Revision 1.3a
Page 2
SECTION ONE
XLR 500 OVERVIEW
1.1.
XLR as a LAN Bridge
The XLR 550 enables LAN segments to simply connect to each other at Layer 2 over 2, 4 or 8 copper
wires, with data rates up to 5.7Mbps per pair. Thus, all kinds of protocols (TCP/IP, IPv6, IPX, NETBEUI
etc) which use Ethernet Frame can be passed over the link as well as passing various tagged VLAN
frames in each direction. The diagram below shows a simple example of the XLR being used to provide a
LAN extension
1.2.
XLR 500 Used as part of an access system
The XLR 550 may also be used in conjunction with the Case XLR 5000 Cardframe, which can act as a
concentration point, providing 10/100/1000 Mbps back hauls to.
1.3.
Description of the XLR 500
The XLR 500, 2BASE-TL EFM EDD (Ethernet Demarcation Device), extends the reach of
Ethernet services to sites with no access to fibre, using bonded copper pairs. Designed using
standards-based EFM technology (2BASE-TL), the XLR 500 series cost-effectively allows
service providers and enterprises to deliver Ethernet services with symmetrical bandwidth at
rates up to 22.8 Mbps.