Components of the Network Model
4-3
8000-A2-GB21-20
November 1997
A maximally configured HotWire DSLAM system will have 18 DSL cards with
each DSL card having its four ports connected to a HotWire RTU for a total of
72 modem ports. Each modem can connect via a hub to 32 active end-user
systems to support a total of 2304 users.
NOTE:
The following illustration does not apply to the 5171 PC NIC and 5216 RTU.
The 5171 PC NIC and 5216 RTU are for single end-user system
configurations only.
DSL
Card
10BaseT
LAN
DSL/POTS
97-15463-01
.
.
.
End-user
System 1
NSP1
WAN
NSP2
NSP16
End-user
System 2
End-user
System 32
Router
or VLAN
Switch
HotWire
RTU*
10BaseT
.
.
.
* This RTU can be a 5170 RTU,
5246 RTU or 5446 RTU
Additionally, by setting up structured subnets behind each HotWire RTU,
hundreds of active end-user systems can be supported by each 5446 RTU
instead of 32. Careful network traffic analysis must be performed to determine if
very large networks will have acceptable response times. For information on how
to set up structured subnets, see Chapter 5,
IP Address Allocation
.
NOTE:
Usually a user is active only in one service domain at a time. However, if the
end user’s system can be multihomed, it may be possible to be active in
more than one NSP domain at a time. A multihomed system is a system
with connections to two or more logical networks, which may be assigned to
one or more physical networks.
