WaveRider LMS4000, User Manual

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3 Detailed Description
14 APCD-LM043-4.0
Network Access Point (NAP)
The NAP provides the Internet connection point for one or more CAPs. An LMS4000 system
can have more than one NAP. The number of NAPs depends on the geographical layout of
the LMS4000 system and the location of available Internet access points. A single NAP can
provide Internet connection for one CAP, or several CAPs, each either colocated with the NAP
or connected to the NAP over backhaul facilities.
Figure 6 LMS4000 System
The following sections discuss the operation of the LMS4000 900 MHz Radio Network, of
which the CCU and EUM are the key components.
3.2 Communications Access Point
3.2.1 Key Components
The following are key components of the Communication Access Point:
• CCU
• Cavity filters
• Lightning arrestors
NMS Station
Router
Internet
EUM
Backhaul (NCL1170,
for example)
To Other
CAPs
Network and
Equipment
Management
10/100BaseT
-Subscriber
Management
-Billing Data
- Authorization
- Registration
Layer 3
- Switching
- Routing
NAP
CAP
Routing to/from
Internet
EUM
- Authorization
- Registration
UPS
Radio Control
- Configuration
- Redundancy
CCU
CCU
Back-up CCU
CCU
Antenna
Antenna
Antenna
Cavity Filters
RFSM
Not part of
LMS4000
Switch
10BaseT
End-user PC
EUM End-user PC
EUM
End-user PC