RAD Data comm FCD-G703 Instrukcja Użytkownika Pobierz pdf (Strona 2)

E1 or Fractional E1 Access Uni

t

FCD-E1A

Figure 1. Extended Ethernet Management over E1 Network

• Timeslot assignment is

programmable, allowing data from

each data or sub-E1 port to be

placed automatically into

consecutive timeslots.

Alternatively, the user can assign

timeslots manually.

• Multiple clock source selection

ensures maximum flexibility for

supporting different applications.

The E1 main link may derive its

timing from the recovered receive

clock, from an internal oscillator,

from one of the data ports, or

from the sub-E1 port.

• ISDN dial backup ensures the

continuity of data services.

• Bypassing the sub-E1 port to the

G.703 main link (electric only)

ensures uninterrupted service to

the sub-E1 port and provides

immunity from hardware or

power failures.

• FCD-E1A is a standalone unit. An

optional rack mount adapter kit

enables installation of one or two

side-by-side units in a 19-inch

rack (see Ordering).

USER INTERFACES

• The following interfaces can be

ordered for the data port: V.35,

RS-530, V.36/RS-449, or X.21.

An optional second data port can

be ordered with V.35, RS-530,

V.24, V.36/RS-449, or X.21

interfaces.

• The synchronous data ports can

operate in the following clock

modes:



DCE: FCD-E1A provides both

transmit and receive clocks to

the user equipment, with

optional sampling of the

incoming data with an inverted

clock.



DTE1: FCD-E1A provides the

transmit clock. The connected

user equipment provides receive

clock (not for X.21).



DTE2: The connected user

equipment provides both

transmit and receive clocks (not

for X.21).

• When equipped with IR-ETH,

IR-ETH/Q, or IR-ETH/QN

interface modules, FCD-E1A

transparently connects remote

LANs, as well as VLANs, over the

E1 links. It filters Ethernet packets,

forwarding only packets destined

to the WAN.

• The IR-ETH/QN port has a

10/100BaseT interface that

supports autonegotiation and

VLAN frames.

• FCD-E1A equipped with the IR-IP

interface module operates as an IP

gateway, forwarding packets

destined to the IP network. This

prevents broadcast to the WAN

and enables the LAN users to

register for an IP multicast group.

• FCD-E1A with the IR-IP interface

module connects the local IP

networks to the public networks at

full E1 speed, in contrast to

connection over statistical

protocols, such as Frame Relay.

APPLICATIONS

1 2 3 4 5 6

FCD-E1A 1
SPECIFICATIONS 4

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