Alcatel Carrier Internetworking Solutions 1000 ADSL Network Connections, Virtual Connections

NETWORK CONNECTIONS

The Alcatel 1000 ADSL high speed modem supports two methods for accessing remote sites like corporate networks or the World Wide Web via a local ISP. The two methods are direct networking and dial-upnetworking.

Direct networking describes a connection that is always active. In other words, no preliminary steps are required to obtain a connection. Once service is enabled, the user switches on the PC and the modem, and connects to the remote site (the ISP or corporate network).

Dial-up networking describes a procedure in which the user requests a connection by dialing the network. The remote site requires a personal user account and password before access is allowed.

If your modem has an ATMF-25 port, it supports both direct and dial-up networking methods. Applications on your PC determine which method you are using.

If your modem has a 10BASE-T port, the networking method depends on the Ethernet protocol you are using:

∙Direct networking is supported by an IEEE 802.1D Transparent Databridge in the modem. You configure your local workstations with the appropriate parameters or allow your workstations to automatically assume the parameters from the network via specialized protocols.

∙Dial-up networking relies on the standard Point-to-Point Protocol (PPP) and local tunneling using the industry Point-to-Point Tunneling Protocol (PPTP).

To determine which networking method you must use, contact your local ISP or your corporate network administrator.

Note:

Only typical networking solutions are presented here, although various combinations of available protocols and equipment allow numerous architectures and networking solutions.

Virtual Connections

The ADSL modem uses ATM as a transport protocol. ATM is a connection- oriented packet-switching technology using fixed-size packets (called cells) to carry traffic through a public or private network.

ATM connections, typically referred to as virtual connections, are identified by two values called a Virtual Path Identifier (VPI) and a Virtual Channel Identifier (VCI). A particular VPI/VCI combination identifies a virtual connection between two