CS-03, Part VII — Requirements for Limited-Distance Modem and Digital Subrate Terminal Equipment

Issue 9, Amendment 4
September 2012

Contents


1.0 Introduction

1.1 Scope

This part sets forth the minimum technical requirements for limited-distance modem (LDM) terminal equipment (TE) and digital subrate (DS) TE.

1.2 Technical Requirements

The technical requirements for LDM TE and DS TE are given in Table A. For each type of TE covered by this specification, an asterisk (*) indicates which of the requirements apply.

Table A – Technical Requirements for LDM TE and DS TE
Section Requirement LDM TE Digital Subrate TE
2.0 Electrical and Mechanical Stresses * *
3.1.1 Signal Level Limitations *  
3.2.1 Pulse Repetition Rate   *
3.2.2 Template for Maximum Output Pulse   *
3.2.3 Average Power   *
3.2.4 Encoded Analog Content   *
3.2.5 Equivalent Power Spectral Density (PSD) for Maximum Output   *
3.2.6 Limitations on Terminal Equipment Connected to Public Switched Digital Service (PSDS)   *
3.2.7 Signalling Interference   *
3.2.8 On-Hook Level   *
3.2.9 Transverse Balance Limitations   *

1.3 Sequence of Equipment Testing

1.3.1 Overall Sequence

The tests shall be performed in the following order for single or multiple line equipment:

Section 1.4 Connecting Arrangements
Section 1.5 Operational Check
Section 3.0 Network Protection Requirements and Tests
Section 2.1 (Part I) Mechanical Shock
Section 2.2 (Part I) Dielectric Strength
Section 2.3 (Part I) Hazardous Voltage Limitations
Section 2.4 (Part I) Surge Voltage (Type B)
Section 1.5 Operational Check
Section 3.0 Network Protection Requirements and Tests
Section 2.2 (Part I) Dielectric Strength
Section 2.3 (Part I) Hazardous Voltage Limitations
Section 2.4 (Part I) Surge Voltage (Type A)
Section 1.5 Operational Check
Section 3.0 Network Protection Requirements and Tests

Note 1:

  1. Section 2.2 (Part I) specifies the requirements and tests for dielectric strength to assure protection of the network from hazardous voltages arising from AC powered TE, as well as from non-registered equipment connected to TE.
  2. Sections 2.3 and 2.4 (Part I) specify the requirements and tests for:
    • environmental conditioning electrical stress prior to repeating tests of Section 3.0; and
    • hazardous voltage isolation.

Note 2: The steady state voltage stress tests specified in Section 2.3 (Part I) shall be performed prior to the electrical surge tests specified in Section 2.4 (Part I).

1.4 Connecting Arrangements

TE intended for direct electrical connection shall be equipped with a cord and plug or chassis mounted connector in accordance with Part III, and shall identify the connector codes used.

1.5 Operational Check

The TE shall be fully operational when checked in accordance with the operating instructions for all features which are described in the manufacturer's instruction manual and which are necessary to allow demonstration of compliance with all applicable requirements of Section 3.0.

2.0 Electrical and Mechanical Stresses

Refer to Part I, Section 2.0.

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