Avaya Lucent TN747B 8-Port Central Office Trunk Card

Overview
The Avaya Lucent TN747B 8-Port Central Office Trunk Card is a high-performance interface module designed for carrier-grade telephone switches and digital PBX systems. It provides reliable, low-latency connectivity for up to eight T1/E1 trunks, enabling service providers and large enterprises to expand voice capacity while maintaining crystal-clear call quality.

Key Features

• Eight independent T1/E1 ports with full duplex operation
• Supports both PRI and CAS signalling formats
• Built-in line coding and framing for seamless integration
• Hot-swap capable for zero-downtime maintenance
• Robust error detection and correction mechanisms
• Compact, rack-mountable design for space-constrained cabinets

Technical Specifications

• Port type: T1 (North America) / E1 (International)
• Data rate per port: 1.544 Mbps (T1) or 2.048 Mbps (E1)
• Signalling: PRI, CAS, D channel data rates up to 64 kbps
• Power consumption: max 30 watts
• Operating temperature: 0 to 40 degrees Celsius
• Humidity: 10 to 90 percent non-condensing
• Dimensions: 1U rack height, 17.5 inches width, 8.5 inches depth
• Compliance: FCC Part 68, CE, RoHS

Applications
The TN747B is ideal for:

• Telecommunications carriers expanding trunk capacity in central offices
• Large corporate campuses requiring reliable PRI connections for VoIP gateways
• Contact centre environments that need high-density voice channels
• Service providers offering hosted PBX or SIP trunking solutions
• Any mission-critical voice network where uptime and call quality are paramount

By choosing the Avaya Lucent TN747B, organizations gain a scalable, dependable trunk solution that simplifies network architecture and reduces total cost of ownership while delivering the performance expected from a leading industry manufacturer.