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MW1122 Administrator Manual
E Copyright Nokia Networks Oy
C33902001SE_00
2-12
2.2.8 Point-to-Point Protocol over Ethernet (PPPoE)
Standard PPPoE mode is used when MW1122 is operating as a bridge.
PPPoE protocol defines how PPP sessions are mapped into Ethernet
packets. When MW1122 operates as a bridge, this protocol is
transparent to MW1122.
2.2.9 Payload encapsulations
Both routed and bridged protocols are encapsulated in the ATM link by
using either RFC 2684 LLC/SNAP encapsulation or VC multiplexing.
MW1122 also supports PPP over AAL5 encapsulation, in which
routed protocols are first encapsulated in PPP (RFC 1661). PPP is then
encapsulated in ATM according to the IETF PPP over AAL5 using
RFC 2364 VC multiplexing or LLC/NLPID encapsulation.
2.2.10 Access list authorisation
When a wireless LAN is used, it is important to be able to control the
clients accessing to MW1122. Therefore, MAC-address-based access
control may be used. It prevents all communications to a such client
whose MAC address does not appear on the access list. When a new
client is brought to the network, its MAC address needs to be added to
the access list. This can be done manually through the local command
line interface (CLI) or with a Web browser management.
2.2.11 Wireless LAN and radio interface
MW1122 supports wireless LAN to be used as one of the interfaces.
The wireless LAN utilises Nokia C110/C111 Wireless LAN PC card
which needs to be inserted to the designated PC Card slot on the back
panel of the modem. Only Nokia C110 or C111 Wireless LAN cards
can be used. Without a wireless LAN card, MW1122 operates as a
normal ADSL terminal with one 10Base-T Ethernet interface. The
wireless LAN card can be inserted to the PC Card slot while the
modem is operating and the wireless LAN connectivity will be
achieved without restarting the modem. Only the WLAN subsytem
must be reseted through the web interface or the command line
interface.
Wireless LAN used in MW1122 is based on IEEE802.11 standard
operating at 2.4 GHz radio band. The band has been divided into
subchannels which are dependent on local regulations. Typically, in
Europe, there are 13 and, in USA, 11 channels. The transmission