Alcatel Carrier Internetworking Solutions SpeedTouch Speed Touch Home Asymmetric Digital Subscriber Line (ADSL) Modem - Manual (Page 14)

2 Speed Touch Home Tour
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3EC 17058 AAAA TCZZA Ed. 02
2.4 Packet Services
2.4.1 IEEE 802.1D Transparent Bridging
The Speed Touch  Home Transparent Bridging packet service offers
complete protocol transparency and has inherent configuration
simplicity. Yet it provides excellent forwarding performance.
2.4.2 PPPoAĆtoĆPPTP Relaying
In contrast to Bridging, PPPoAĆtoĆPPTP Relaying supports a session
concept. It offers identification, authentication and encryption.
Similar to Bridging, PPPoAĆtoĆPPTP Relaying is multiprotocol and
offers complete Transmission Control Protocol (TCP)/Internet
Protocol (IP) transparency.
2.4.3 ATM
The STHome ADSL modem relies on ATM technology for its wide
area communications.
On top of ADSL, both Bridging and PPPoAĆtoĆPPTP Relaying use ATM
Virtual Channels (VCs). Virtual Path Identifier (VPI)/Virtual
Channel Identifier (VCI) are 2 numbers that together uniquely
identify the Virtual Channel (VC) and Virtual Path (VP) which will be
used by the STHome to access the remote end of the network
The remote organization, i.e. ADSL provider, Internet Service
Provider (ISP), or corporate has to provide following information
about the ATM layer:
"
The type of packet service, i.e. Bridged, or PPP/PPTP, on which
your ADSL service is enabled at the remote end of the connection
"
The ATM/ATM Adaption Layer (AAL)5 encapsulation method for
the Protocol Data Unit (PDU), i.e. LLC SNAP, or VC MUX, per
packet service
"
The VPI/VCI values per packet service.
Additionally, the remote organization may provide you with:
"
A User Account, i.e. User Name and Password, for Internet
access via an ISP or corporate location access.
Additional User Accounts might be required for access to specific
secured servers.
Note In the event STHome default settings differ with the provided
information, change the settings accordingly.