RAD Data comm FCD-G703 Manuel d'utilisateur télécharger pdf (Page 4)

E1 or Fractional E1 Access Uni

t

FCD-E1A

Figure 3. SDH Access Solution for Multiple Remote Sites

SPECIFICATIONS

ELECTRIC E1 MAIN LINK

(NETWORK) AND SUB-E1 PORTS

• Framing

256N (no MF, CCS)

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

256S (TS16 MF, CAS)

256S with CRC-4 (TS16 MF CAS)

Unframed

• Bit Rate

2.048 Mbps

• Line Code

HDB3

• Impedance

120Ω, balanced

75Ω, unbalanced

• Signal Level

Receive:

0 to -36 dB with LTU

0 to -10 dB without LTU

Transmit:

±3V (±10%), balanced

±2.37V (±10%), unbalanced

• Jitter Performance

As per ITU G.823,

ETSI TBR-12, TBR-13

• Connectors

RJ-45, 8-pin, balanced

Two BNC coaxial, unbalanced

• Transmit Timing

Locked to the system clock

• Compliance

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

• Performance Monitoring

(Main Link only)

Local support of CRC-4

Statistics according to RFC-1406

FIBER OPTIC MAIN LINK

• Compliance

G.921, G.956

• Transmitter Type

Laser

• Fiber Optic Characteristics

See Table 1

• Connectors

ST, FC/PC, or SC (see Ordering)

DATA PORTS

• Number of Data Ports

One or two (see Ordering)

• Interfaces



V.35, RS-530, V.36, X.21



V.24 (data port 2 only)

• Connectors

D-type 25-pin RS-530, female

• Data Rate

n × 56 or n × 64 kbps,

(n=1 to 31)

• Clock Modes

DCE: Rx and Tx clock to DTE

DTE1: Rx clock to user device,

Tx clock from user device

DTE2: Rx and Tx clock from DCE

• 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

• Characteristics

See Table 2

• Connector

Shielded RJ-45

"S" INTERFACE PORTS

• Number of Ports

Four "S" 2B+D interface channels

• Compliance

ETS 300012

1 2 3 4 5 6

FCD-E1A 1
SPECIFICATIONS 4

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