Cisco Cisco 1800 2800 3800 8-Wire Symmetric High-Speed DSL (G.SHDSL) WIC Data Sheet

Data Sheet

Page 1 of 8

Cisco Symmetric High-Bitrate DSL High Speed WAN
Interface Cards for Cisco Integrated Services Routers

Cisco

Integrated Services Routers offer a wide variety of WAN connectivity modules to

accommodate the range of application needs in customer networks. The Cisco 2- and

4-Pair Symmetric High-Bit-Rate DSL High-Speed WAN Interface Cards offer G.SHDSL

based WAN connectivity for modular routers deployed in small to medium-sized

businesses and enterprise branch offices.

Overview

The 2-pair (HWIC-2SHDSL) and 4-pair (HWIC-4SHDSL) symmetric high-bit-rate DSL high-speed

WAN interface cards (HWICs) provide G.SHDSL connectivity to a Wide Area Network (Figures 1

and 2). The 4-pair symmetric G.SHDSL HWIC provides two ports of 4-wire or four ports of 2-wire

connectivity options, whereas the 2-pair G.SHDSL HWIC provides two ports of 2-wire or one port

of 4-wire connectivity options. The 4-pair symmetric G.SHDSL HWIC also allows bonding single or

dual-pair G.SHDSL ports up to a single 8-wire interface with increased bandwidth by using Inverse

Multiplexing over ATM (IMA) or data interleaving with M-pair mode. These cards are supported in

all integrated services routers that have HWIC slots.

The 2-pair and 4-pair G.SHDSL HWICs supersede the existing G.SHDSL WAN Interface Card

(part number WIC-1SHDSL-V3), which is a WIC-based G.SHDSL solution. The two new G.SHDSL

HWICs provide higher performance and increased reach when compared to the G.SHDSL WIC.

Table 1 compares the three interface cards.

G.SHDSL technology offers customers high-speed, symmetrical WAN connectivity at a lower

monthly cost than traditional WAN circuits. The 2- and 4-pair G.SHDSL HWICs together with Cisco

integrated services routers provide businesses the necessary bandwidth for critical traffic such as

voice and video conferencing, and enable customers to save money by integrating voice and data

traffic on the same WAN link. Service providers can increase subscriber revenue by bundling

services and offering differentiated service levels through service-level agreements.

The first standardized multirate symmetric DSL, G.SHDSL has been an accepted worldwide

technology standard based on ITU recommendation G.991.2. G.SHDSL is designed to transport

rate-adaptive symmetrical data across a single copper pair at data rates up to 2.304 Mbps for a

single pair or up to 4.608 Mbps over two pairs. Later enhancements (Annexes F and G) to the

G.991.2 specification allow for increased performance up to 5.696 Mbps over a single copper pair.

IMA technology allows the 4-pair G.SHDSL HWIC to offer data rates up to 2.304 Mbps per pair

and up to 9.2 Mbps over four pairs. These rates cover applications traditionally served by HDSL,

SDSL, T1, E1, and services beyond E1. Refer to Table 2 for the data rates supported by the 2- and

4-pair G.SHDSL HWICs (HWIC-2SHDSL and HWIC-4SHDSL) under different configurations.

Figure 1. Cisco 2-Pair G.SHDSL HWIC (HWIC-2SHDSL)