Introduction; Figure 1-1: Model 922-Dslh Card - Focal 922-DSLH User Manual

Model 922-DSLH – User Manual

1.0 Introduction

The Model 922-DSLH is a combined (hybrid) Digital Subscriber Line (DSL) modem, optical modem, Ethernet
switch, and serial server. As a modem, it offers redundant long range communications over copper and up to
200 km of optical fiber. With the on-board Ethernet switch and a configurable serial server, this highly integrated
and multi-functional gateway card incorporates well into Subsea Electronics Modules (SEM) and other types of
subsea nodes, often replacing several cards with one board to save space and minimize sparing costs. An
optional interface module enables the DSL to run over existing AC power lines.
Supported communication formats include SIIS Level 3 Ethernet and serial protocols such as RS-232, RS-485
and RS-422 (IWIS). The card also performs format conversion, such as Modbus RTU (serial) to Modbus TCP
(Ethernet). System integrators can easily adapt legacy serial sensor interfaces to Ethernet based systems with
both fiber-optic and high-speed copper communication links. Conversely, Ethernet traffic can now be extended
over existing low-speed serial communication links using PPP (Point to Point Protocol).
The Model 922 software provides advanced diagnostics via Modbus TCP for real-time health monitoring of the
system as well as easy configuration of all interfaces and modes of operation.

Figure 1-1: Model 922-DSLH Card

Focal Technologies Corporation Page 1-1
A Moog Inc. Company Document No. 922-0677-00, Rev 1.0