About The Dd Mode - Icom IC-905 Advanced Manual

13
DD MODE OPERATION

About the DD mode

1200 MHz and higher bands
• Data communication at 128 kbps
Data
PC
• Data can be sent through an Internet connection to
another station or through another repeater
Data
Repeater
PC
Browsing web sites
PC
While in the DD mode and "TX INHIBIT"
(Transmission inhibit) is set to "OFF," data is
automatically transmitted when it is input from a PC�
The received data is output to the PC�
L You can change the data output setting�
» SET > DV/DD Set > DD Packet Output
PRECAUTION:
• While "TX INHIBIT" is OFF, files in the shared folder
may be modified or deleted, or unknown file(s) may be
copied into the folder by another station�
• Icom assumes no responsibility whatever for any
damages or lost profits resulting from opportunities for
signal communications being lost because of the failure,
malfunction, poor condition, damage, or data loss of
this unit or because of such external causes as power
failure�
Icom also dismisses all responsibility for demands made
by a third party�
• Since the transmitted data is not encrypted, it can be
received and detected by other stations�
• Connect the IC-905 and PC using an Ethernet cable
for Data mode operation before starting DD mode
operation� (p� 13-3)
• Disconnecting the PC from any other network, ISP, LAN,
and so on, is recommended� A network error may occur�
• For data transferring (PC-to-PC communication), a
static IP address must be set, and a folder is shared in
the same workgroup between both PCs�
• You cannot use the NTP Server function and DV Gate
way function while operating in the DD mode�
Management
Server
INTERNET INTERNET
Repeater
Management
Server
INTERNET INTERNET
Repeater
Setting your PC
To operate in the DD mode, you need a network
environment Local Area Network (LAN)�
L Communication in the DD mode is peer-to-peer�
L Depending on your operating purposes, you may need
to change a firewall setting, such as to allow pings, file
sharing, or the FTP service� Ask your PC's manufacturer
about the setting details�
L After finishing DD mode operation, restore the firewall
setting for security, when you use your PC to access the
PC
Internet�
Step 1. Obtaining the static IP address
Set a static IP address to your PC�
L Note the current IP address before you change it�
Communication without a repeater
L DO NOT set the same IP address between PCs�
L To prevent the transceiver from unnecessarily
PC
transmitting, we recommend connecting your PC and
transceiver by using a wired LAN Adapter that is separate
from the Internet connection�
Example:
LAN1
LAN2
PC
IP address:
192�168�0�100
Subnet mask:
255�255�255�0
Communication using a repeater
Set the IP address, subnet mask, and the repeater's
gateway address that is specified by the repeater
administrator�
Example:
PC
IP address:
***�***�***�***
Subnet mask:
255�0�0�0
Default gateway:
10�0�0�9
13-2
Server
INTERNET INTERNET
Repeater Repeater
Gateway IP address:
10�0�0�9
LAN1
LAN2
PC
IP address:
192�168�0�101
Subnet mask:
255�255�255�0
PC