ORTEC DSPEC 50, Руководство пользователя по оборудованию

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APPENDIX A. STATIC IP ADDRESSING
A.1. Preliminary Notes on IP Addresses and Subnet Masks
All devices (computers, DSPEC 50s, printers, etc) on a network must have a unique TCP/IP
address (IP address). If the same address is assigned to multiple devices, communication errors
will occur. IP version 4 addresses are formatted as four bytes (four sections, each containing a
number between 0 and 255) separated by a decimal point (
. ).
The other setting necessary for network communication is the
subnet mask
, which is formatted
the same as the IP address. The subnet mask defines which devices can communicate with each
other on the network. In order to communicate, two devices must have identical IP addresses in
the bits defined by the subnet mask. As an example, assume the following devices are on the
network:
Device IP Address Subnet Mask
Computer 10.7.3.3 255.255.0.0
Printer 10.8.3.3 255.255.0.0
DSPEC 50 10.7.3.4 255.255.0.0
All IP addresses on the list are unique; this is the minimum requirement for successful communi-
cation. However, we must also examine the subnet mask setting.
In the subnet mask 255.255.0.0, the first two bytes (sections) have all the bits set. This means
that, in order for two devices to communicate with each other, the first two bytes of their IP
addresses must match.
Note that the first two bytes (sections) in the computer and DSPEC 50 IP addresses match.
However, the printer’s second byte is different. As a result, the computer and the DSPEC 50 can
communicate, but the printer cannot.
A.2. Assigning Static IP Addresses
1. Power on the first of your DSPEC 50s, open the Communication Control screen, then do the
following:
— Tap Defaults to retrieve the factory default IP address and subnet mask.
— Tap Use the following IP address .
The resulting Communication Control screen will resemble Fig. 51.
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