B-11
TM4400013
REV.
D
The netmask is used to divide the IP address differently from the standard defined by the classes A,B,C. By
entering a netmask, it is possible to define how many bits from the IP address are to be taken as the network
part and how many bits are to be taken as the host part.
Standard IP network netmask
Network bits
Host bits
Netmask
Class A
8
24
255.0.0.0
Class B
16
16
255.255.0.0
Class C
24
8
255.255.255.0
The number of host bits is entered; the Radio Clock then calculates the netmask. The netmask is displayed in
standard decimal-dot notation.
Netmask examples
Netmask
Host
255.255.255.252 2
255.255.255.248 3
255.255.255.240 4
255.255.255.224 5
255.255.255.192 6
255.255.255.128 7
255.255.255.0 8
255.255.254.0 9
255.255.252.0 10
255.255.248.0 11
. .
. .
255.128.0.0 23
255.0.0.0 24
If your network is not connected to the Internet and there are no plans to make such a connection, you may use
any IP address you wish.
However, if you are not connected to the Internet and have plans to connect to the Internet or you are connected
to the Internet and want to operate your Model 9100 on an Intranet you should use one of the sub-networks
below for your network. These network numbers have been reserved for such networks. If you have any
questions about IP assignment ask your Network Administrator.
Class A 10.x.x.x
Class B 172.16.x.x
Class C 192.168.0.x