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Chapter 15
Configuring ATM-over-SHDSL Interfaces
ATM-over-SHDSL Overview
ATM-over-SHDSL Overview on page 369
Configuring ATM Mode for SHDSL Overview on page 370
Configuring ATM Mode on the PIM on page 371
Configuring SHDSL Operating Mode on an ATM Physical Interface on page 372
Configuring Encapsulation on the ATM Physical Interface on page 372
Configuring Logical Interface Properties on page 373
Example: Configuring an ATM-over-SHDSL Interface on page 374
Verifying an ATM-over-SHDSL Interface Configuration on page 375
The symmetric high-speed digital subscriber line (SHDSL) Physical Interface Module
(PIM) is available for J Series Services Routers. The PIM supports multi-rate, high-speed,
symmetrical digital subscriber line technology for data transfer between a single
customer premises equipment (CPE) subscriber and a central office (CO). Unlike
ADSL, which was designed for delivering more bandwidth downstream than upstream,
SHDSL is symmetrical and delivers a bandwidth of 2.3 Mbps in both directions. The
SHDSL PIM has 2 ports and supports ATM-over-SHDSL mode only.
SHDSL is defined in the following specifications from the ITU and the Internet
Engineering Task Force (IETF):
ITU G.991.2, Single-pair High-speed Digital Subscriber Line (SHDSL) Transceiver
ITU G.994.1, Handshake Procedures for Digital Subscriber Line (DSL) Transceivers
ITU G.997.1, Physical Layer Management for Digital Subscriber Line (DSL)
Transceivers
RFC 3276, Definitions of Managed Objects for High Bit-Rate DSL - 2nd generation
(HDSL2) and Single-Pair High-Speed Digital Subscriber Line (SHDSL) Lines
J Series routers with SHDSL Annex A or Annex B PIMs act as a primary WAN link.
They use an ATM interface to send network traffic through a point-to-point connection
to a DSL-access multiplexer (DSLAM). You can configure Point-to-Point Protocol over
Ethernet (PPPoE) over ATM to connect through DSL lines. For more information
about configuring PPPoE, see "Configuring PPPoE" on page 830.
ATM-over-SHDSL interfaces are not supported on J2300 Services Routers.
ATM-over-SHDSL Overview
369
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