Dedicated Micros D4 Anleitung Seite 21

MTU sizes can vary for each connection and it may be necessary to use trial
and error to find the optimal MTU, if you are unsure about the MTU size, use
the default setting (576) and work up if necessary. Suggested MTU sizes are
as follows, Dedicated Micros recommend you obtain this information from your
Internet Service Provider who will provide you with the optimal figure.
Network Connection
PPP (PSTN Modems, ISDN/PSTN routers
Ethernet
PPPoE (PPP over Ethernet, DSL, Cable)
PPPoA (PPP over ATM, DSL)
VPN
WARNING: Changing the MTU size can have an adverse affect on the
transmission speed and operation over the network. Check with your network
administrator or service provider for advice on the correct MTU size for the
network.
Network
This option is used to enable or disable the network option. The network is
enabled by default.
Bandwidth Limit
The bandwidth used by the D4 can be limited to prevent overloading on slower
networks. The D4 has a 10 Mbs connection (10Base-T).
The maximum bandwidth that a D4 will use (5 users viewing images) is 6 Mbs
so any limiting over 60% does not affect the bandwidth used by the D4. The
maximum bandwidth used by one user is approximately 2.5 Mbs. If you want to
limit the bandwidth used by the D4 to 1 Mbs set the bandwidth limit to 10%.
Note: Restricting the bandwidth does not decrease the image quality, but the
update rate of the images over the network will decrease.
TCP/IP Address, Subnet Mask, Default Gateway
A unique IP address and a subnet mask must be given to the D4 in order to
communicate with it over a network. On an existing network these are often
obtained from the Network Administrator. A Default gateway will be required if
MTU Size the D4 is going to be viewed from a remote location, such as a WAN
connection or dial-up via a router.
576 (default)
Note: The D4 requires a Static IP address, even if it is connected to a dynamic
1500
(DHCP) network.
1458
PPP Port
1458
Serial port 1 can be used for PPP connection using a US Robotics modem.
This option allows you to identify that the serial port has a serial modem
1350
connected. Be aware that the PPP port is off by default and will need to be
enabled if a modem is connected.
Modem Initialise
This text string will be transmitted from the D4 to the modem on a regular
interval to ensure communication is still present. It is also the string that would
be used for 'dial in' for the PPP function.
PPP Address
The PPP (Point to Point Protocol) address is used when a Hayes compatible
modem is connected to the D4. The PPP address must be entered into the
Network Viewing software or Web browser to view images when connected to
the D4.
By default, the PPP address is 172.017.002.002 when the TCP/IP address is at
its default setting of 000.000.000.000. The PPP address cannot be changed
directly, but is changed automatically when the TCP/IP address is adjusted.
19