RAD Data comm FCD-X21 Manual do Utilizador descarregar pdf (Página 3)

FCD-E1L, FCD-T1L

E1/T1 or Fractional E1/T1 Managed Access Units

• Maintenance capabilities include

user activated local and remote

loopbacks at the E1/T1 main link and

data ports. Local loopbacks can be

activated either from the terminal or

via the DIP switch. The user can

activate a BER test on the data port.

Additionally, the data port responds

to an ANSI FT1 RDL (T1E1.2/93-003)

inband loop code, generated by the

remote FCD-E1L, FCD-T1L or DXC

in a specific bundle of timeslots

allocated only to that port.

• E1 network statistics are stored in

memory, according to RFC 1406.

The statistic information may be

retrieved locally, through the control

port.

• T1 network statistics are stored in

memory, according to ANSI and

AT&T standards. The statistical

information may be retrieved by

the service provider (ANSI only) or

locally through the control port.

SPECIFICATIONS

E1 MAIN LINK

• Framing



256N (no MF, CCS)



256N (no MF, CCS) with CRC-4



256S (TS16 MF, CAS)



256S (TS16 MF CAS) with CRC-4



Unframed

• Bit Rate

2.048 Mbps

• Line Code

AMI

• Zero Suppression

HDB3

• Line Impedance



120Ω, balanced



75Ω, unbalanced

• Transmit Timing

Locked to the system clock

• Signal Level



Receive:

0 to -10 dB without LTU

0 to -36 dB with LTU (main

link only)



Transmit:

±3V (±10%), balanced

±2.37V (±10%), unbalanced

• Jitter Performance

As per ITU G.823, ETSI TBR-12 and

TBR-13

• Connectors



RJ-45, 8-pin, balanced



Two BNC coaxial, unbalanced

• Compliance

ITU G.703, G.704, G.706, G.732,

G.823, G.826

• Performance Monitoring



Local support of CRC-4



Full statistical diagnostics according

to RFC-1406

T1 MAIN LINK

• Framing



D4



ESF



Unframed (main link only)

• Bit Rate

1.544 Mbps

• Line Code

AMI

• Zero Suppression

Transparent, B7ZS, B8ZS

• Line Impedance

100Ω, balanced

• Transmit Timing

Locked to the system clock

• Signal Level



Receive:

0 to -10 dB without CSU

0 to -36 dB with CSU (main link

only)



Transmit:

0, -7.5, -15, -22.5 dB with CSU

±3V,±10% soft adjustable at

0 to 655 ft without CSU

• T1 Jitter Performance

As per AT&T TR-62411

• Connector

RJ-45, 8-pin, balanced

• Compliance

AT&T TR-62411, AT&T 54016,

AT&T TR-62421, ANSI T1.403

• Performance Monitoring



Local support of ESF diagnostics

according to AT&T PUB 54016



Full statistical diagnostics according

to ANSI T1.403-198

DATA PORTS

• Connectors



D-type 25-pin RS-530, female,

converted to V.35, X.21, or

V.36/RS-449 via adapter cables



D-type 25-pin V.24, female

• Data Rate

n x 64 kbps (n=1,2...,31)

• Clock Modes

DCE: RX and TX clock to user

device

DTE1: RX clock to user device;

TX clock from user device (not

for X.21, V.24)

DTE2: RX and TX clock from user

device (not for X.21, V.24)

• Control Signals



CTS follows RTS or constantly ON,

soft-selectable



DSR constantly ON, unless in test

mode



DCD constantly ON, unless in sync

loss

ETHERNET BRIDGE/ROUTER PORT

Refer to Table 1 below.

• Interface Connectors



IR-ETH, IR-ETH/Q, IR-IP: 10BaseT

(UTP) with shielded RJ-45 or

10Base2 (BNC) with two BNC

coaxial



IR-ETH/QN: 10/100BaseT (UTP)

with shielded RJ-45

GENERAL

• System Clock

Internal clock:

±50 ppm

Loopback timing:

±130 ppm

External timing from data port:

±130 ppm

• Diagnostics

Main E1/T1 link:

Local and remote loopback

Data port:

Local loopback

Remote loopback

Data port BER test

Inband code activated loopback

per data port

T1 network loopback,

code-activated (FCD-T1L only)

1 2 3 4

FCD-E1L, FCD-T1L 1

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