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Оборудование / xDSL оборудование / SHDSL CT-520 router 2,3Mb
SHDSL CT-520 router 2,3Mb
 

Customer Premises Equipment

ITU-T G.991.2 (G.shdsl)

ITU-T G.991.2 (G.shdsl)
ITU-T G.991.2 (G.shdsl)

Applications Diagram

Applications Diagram
Applications Diagram

Description

The CT-320 SDSL modem and CT-520 SDSL router satisfy the needs of multiple users for small office/home office and remote office/branch office applications. They provide a symmetrical transmission speed up to 2.3 Mbps through SDSL connection over one ordinary telephone line. In addition, they support up to 16 virtual concurrent connections to multiple destinations. The CT-320 SDSL modem and CT-520 SDSL router can be used for variety of applications, in cluding video conferencing, remote training, e-commerce, and other multimedia applications. Easy configuration and monitoring can be accomplished by using browser. The CT-520 SDSL router has full routing capabilities to segment/route IP protocol and is capable of bridging other protocols. It can be also configured in either server or client mode providing a point-to-point connectivity between two LAN .

Features

  • Compact and high performance standalone units

  • Bridge function
  • G.shdsl
  • Auto-negotiation rate adaptation
  • AAL5 for ATM over SDSL
  • VBR / UBR / CBR ATM services
  • VC-based and LLC multiplexing
  • Up to 16 VCs
  • One Ethernet port for LAN connection
  • One console port for local management
  • Embedded SNMP agent
  • Web-based management
  • Configuration backup and restoration
  • OAM F4/F5
  • Static route/ RIP/RIP v2 routing function (CT-520only)
  • Dynamic IP assignment and Network Address Translation (CT-520 only)

Specifications

WAN Interface (One SDSL port)


SDSL standard

ITU-T G.991.2(G.shdsl)

Line rate

80K To 2320 Kbps

Data rate

N*64Kbps , N=1~36

ATM Attributes
PPP over AAL5RFC2364 (CT-520 only )
Multi-protocol over AAL5RFC-1483 Bridge

RFC-1483 Route (CT-520 only )
VCs16
AAL typeAAL5
ATM serviceclassUBR /CBR /VBR
ATM UNI supportUNI3.1 PVC
OAM F4/F5Yes
Management
Console portRS232/DB9
SNMPYes
TelnetYes
Web-based managementYes
Configuration backup and restorationYes
LED IndicatorsPower, Alert, LAN status, SDSL status
Local interface(One Ethernet port)
StandardIEEE 802.3 10Base-T
Transparent bridging and learningYes
Routing functions ( CT-520 only )
IP static routeYes
RIP and RIPv2Yes
Network functions (CT-520 only )
ARPYes
DNS, NAT/PAT, DHCP/BOOTPYes
PAP, CHAPYes
Power Supply
External power adapter110 VAC or 220 VAC
Dimension
Height x Width x Depth40mm x 200mm x 140mm

Note: Specifications are subject to change without notice.

ITU-T G.991.2 (G.shdsl)

ITU-T G.991.2 (G.shdsl)
ITU-T G.991.2 (G.shdsl)

This diagram shows the PSDs associated with G.shdsl
and SDSL-2B1Q at a 768kbps data rate. PSD is a representation of the energy associated with a signal across a band of frequencies. Likewise, it is indicative of the potential for interference with ADSL in its upstream and downstream directions. In the downstream direction there is little difference in the effect either technology may have on the transmitted ADSL signal. However, the downstream, or high bandwidth direction, of ADSL may be significantly affected by
SDSL-2B1Q and is affected very little by G.shds

G.shdsl vs. SDSL-2B1Q
G.shdsl vs. SDSL-2B1Q

Figure 4 depicts the 1% worst case performance
in a 49 disturber Self NEXT environment on 26AWG copper. In other words, performance is expected to be better than shown in 99% of the deployments. For a given rate, G.shdsl increases range by 15% to 20%. For a given range, G.shdsl increases rate performance by 35% to 45% over
SDSL-2B1Q.

G.shdsl Summary of Benefits

The G.shdsl Recommendation is a culmination of the knowledge gained from experience with earlier DSL technologies and the advances in DSP design. It is likely to become the most common solution for DSL deployment in nearly any symmetric application requiring bandwidths from 192kbps to 2.3Mbps for the following reasons:

  • Rate/range adaptability, providing access to subscribers beyond traditional limitations over a single copper pair.
  • Spectral compatibility with services co-existing in the same binder group or cable.
  • Interoperability in a multivendor environment to ensure numerous cost-effective, competitive network solutions.
  • Robust performance for ease of installation and predictable performance in noisy, real-world implementations.
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