The /30 means the subnet. A subnet mask of /30 = 255.255.255.252. So the IP addresses you can use are 10.14.6.1 and 10.14.6.2.
Have a look at this 3com PDF, which should help you understand the basics of IP addressing and subnetting.
The /30 subnet allows you 4 IP addresses in the range 10.14.6.1 - 10.14.6.4, your usable ip addresses are the .2 and .3 addresses, where 10.14.6.1 is your network address and 10.14.6.4 will be your broadcast address.