User Manual

Section 3: Appendixes
Creating a Virtual Wire
LONWORKS networks that do not connect to an IP network may be quite large. A
L
ONWORKS network may contain 255 subnets each containing as many as 127 devices.
Subnets are linked together using L
ONWORKS routers. A common implementation is to
have many FT subnets connected to a single TP-1250 “high speed” backbone.
TP-1250 High Speed Backbone
FT-10
Channel
FT/TP-1250
Router
Figure 43. Connecting Devices on a Network
The high-speed backbone is a physical wire and, since all TP-1250 to FT routers are
connected to the same physical wire, communication proceeds unimpeded.
84 Using NAT, DNS, DHCP & DDNS with a L
ONWORKS Network