User's Manual Part 1

3: Detailed Description
APCD-LM043-8.0 (DRAFT C) 31
3. On EUM deregistration, the RADIUS server sends an “Account Request – Stop”
message with the final counts.
4. The RADIUS server sends an Accounting Response message to acknowledge any of
the three Accounting Requests.
3.4 LMS4000 Protocol Stacks
The LMS4000 900 MHz Radio Network is an IP (layer 3 for Routed mode; layer 2 for Switched
Ethernet and Through Only modes) network that provides connectivity from the end-user’s
computer to the Internet.
Figure 18 and Figure 19 show the protocol stacks through which an IP packet traverses as it
travels between the end-user’s computer, shown on the left, and the Internet, shown on the
right
Figure 18 Routed Mode
Gatew ay
Router
10BaseT
Ethernet MAC
IP
TCP/UDP
Applications
(email,
brow ser, ftp,
telnet, ICQ,
VoIP, ...)
1
2
3
4
5 - 7
OSI
Layer
En d - Us e r ' s
Computer
10BaseT
Et h e r n e t
MA C
IP Port Filtering
EUM3000
PMAC
DSSS
Rad io
10BaseT
Ethernet
MA C
IP Port Filtering
CCU3000
DSSS
Rad io
Backhaul
Inte rnet
Connection
Auth/Reg
PMA C
Auth/Reg
Ethernet Bridging
IP Routing
TCP/ UDP/ I P
TCP/UDP
EUM Application
CCU Application
Et h e r n e t
Sw itch
DHCP
Relay
Radio Subnet Ethernet Subnet