3AL78831AA 21×2 MBit/s 75 Ohm
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Alcatel-Lucent 3AL78831AA 21×2 MBit/s 75 Ohm
Product Overview
The Alcatel-Lucent 3AL78831AA is a 21×2 Mbit/s tributary interface module designed for Alcatel-Lucent SDH and access transport systems. It provides 75-ohm coaxial terminations and supports structured E1 tributary services. Because the module delivers stable low-rate transport, it is widely used in legacy and mixed networks. In addition, it fits into Alcatel-Lucent 16xx transport shelves. As a result, it supports reliable service delivery for operators that still depend on E1-based infrastructure.
Key Features
21×2 Mbit/s E1 tributary module
75-ohm coaxial interfaces
Part number: 3AL78831AA
Designed for Alcatel-Lucent 16xx SDH transport systems
Stable low-rate synchronous transmission
Compact plug-in format for quick installation
Supports legacy voice and data aggregation
Built for carrier-grade availability
Front-panel labeling for simple port identification
Technical Specification Highlights
The 3AL78831AA module provides 21 E1 tributary inputs, each operating at 2.048 Mbit/s with 75-ohm coax connectors. It integrates with Alcatel-Lucent 1660 SM, 1662 SM-C and related SDH transport platforms. Because the module supports synchronous framing, it works in networks that require strict timing. The card includes port status elements and alignment features to maintain stable operation. It supports alarms and system reporting through the shelf management controller. The design is suitable for long-term telecom environments where continuous operation is expected.
Usage & Application
This module is used in backbone, metro and access networks requiring E1 aggregation. Because many operators still maintain services based on 2 Mbit/s circuits, the module supports interconnect, backhaul and utility networks. It works well in areas where legacy SDH services remain active. Moreover, it fits mixed platforms that combine E1, Ethernet and optical transport. As a result, it is often deployed in central offices, POP sites and industrial networks with strict timing needs.
Why Choose this Product
Choose the Alcatel-Lucent 3AL78831AA if you need a dependable 21×2 Mbit/s, 75-ohm tributary card for SDH systems. It supports synchronous E1 services, integrates seamlessly with the 16xx family and offers long-term reliability. Because it is built for carrier environments, it remains a practical choice for operators managing legacy and hybrid networks.
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