Introduction to the HotWire DSLAM
1-2
8000-A2-GB21-20
November 1997
The following illustration shows a high-level view of a HotWire configuration:
NOTE:
The cable connection from a DSL card to a Main Distribution Frame (MDF)
can either be a direct connection to the MDF or a connection through a POTS
splitter to an MDF, but not both. Refer to the appropriate HotWire DSLAM
Installation Guide for more information.
Legend: DSL - Digital Subscriber Line
RTU - Remote Termination Unit
MDF - Main Distribution Frame
POTS - Plain Old Telephone Service
IPC - Interworking Packet Concentrator
*
Optional
DSL
CARD
DSLAM
Central Office (CO)
97-15674-01
Customer Premises (CP)
CO
Switch
Ethernet
RTU
*CP
POTS
Splitter
*CO
POTS
Splitter
MDF
POTS/DSL
HotWire
8200
IPC
Voice
Interface
Data
Interface
POTS
Network
Service
Provider
The HotWire DSLAM can be configured to work with multiple types of RTUs
installed at the customer end of the local telephone loop. RTUs terminate the
DSL line and allow users at remote locations to access Network Service
Providers (NSPs) or corporate networks by means of the DSL phone line.
When using an 8540 DSL card in the DSLAM, the DSLAM can be configured to
interoperate with any one of the following RADSL RTUs on each of its four DSL
ports:
5170 RTU — Operates at speeds up to 7 Mbps with a simple bridge that
supports up to 32 end-user systems.
5171 Remote PC Network Interface Card (NIC) — Operates at speeds up to
2.5 Mbps supporting a single user’s PC.
5216 RTU — Operates at speeds up to 1.28 Mbps supporting a single user.
5246 RTU — Operates at speeds up to 2.5 Mbps with a transparent learning
bridge that supports up to 32 end-user systems.
