DS26521 datasheet(15/258 Pages) MAXIM

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DS26521 Single T1/E1/J1 Transceiver

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Table 4-2. E1-Related Telecommunications Specifications

ITU-T G.703 Physical/Electrical Characteristics of G.703 Hierarchical Digital Interfaces

Defines the 2048kbps bit rate—2048 ±50ppm; the transmission media are 75

Ω coax or 120Ω twisted pair; peak-to-

peak space voltage is ±0.237V; nominal pulse width is 244ns.

Return loss 51Hz to 102Hz is 6dB, 102Hz to 3072Hz is 8dB, 2048Hz to 3072Hz is 14dB.

Nominal peak voltage is 2.37V for coax and 3V for twisted pair.

The pulse template for E1 is defined in G.703.

ITU-T G.736 Characteristics of Synchronous Digital Multiplex Equipment Operating at 2048kbps

The peak-to-peak jitter at 2048kbps must be less than 0.05UI at 20Hz to 100Hz.

Jitter transfer between 2.048 synchronization signal and 2.048 transmission signal is provided.

ITU-T G.742 Second-Order Digital Multiplex Equipment Operating at 8448kbps

The DS26521 jitter attenuator is complaint with jitter transfer curve for sinusoidal jitter input.

ITU-T G.772

This specification provides the method for using receiver for transceiver 0 as a monitor for the remaining seven

transmitter/receiver combinations.

ITU-T G.775

An LOS detection criterion is defined.

ITU-T G.823 The control of jitter and wander within digital networks that are based on 2.048kbps hierarchy.

G.823 Provides the jitter amplitude tolerance at different frequencies, specifically 20Hz, 2.4kHz, 18kHz, and

100kHz.

ETS 300 233

This specification provides LOS and AIS signal criteria for E1 mode.

Pub 62411

This specification has tighter jitter tolerance and transfer characteristics than other specifications.

The jitter transfer characteristics are tighter than G.736 and jitter tolerance is tighter than G.823.

(ITU-T) “Synchronous Frame Structures used at 1544, 6312, 2048, 8488, and 44736kbps Hierarchical Levels”

(ITU-T) “Frame Alignment and Cyclic Redundancy Check (CRC) Procedures Relating to Basic Frame Structures

Defined in Recommendation G.704”

(ITU-T) “Characteristics of Primary PCM Multiplex Equipment Operating at 2048kbps”

(ITU-T) Characteristics of a Synchronous Digital Multiplex Equipment Operating at 2048kbps”

(ITU-T) “Loss Of Signal (LOS) and Alarm Indication Signal (AIS) Defect Detection and Clearance Criteria”

(ITU-T) “The Control of Jitter and Wander Within Digital Networks Which are Based on the 2048kbps Hierarchy”

(ITU-T) “Primary Rate User-Network Interface—Layer 1 Specification”

(ITU-T) “Error Performance Measuring Equipment Operating at the Primary Rate and Above”

(ITU-T) “In-Service Code Violation Monitors for Digital Systems”

(ETS) “Integrated Services Digital Network (ISDN); Primary Rate User-Network Interface (UNI); Part 1/Layer 1

Specification”

(ETS) “Transmission and Multiplexing; Physical/Electrical Characteristics of Hierarchical Digital Interfaces for

Equipment Using the 2048kbps-Based Plesiochronous or Synchronous Digital Hierarchies”

(ETS) “Integrated Services Digital Network (ISDN); Access Digital Section for ISDN Primary Rate”

(ETS) “Integrated Services Digital Network (ISDN); Attachment Requirements for Terminal Equipment to Connect

to an ISDN Using ISDN Primary Rate Access”

(ETS) “Business Telecommunications (BT); Open Network Provision (ONP) Technical Requirements; 2048kbps

Digital Unstructured Leased Lines (D2048U) Attachment Requirements for Terminal Equipment Interface”

(ETS) “Business Telecommunications (BTC); 2048kbps Digital Structured Leased Lines (D2048S); Attachment

Requirements for Terminal Equipment Interface”

(ITU-T) “Synchronous Frame Structures Used at 1544, 6312, 2048, 8488, and 44736kbps Hierarchical Levels”

(ITU-T) “Frame Alignment and Cyclic Redundancy Check (CRC) Procedures Relating to Basic Frame Structures

Defined in Recommendation G.704”

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