190 CHAPTER 4: FLEXIBLE INTERFACE CARDS

Table 134 LEDs on the ATM card panels

LED

Description

 

 

ACT

OFF means no data is being

 

transmitted or received on the

 

interface and blinking means data is

 

being transmitted and/or received.

 

 

Interface Optical Fiber

w WARNING: Laser danger: Invisible laser radiation may be emitted from the fiber-optic ports which are connected with lasers. To protect your eyes against radiation harm, never stare into an open fiber-optic port.

c CAUTION: The FIC-1ATM-OC3SML provides a long-haul fiber interface. It requires

transmission distance at least longer than 25 km (15.5 in.); otherwise, the interface cannot receive signals.

The FIC-1ATM-OC3MM must be connected using the multi-mode optical fiber whereas the FIC-1ATM-OC3SM/ FIC-1ATM-OC3SML must be connected using the single-mode optical fiber.

FIC-1G.SHDSL

Introduction FIC-1G.SHDSL, the 1-port single-pair high-speed digital subscriber line card, uses trellis coded pulse amplitude modulation (TCPAM) for coding and provides the symmetric rates up to 2.3 Mbps. Its transmission speed can automatically adapt to cable length and conditions.

Compared with ADSL, G.SHDSL allows longer transmission segment and as such, can serve a wider range of applications. It can substitute for E1/T1 lines to provide high-speed data service access. However, as TCPAM uses the band starting from 0 Hz for data transmission, G.SHDSL cannot share the same line with POTS or ISDN just like what ADSL has done.

The FIC-1G.SHDSL supports:

Manual G.SHDSL line activation/deactivation and easy-to-use fault location tools.

G.992.1-compliant interface and auto-sensing.

Interface Attributes The following table describes the interface attributes of the FIC-1G.SHDSL.

Table 135 Interface attributes of the FIC-1G.SHDSL

Attribute

FIC-1G.SHDSL

 

 

Connector

RJ-11

Number of connectors

1

Interface standard

G.991.2

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3Com MSR 20, MSR 30, MSR 50 manual Interface attributes of the FIC-1G.SHDSL