User's Manual

1 Introduction
2 APCD-LM043-4.0
channel. Even with large numbers of subscribers, end users generally perceive that
they have the entire channel to themselves.
• Grade of Service Support: The Polling MAC supports up to four end-user grades of
service, which allows the system operator to segment service offerings for those users
that demand and are willing to pay for higher grades of service, and those that are
only willing to pay for a more basic grade of service.
• License-free Radio Bands: The main advantage of using the ISM band is that you
need not apply to the FCC or Industry Canada for an operating license. This freedom
reduces your time to market and the effort and high cost associated with obtaining a
license.
• Robust Hardware and Software: LMS4000 hardware and software have been
rigorously tested in lab and field environments. The hardware, which is mechanically
robust, works over a broad range of temperatures and operating conditions. The
software is equally robust and has been designed to recover automatically from
unplanned events and abnormal operating conditions.
• Simple End-user Modem Configuration: The end-user modem is very easy to
configure. Normally, operators pre-configure the EUM prior to field deployment, so
they can maintain control over their network.
• Simple End-user Modem Installation and Operation: It is very easy to install and
operate the EUM. So easy, in fact, that when the installation is based on the
WaveRider indoor diversity antenna, the end user should be able to install and
operate the modem with no involvement from the network operator. This simplicity
saves the network operator the cost and inconvenience of having to visit the end-
user’s premises. The EUM uses a standard Ethernet interface which means the EUM
and the antenna can be located up to 100m from the end-user’s PC.
• Flexible Network Topology: The LMS4000 900MHz Radio Network has a flexible
topology, allowing it to line up with the operator’s existing Internet points of presence
and site facilities. As well, LMS4000 supports the following connections:
• Connection between the end-user modem and the Internet through the
network operator’s gateway router
• Direct connection between end-user modems through the LMS4000 900MHz
channel units (CCUs), if the CCU is configured to support this routing
• Connection between end-user modems on different, but colocated, CCUs if
these routes are configured in the CCU routing tables
• DHCP Relay: CCUs support DHCP relay, which, once enabled, allows end-user PCs
to automatically obtain their IP and DNS server addresses from the network operator’s
DHCP servers. DHCP relay simplifies the EUM installation even further and makes it
even easier for the modem to be installed by the end user.
• End-user Registration: All end user modems automatically transmit a registration
request to the LMS4000 system so they can access the wireless network. They can
only register if the network operator has authorized them in the CCU. This registration
guarantees that only approved subscribers can gain access to LMS4000 wireless
services.
• Remote System Configuration and Diagnostics: The network operator can
configure and monitor CCUs and EUMs from anywhere. This remote access allows
the operator to make configuration changes, download new features, and diagnose
problems remotely without having to visit distant network sites or end-user premises.