l         Conversion between V.35 N x 64K (N¡Ü32) and E1 (2048Kbps, framed and unframed)

l         full duplex, supports local and remote loopbacks in compliance with V.54 standard

l         E1 interface: framed or unframed selectable

l         Line code:HDB3

l         Supports both PCM30 and PCM31 mode

l         Supports CRC function

l         Support range up to 1.5KM over 0.5mm wire gauge

l         clocking: internal, external, network(receive)

l         front panel status LEDs

l         Line impedance:120¦¸ balance / 75¦¸ unbalance selectable

l         Built-in Bit Error Rate Tester (BERT) for complete testing of the local and remote unit

l         Compact in size

l         low power consumption: ¡Ü2.5W

l         220VAC or -48VDC power supply

SPECIFICATIONS

Line Interface

Standard               ITU-T G.703, G.704

Line Type            Unloaded 4-wire twisted pair 19 to 26 AWG or

BNC 75¦¸ coaxial cable

Line Code             HDB3 (up to 2048 Kbit/s baud rate)

Baud rate            Up to 2048 Kbit/s, full duplex, sync

Framing            Unframed/Framed

Transmit Level             According to G.703

 Impedance                   75¦¸ for 2048 kbit/s unbalanced (BNC coax)

120¦¸ for 2048kbit/s balanced (RJ-45 twisted pair)

Receive voltage            0~-43 dB

Transmit high voltage             2.37¡À10%, 75¦¸

       Transmit low voltage               0¡À0.1V

                Connector       RJ-45: 120¦¸ for 2048kbit/s balanced

                                BNC coax: 75¦¸ for 2048kbit/s unbalanced

DTE interface

Date rate       N¡Á64Kbit/s£¨N¡Ü32£©or 2048Kbit/s, sync

Signal Attenuation       6dB (G.703-HDB3 Interface)

Output Level        ¡À3V (G.703-HDB3 Interface)

Type and Connector        V.35 or RS232 (DB25, female)

Timing

Transmit & Receive             Internal oscillator

External from the DTE

Receive clock derived from the receive signal,

looped back as a transmit clock

Diagnostics

V.54 Loopbacks         Local loopback (LLOOP): DIP 7 of SW5

                                                        Remote loopback (RLOOP): DIP 8 of SW 5

Internal BERT           Built-in pattern generator and tester, complies with

ITU V.52

Physical

Height              36 mm/1.4 in

Width               200 mm/7.7 in

Depth               146 mm/5.7 in

Weight              0.4kg / 0.88lb

Power Supply

AC Source            220 VAC (¡À10%), 50 to 60 Hz, 2.5 VA

DC Source                  -48 VDC (-36 to -72 VDC), 2.5W

Power Consumption           AC: 2.5 VA

DC: 2.5W

Environment

Operation temperature         0 -50¡ãC

Storage temperature         -20~70¡æ

Humidity         Up to 95%, non-condensing