Furuno ETR-30N Operator's Manual page 31

Note: The same IP address cannot be used when installing two ETR-30N or ETR-6/10N. To
change IP address and host name, set a different number (1-9) for each network
sounder with the HOST NAME switch on the ETR-30N. Note however that the
ETR-6/10N's host name and IP address are "SOUNDER" and "172.31.92.1,"
respectively, and they cannot be changed.
HOST NAME control setting and resulting host name and IP address
HOST NAME
Control Setting
0 (Default Setting)
NET KP
If installing two ETR-30Ns, connect cable MJ-A7SPF0002-050 between NET KP OUT/IN
ports to prevent interference. Maximum two ETR-30N units may be installed; however,
there are two ports. One is for future use.
Host Name
SOUNDER
1 SOUNDER1
2 SOUNDER2
3 SOUNDER3
4 SOUNDER4
5 SOUNDER5
6 SOUNDER6
7 SOUNDER7
8 SOUNDER8
9 SOUNDER9
13
IP Address
172.31.92.1
172.31.92.11
172.31.92.12
172.31.92.13
172.31.92.14
172.31.92.15
172.31.92.16
172.31.92.17
172.31.92.18
172.31.92.19