Black Box mm146, User Manual

Page: 77 / 85

75
APPENDIX A
Supported IP Networks and
Operation
This Appendix discusses the typical network configuration that is supported and
explains how the videophone operates on a LAN and over the Internet. This section
will touch on many concepts of both Ethernet and IP based networks. A basic
knowledge of these concepts is highly recommended as they are beyond the scope of
this User Guide.
Basic Operation
mm146 and mm156 models allow for up to 384kbps of IP based video over 10 or 100
Mbps UTP Ethernet connections. This allows the use of existing networks and
Internet connections to supply high quality video transmission without the long
distance expense of a regular ISDN call.
Basic Network Configuration
The videophone supports a 10 or 100 Base-T connection over IP based networks
using static and dynamic (DHCP) settings for IP address and subnet mask. This
allows users to make calls on a local network from one IP address to another. There is
support for a default gateway, IP port mapping and/or port forwarding. This concept
is discussed below in the Internet Connectivity section. Using the same local area
network (LAN) is the easiest way to configure two IP videophone systems (plug both
systems into a 10Mbps network hub/switch).
Give both systems a unique IP address and the same subnet mask:
• Box A IP address = 10.1.20.1, subnet mask= 255.255.0.0
• Box B IP address = 10.1.20.2, subnet mask= 255.255.0.0