CTI Products RCD Advanced Client-Server - Manual (Page 167)

Glossary
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Module Equivalent to the Node portion of the network address, less one. Valid values are
from 00 to 7E (hexadecimal) for MCN modules.
Multicast An IP protocol that sends a single IP packet to a number of IP units at the same time.
All receiving devices must be members of a Class D IP Multicast Group
(224.x.x.x – 239.x.x.x) IP Multicast protocol is used between the MCN Server and
the Clients.
NIC Network Interface Card – Interface card between the PC and the Ethernet network.
PBX Private Branch Exchange (In-house telephone system switch)
PCLTA Internal MCN Network Interface for PC
Port (IP) A number indicating a logical connection within an IP device. Ports allow multiple
types of messages (email, HTTP, FTP, etc.) to be sent to the same IP address. The
IP device decides what to do with each message depending on which port it is
addressed to.
PSTN Public Switched Telephone Network (Dial-Up phone system)
RCD Remote Comparator Display
Subnet Mask The bits that define the Subnet range. A portion of the IP Address Bits (normally
the upper bits) are used to define the subnet range. The subnet mask identifies the
“NetID” and “HostID” portions of the IP address in a bitwise fashion. The mask is
constructed by placing a “1” in any bit that is part of a subnet (NetID) address. So
subnet mask bits that are SET define the NetID, and CLEARED subnet mask bits
define the HostID.
A subnet mask of 255.255.255.0 defines the NetID as the first three octets, and the
HostID as the last octet. For example, for the address 192.47.73.111 and the subnet
mask of 255.255.255.0, the subnet can be identified as 192.47.73.0.