terminate a
lease before its expiration it can send a release message to the DHCP server, which then
makes the IP address available for use by others.
Your MP-20x's DHCP server:
Displays a list of all DHCP host devices connected to MP-20x
Defines the range of IP addresses that can be allocated in the LAN
Defines the length of time for which dynamic IP addresses are allocated
Provides the above configurations for each LAN device and can be configured and
enabled/disabled separately for each LAN device
Can assign a static lease to a LAN PC so that it receives the same IP address each
time it connects to the network, even if this IP address is within the range of addresses
that the DHCP server may assign to other computers
Provides the DNS server with the host name and IP address of each PC that is
connected to the LAN
Additionally, MP-20x can act as a DHCP relay, escalating DHCP responsibilities to a WAN
DHCP server. In this case, MP-20x acts merely as a router, while its LAN hosts receives
their IP addresses from a DHCP server on the WAN.
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