RAD Data comm FCD-X21 Instrukcja Użytkownika Pobierz pdf (Strona 2)

M

anaged E1/T1 or Fractional E1/T1 Access Uni

t

FCD-E1LC, FCD-T1LC

• The optional sub-E1 port can be

configured to work without CRC-4,

while the E1 main link is working

with CRC-4. This enables

connection of E1 equipment not

supporting CRC-4, over an E1

network that is working with

CRC-4.

• The optional sub-T1 port can be

configured with D4 or ESF framing,

while the T1 main link framing is

ESF. This enables connection of T1

D4 equipment over an ESF T1

network.

• Timeslots can be programmed to

automatically assign data from each

data port into consecutive timeslots.

The user can also assign timeslots

manually.

• Multiple clock source selection

ensures maximum flexibility for

supporting different applications.

Timing for the E1/T1 main link

and sublink may come from the

recovered receive clock, an

internal oscillator, or one of the

data ports.

• Front panel LEDs indicate alarms,

E1/T1 signal loss, and diagnostic

loopback operation. Rear panel

LEDs on the Ethernet interface

modules indicate LAN status and

activity.

• FCD-E1LC and FCD-T1LC are

available as standalone units or

can be installed in a 19-inch rack

using a rack mount adaptor kit

(see Ordering).

USER INTERFACES

• FCD-E1LC and FCD-T1LC support

the following user interfaces:



Serial data interfaces: RS-530,

V.35, X.21, V.36/RS-449



Ethernet 10/100BaseT LAN

interface module with a built-in

bridge (IR-ETH/QN).

• FCD-E1LC, FCD-T1LC have

synchronous data ports that

operate in the following clock

modes:



DCE: FCD-E1LC, FCD-T1LC

provide both transmit and

receive clocks to the user

equipment, with optional

sampling of the incoming data

with an inverted clock.



DTE1: FCD-E1LC, FCD-T1LC

provide the transmit clock. The

attached user equipment

provides the receive clock.



DTE2: the attached user

equipment provides both

transmit and receive clocks.

• The IR-ETH/QN interface module

has a 10/100BaseT interface that

supports VLAN frames,

autonegotiation, fault propagation,

and automatic learning and aging.

The module transparently

connects FCD-E1LC and

FCD-T1LC to remote LANs over

E1/T1 links. It filters Ethernet

frames and forwards only frames

that are destined for the WAN.

MANAGEMENT & MAINTENANCE

• Status and diagnostic information

is defined, configured, and

monitored using one of the

following methods:



ASCII terminal connected to the

async control port



SNMP management



Telnet.

• FCD-E1LC and FCD-T1LC have

an internal SNMP agent that is

managed by any generic SNMP

station or by the RADview SNMP

network management application.

• FCD-E1LC and FCD-T1LC support

both dial-in and dial-out modem

connections through the serial

RS-232 port, by using SLIP or PPP

protocol or a command line

interpreter on an ASCII terminal.

These out-of-band connections

can be used for remote

configuration and monitoring, as

well as for sending callout alarm

messages.

• Up to 100 time-stamped alarms

are available for retrieval through

the supervision terminal, a Telnet

host, or a RADview management

station.

APPLICATION

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