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im Vertrieb von
Gateways
Local and remote devices
IP addresses and subfields
Subnet masks and subfields
www.camboard.de
CAMBOARD Electronics
A gateway is a computer that provides a link between different subnets.
The e-mail server that the Matrix 12800 uses for e-mail notification can
communicate with the e-mail server directly (on the same subnet) or be routed via a
gateway.
In order for the FPC 5000 and the Matrix 12800 BME to communicate using TCP/IP
protocol, these devices must be on the same subnet and communicate directly,
without going through a gateway.
The local and remote devices are defined from the point of view of the function
being described. In this manual there is only one area in which subnetting is
described: setting TCP/IP and e-mail values in the Matrix 12800 BME 0 (see
Ethernet protocol settings in chapter 3, Virtualization/Control Program), in which case
the Matrix 12800 is the local device and the e-mail server is the remote device.
Valid IP addresses consist of four 1-, 2-, or 3-digit numeric subfields separated by
dots (periods) (figure A-2). Each subfield can be numbered from 000 through 255.
Leading zeroes, up to 3 digits total per subfield, are optional. Values of 256 and
above are invalid.
Typical IP Address:
192.168.254.254
Subfields
Figure A-2 — IP address and subfields
The subnet mask field (figure A-3) is used to determine whether the local and
remote devices are on the same subnet or different subnets. The subnet mask
consists of four numeric subfields separated by dots. Each subfield can be
numbered from 000 through 255. Leading zeroes, up to 3 digits total per subfield,
are optional. Each subfield typically contains either 255 or 0. The subfields
determine whether or not the same subfields of two IP addresses will be compared
when determining if two devices are on the same subnet.
255 indicates that this subfield will be
compared between two IP addresses.
Typical Subnet Mask:
255.255.0.0
Figure A-3 — Subnet mask and subfields
Tel. 07131 911201
Matrix 12800 Switchers • Ethernet Connection
Fax 07131 911203
0 indicates that this subfield will not be
compared between two IP addresses.
Subfields
ce-info@camboard.de
A-3
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