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FCD-E1E

Managed E1 and Fractional E1 Access Device

FCD-E1E supports both 2 and 16 frames

per multiframe, with or without CRC-4.

The E1 interface also accepts a 2048-kbps

data stream and converts it to an ITU-T

Rec. G.703 unframed signal for transport

over the E1 main link and sublink. Line

code is HDB3/AMI. The integral LTU

ensures a range of up to 2 km (1.2 miles)

and is software selectable.

The optional sub-E1 port can be

configured to work without CRC-4, while

the E1 main link is working with CRC-4.

E1 equipment not supporting CRC-4 can

thus connect to an E1 network that does

work with CRC-4.

Bypassing the sub-E1 port to the main link

ensures uninterrupted service to the

sub-E1 port and full immunity to hardware

and power failure.

The unit can be configured to assign data

from the data port into consecutive

timeslots or the user can assign timeslots

manually.

Multiple clock source selection ensures

maximum flexibility. Timing for the E1

main link and sublink may come from the

recovered receive clock, an internal

oscillator, or the data port.

An optional 10/100BaseT Ethernet port

can be ordered for management, with or

without bridge functionality.

Note: The devices originally ordered with

management only functionality (/UTPM) can be

upgraded to the /UTP (bridge and management)

functionality by ordering a special software license

key (see Ordering).

Front-panel LEDs indicate power, alarms,

and diagnostic loopback operation. Rear

panel LEDs on the E1 interfaces indicate

local and remote sync loss. Rear-panel

LEDs on the optional Ethernet port

indicate link integrity and activity.

FCD-E1E is available in two models:

• Plastic enclosure (FCD-E1E)

• Metal enclosure with LCD and

push-buttons on the front panel

(FCD-E1E/L).

Both enclosures can be mounted alone or

in pairs in a 19-inch rack using RAD’s

optional rack mount kits (see

Ordering

Figure 1. Point to Point Ethernet, Data and Fractional E1 over E1

1 2 3 4 5 6 7 8

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