Alcatel Z24 Analog Extension Card (3BA53065 / 3BA52065 AAAA KAZZB-01)

The Alcatel Z24 analog extension card, referenced by part numbers 3BA53065 and 3BA52065 AAAA KAZZB‑01, is a subscriber line interface card used in Alcatel PBX and telephony systems. This card provides multiple analog ports for connecting standard telephones, fax machines, modems, and other legacy analog devices. It is a key component for enterprises that maintain a mix of analog and IP endpoints.

Overview

The Z24 analog extension card is part of the line card family designed for Alcatel's OmniPCX and other compatible PBX chassis. It interfaces with the system's digital backplane and provides subscriber line interface circuits (SLICs) that handle battery feed, overvoltage protection, ringing, and impedance matching. The card supports loop‑start signaling and includes comprehensive line testing capabilities.

Key Features

• 24 analog subscriber ports per card (typical)

• Supports loop‑start and ground‑start signaling

• Built‑in ringing generator with adjustable frequency and voltage

• Over‑voltage and over‑current protection (ITU‑T K.20)

• Integrated line testing (metallic and transmission tests)

• Hot‑swappable for field replacement

• LED indicators for line status and alarms

• Management via PBX system software

Technical Specifications

• Ports: 24x RJ‑11 or RJ‑45 (depending on connector panel)

• Line Impedance: 600 Ω or 900 Ω (software selectable)

• Ringing Voltage: 40‑90 VAC, 20‑25 Hz

• Loop Current: 20‑40 mA

• Frequency Response: 300‑3400 Hz

• Power Consumption: 15 W typical

• Operating Temperature: 0°C to 45°C

• Dimensions: Standard PBX line card format

Applications

This card is widely used in enterprise PBX systems to connect analog desk phones, fax machines, cordless phones, and legacy equipment. It is also deployed in hospitality environments (hotels, hospitals) where analog extensions are still common.

Integration and Management

The card is managed through the PBX's software, allowing administrators to configure port parameters, monitor line status, and run diagnostic tests. It supports standard telephony features such as caller ID, call waiting, and message waiting indication.

Installation and Maintenance

Installation involves inserting the card into a designated slot in the PBX chassis and connecting the subscriber cables to the front or rear connector panel. The system automatically recognizes the card. Maintenance includes periodic line testing and cleaning of connectors. The card can be replaced without powering down the chassis.

Conclusion

The Alcatel Z24 analog extension card (3BA53065 / 3BA52065 AAAA KAZZB‑01) provides reliable, high‑density analog connectivity for modern PBX systems. Its robust protection, diagnostic features, and ease of integration make it an essential component for enterprises maintaining analog telephony devices.