External Connections; Ethernet Addresses - MCi iControl User Manual

System Options

External Connections

As indicated in the LAN hub connection illustration, the elevator group may be connected to
larger area networks in the building or, through T1, DSL, or dial-up modems, to remote sites via
phone lines or the Internet. These kinds of connections are necessary if remote iView or iMon-
itor access is required.
Unless you are familiar with the technology, you will probably want to contact a networking
specialist or consultant to help. When connecting outside the local elevator group, the installa-
tion is exposed to attempted access by unauthorized personnel. There are several different secu-
rity measures that can be implemented to protect the elevator network. Additionally, if you
connect the iCue LAN hub network to another Local Area Network or to the internet, you may
need to change the factory-default IP addresses for the LAN connections.

Ethernet Addresses

Ethernet (TCP/IP) addresses are assigned to each device communicating on a network. Very
generally, each address is a set of four, number groups separated by decimal points/periods (.).
For example, 192.168.192.20. In order to see one another on a common network, the first three
digits need to match for each device (192 in our example). In order to be able to tell one device
from another, the last three digits need to be different. In our example, 20, so a second device
would have to be any value between 1 and 254 EXCEPT 20 (already in use).
If Ethernet addresses are not properly set, the iControls and iCue will not be able to communi-
cate. The addresses are set and tested at the factory before the system is shipped and should not
need to be changed unless you are making external connections or adding new equipment.
Please refer to "TCP/IP Reference" on page 5-15
5-14 Manual # 42-02-2222
for additional information.