Before we review the applications, we’ll do a quick a survey of RAD’s key SHDSL products. The ASMi-52 and ASMi-52L are dedicated managed SHDSL modems. The S-PRT is an SHDSL repeater, while the PDF-4 is an SHDSL power feeding hub. The LRS-24 is a flexible modem rack for copper and fiber access while the LRS-52 is a dedicated SHDSL central site modem rack with SNMP management. RAD’s DXC digital cross connect provides aggregation and grooming of DSL timeslots for transport over PDH and SDH/SONET networks. Together these products provide a complete solution for any SHDSL application.

Market segments that use SHDSL products include:

• Municipalities and utilities

• Corporate market

• Cellular market - mobile carriers

• System integrators

The first market segment that we will examine is the Utility Market.

What are some of the common features of applications in the utility market? To being with the topology is typically point-to-point, especially in the electric power industry.

• Most utilities will need to transmit multiple services over a single line.

• Utilities tend to own their own SHDSL infrastructure rather than leased lines.

• Transmissions tend to be longer than 10,000 feet.

• Utilities are cost conscious.

• Another common requirement is the need for communications equipment to be able to operate and withstand temperatures extremes, from -20° to +70° C.

Lastly many utilities have SCADA equipped sensors and therefore require dry contacts. The ASMi-52 supports dry contact applications.

RAD’s ASMi-52 SHDSL modem has several features that make the device particularly suitable for the utility market.

First, the ASMi-52 chassis comes in three options:

• Metal box: This standalone unit is half 19”and is specified for extreme temperatures.

• Rail mount box: The rail mount box is designed for easy installation in standard cabinet rail mounts. It also comes with extra Ethernet ports to interface with the growing numbers of SCADA devices equipped with Ethernet ports.

• Plastic casing: This casing further reduces the cost of the unit for office applications.

Lastly all ASMi-52 SHDSL modem model support repeaters, allowing for transmission over longer distances

 SHDSL technology is also appropriate for the transportation market. Common requirements include:

• Connecting displays and closed circuit TV cameras in railway stations for surveillance and security

•  Reducing the costs involved in connecting multiple remote locations and covering long distances in daisy chain network topologies

•  Any communications device installed alongside highways or railway tracks must meet a very specific EMC standard. In the next slide how the ASMi-52 complies with this specific standard and meets other special requirements of this market.

 How does the ASMi-52 meet the requirements found in the transportation market?

The ASMi-52 modem:

• Is simple and easy to use § Supports long range transmission, especially when used in conjunction with an SHDSL repeater such as RAD’s S-RPT

• Provides any Ethernet interface

• Supports transmission over copper cable

As an option the ASMi-52 can be set to meet the EN 50121-4 standard. This standard defines the EMC requirements for units being installed near roads and railways.

The drawing shown here describes a typical highway deployment, repeated in several other locations in Europe. We installed the ASMi-52L, a low cost unit designed for users needing extra Ethernet ports, alongside a autostrada. The units are installed back to back in a daisy chain. One Ethernet port is used to transmit data to the highway display boards. A second port connects the next ASMi-52 modem. Since the ASMi-52 has an internal switch, there is no need for any other equipment.

In the railway application an ASMi-52 is used to transmit data to a second unit. If extra Ethernet ports are needed, then another ASMi-52L can be installed.

 This is a simple fuel stop application that is very common. A supermarket selling gasoline has a cash register located 100 – 200 meters from the central pay station. The two registers are physically linked via copper cable but need a modem to drive the LAN data. The ASMi-52L’s low cost makes this solution particularly attractive for many end users.

To summarize: The ASMi-52 SHDSL modem can be used in a large variety of applications in the utility and transportation industries, from very simple, point to point LAN extension applications, to much more complicated long distance, daisy chain topologies.

 Now let’s look at some applications using SHDSL modems corporate applications.

 Corporate end users like banks, hotels and campuses requires share some common requirements:

• Transmission of multiple services including voice and data

• Reliable connectivity over the enterprises’ own SHDSL lines

• Long range transmission

• Reduce operational costs § And most important, any system must support star configurations. For example a typical corporate application will require a grooming device in the central office, transmitting multiplexed services over SHDSL to various branch offices.

 This slide depicts a typical corporate application. Basic services must be distributed to various remote sites. A groomer installed at the point of presence takes E1/T1 lines from the SDH/SONET backbone and distributes all services over various interfaces.

RAD’s DXC-30 enhanced xDSL multiservice access node acts as the groomer in this application, supporting up to 96 SHDSL lines. The ASMi-31 modem, ASMi-52 SHDSL modem, and FCD access units are customer located equipment, with each product installed according to the end user’s particular needs. For example the FCD-IP access is used with customers that require full or fractional E1 services but do not have their own router. However, if a router already exists at the customer site, the FCD-E1 can be deployed.

By reducing the number of leased lines required the end user is able to reduce operating costs. This complete solution offers tremendous flexibility, supplying each end user with exactly the services that are required over any media and interface, and at variable data rates.

RAD’s full range of SHDSL product solutions encompass effective modems, repeaters, routers, multiplexers and digital cross connects. No other vendor can match RAD’s wide selection of user interfaces. This lets you plan your SHDSL network with greater flexibility, offering more data and voice services with lower operating costs, all integrated by the same network management system.

In addition to the products and solutions reviewed today RAD offers other SHDSL products including integrated access devices, network termination units, access concentrators, and modems. Visit our web site at www.rad.com for more information.