Configuring ATM-over-SHDSL Interfaces

Services Routers with G.SHDSL interfaces can use an Asynchronous Transfer Mode (ATM) interface to send network traffic through a point-to-point connection to a DSL access multiplexer (DSLAM).

Note: You can configure Services Routers with a G.SHDSL interface for connections through SHDSL only, not for direct ATM connections.

J-series Services Routers with a 2-port G.SHDSL interface installed support the following modes. You can configure only one mode on each interface.

• 2-port two-wire mode (Annex A or Annex B)—Supports autodetection of the line rate or fixed line rates and provides network speeds from 192 Kbps to 2.3 Mbps in 64-Kbps increments. Two-wire mode provides two separate, slower SHDSL interfaces.
• 1-port four-wire mode (Annex A or Annex B)—Supports fixed line rates only and provides network speeds from 384 Kbps to 4.6 Mbps in 128-Kbps increments, doubling the bandwidth. Four-wire mode provides a single, faster SHDSL interface.

To configure Point-to-Point Protocol (PPP), see the JUNOS Network Interfaces Configuration Guide.

You configure the underlying G.SHDSL interface as an ATM interface, with an interface name of at-pim/0/port. (For information about interface names, see Network Interface Naming.) Multiple encapsulation types are supported on both the physical and logical ATM-over-SHDSL interface.

This section contains the following topics:

• Configuring an ATM-over-SHDSL Interface with Quick Configuration
• Adding an ATM-over-SHDSL Interface with a Configuration Editor