Specifications

Chapter 1 Introduction Installation and Operation Manual
1-8 Technical Specifications ASMi-52CQ Ver. 2.12
The ASMi-52CQ modem card consists of the following major modules:
• SHDSL Interface Module – This module translates the received and
transmitted data from the four lines to the four DTE interfaces.
• Modem Glue Logic Module – This module processes the data from/to the
SHDSL interface module.
• Administration Data Transfer Module – This module manages the data
transfer between the modems on both sides of the line.
• Modem Controller – This module, based on a MC68302 microprocessor,
controls the ASMi-52CQ operation.
• LEDs Module – This module provides modem status information via LED
indicators on the front panel.
• Digital Interface – This module prepares the digital data coming from the DTE
into a data stream for the modem glue logic. In addition it translates the data
from the modem glue logic into digital data to be sent to the DTE.
1.4 Technical Specifications
Line Interface
Type 2-wire unconditioned dedicated line
Line Coding TC-PAM
Range See Table 1-1
Impedance 135Ω
Connector RJ-11 or 2-pin terminal block
Protection ITU K.21, UL1950
DTE Interface
Data Rate See Table 1-3
E1 Coding HDB3
E1 Line Impedance 120Ω, Balanced
75Ω, Unbalanced
T1 Coding AMI
T1 Line Impedance 100Ω, Balanced