User`s guide

Introduction to the HotWire DSLAM
1-5
8000-A2-GB21-10
June 1997
What is the HotWire 5446 RTU?
The HotWire 5446 RTU resides at the customer premises and is composed of a
DSL modem and an IP forwarder. The RTU connects to the local loop to provide
high-speed connectivity to the HotWire DSLAM up to distances of 18,000 feet.
You can connect the HotWire 5446 RTU directly to an end-user system or to
multiple end-user systems via an Ethernet (10BaseT) hub. In addition, the RTU
and telephone can function simultaneously over the same pair of copper wires at
the customer premises when a POTS splitter is used at both ends of the local
loop. The POTS splitter filters out the DSL signal and allows the POTS
frequencies to pass through.
The following illustration shows the HotWire 5446 RTU with its 10BaseT interface
connected directly to an end-user system (typically a PC or workstation with a
Local Area Network (LAN) card).
POTS/DSL
POTS
NID
From Network
Access Provider
POTS
Splitter
(optional)
RTU
NID = Network Interface Device
POTS
DSL
97-1545
5
10BaseT
End-user
System
The following illustration shows a HotWire 5446 RTU with its10BaseT hub
connected to multiple end-user systems (each HotWire 5446 RTU can support up
to four customer domains and up to 32 users). The other port of the HotWire
5446 RTU is a DSL interface connected to the HotWire DSLAM (over twisted-pair
wiring). The POTS Splitter facilitates simultaneous voice and data transfer over a
phone line.