Alcatel-Lucent AWR12 S1-1 UN Interface (T3PQAC3AAA)

The Alcatel‑Lucent AWR12 S1‑1 (also designated T3PQAC3AAA) is a user network (UN) interface module designed for use in telecom switching platforms, particularly the 5ESS family of central office switches. This interface provides the physical and logical connectivity between the switch and subscriber lines or trunk circuits, supporting voice, data, and signaling applications. It is a critical component for delivering reliable telecommunications services in central office and access network environments.

Overview

The AWR12 S1‑1 UN interface module is typically installed in a dedicated slot within the 5ESS switch frame, where it interfaces with the switch's internal bus and external copper or fiber facilities. The module supports multiple subscriber loops or trunk circuits, incorporating line interface circuits, analog‑to‑digital conversion, and signaling processing. It is designed for hot‑swappable operation to minimize service disruption during maintenance or expansion.

Key Features

• User network interface for subscriber and trunk connectivity

• Supports analog and digital signaling protocols

• Built‑in line conditioning and signal processing

• Hot‑swappable for easy maintenance

• Front‑panel LEDs for status and alarm indication

• Management via central office maintenance system

Technical Specifications

• Interface Type: User Network (UN) – subscriber lines or trunks

• Line Signaling: Loop‑start, ground‑start, E&M, or digital CAS

• Impedance: 600Ω or 900Ω (selectable)

• Power Supply: -48 VDC from backplane

• Power Consumption: 20 W typical

• Operating Temperature: 0°C to 45°C

• Dimensions: Standard 5ESS card form factor

Applications

This interface module is used in central offices to connect subscriber lines (POTS, ISDN) or trunk circuits (T1/E1) to the 5ESS switch, enabling voice and data services for residential and business customers.

Integration and Management

The module is managed through the 5ESS switch's maintenance and administration system, providing circuit provisioning, performance monitoring, and fault isolation.

Installation and Maintenance

Install the card into the appropriate slot, connect external cabling, and configure via the switch software. Routine maintenance includes monitoring error statistics and cleaning connectors.

Conclusion

The Alcatel‑Lucent AWR12 S1‑1 UN interface provides reliable user‑network connectivity, essential for maintaining voice and data services in telecom central offices.