RAD Data comm ASMi-52 Manuel D’Utilisation

Chapter 1 Introduction

Installation and Operation Manual

1-12 Technical

Specifications

ASMi-52 Ver. 2.5

Internal oscillator

– Serves as a source of internal clock for the ASMi-52 unit.

Modem glue logic module

– Processes the data from/to the SHDSL interface

module.

SHDSL line interface

– Translates the received and transmitted data from the line

to the DTE interface.

Power supply

– Provides 2.5V, 3.3V, 5V and -5V to the ASMi-52 internal

elements.

CPU

– Controls the ASMi-52 operation.

10/100BaseT management port

– Provides LAN connection to the SNMP

management station or Telnet host.

LEDs and terminal interface

– Provides modem status information via LED

indicators on the front panel, and communicates with the
supervisory terminal.

1.4 Technical

Specifications

Line Interface

Type

2/4-wire unconditioned dedicated line (twisted pair)

Line Coding

TC-PAM

Range

See

Table 1-1

Impedance

135Ω

Connectors

• ASMi-52: RJ-45
• ASMi-52CD: Two RJ-45

Standard

ITU-T 991.2, ETSI 101 524

E1 Jitter
Performance

As per ITU G.823

Protection

ITU K.21, UL1950

DTE Interface

Data Rate

Depends on the DTE/line interface type and clock mode
(see

Table 1-2

and

Table 1-3

)

• 2-wire (external clock): 64–2304 kbps,

2-wire (internal clock): 64–2048, 2304 kbps

• 4-wire (external clock): 64–4608 kbps,

4-wire (internal clock): 64–4096, 4608 kbps

• ASMi-52CD/4W:

(external clock): 128-4608 kbps
(internal clock): 128-4096, 4608 kbps

Coding

• E1: HDB3
• T1: B8ZS or AMI

Line Impedance

• E1: 120Ω, balanced

75Ω, unbalanced (via adapter cable)