Nortel NT8P74CB Primary Rate Interface (PRI) Board
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Nortel NT8P74CB Primary Rate Interface (PRI) Board

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NT8P74CB
Description

The Nortel NT8P74CB is a high-density Primary Rate Interface (PRI) board designed for integration into Nortel’s multiservice switching and voice-over-IP (VoIP) gateway platforms. This module provides the physical and logical termination for ISDN PRI circuits, supporting T1 (1.544 Mbps) or E1 (2.048 Mbps) standards depending on the system configuration and regional signaling requirements. It is primarily used to connect the switching system to the Public Switched Telephone Network (PSTN) or for linking private branch exchange (PBX) systems, facilitating high-capacity digital voice and data transmission over multiplexed channels. The board handles essential Layer 1 and Layer 2 functions, including line framing, synchronization, and D-channel signaling management. The NT8P74CB incorporates advanced jitter attenuation and clock recovery circuitry to ensure precise timing across all B-channels, maintaining high voice quality and data integrity. It features comprehensive diagnostic capabilities, such as remote loopback testing, bit error rate (BER) monitoring, and real-time alarm reporting for signal loss (LOS) or frame synchronization failures. Designed for carrier-grade reliability, the module is hot-swappable and supports redundancy schemes to prevent service interruption. It interfaces with the system's main processor for centralized call routing, trunk provisioning, and performance telemetry.

Features
Equipment Type:
Line Card
Equipment Type:
Brand:
Nortel Networks
Original product:
Delivery period:
Price not specified