Andrew CTD-410CA Networking Adaptor 9-Pin to RJ-11 Connector

Andrew CTD-410CA Networking Adaptor 9-Pin to RJ-11 Connector

This is a vintage networking adaptor manufactured by Andrew Corporation, designed to interface between 9-pin serial connectors (DB-9) and RJ-11 modular jacks. The CTD-410CA serves as a bridge connector for legacy telecommunications and data networking systems, enabling compatibility between equipment using different connector standards. These adaptors were commonly used in telephone switching systems, data communication networks, and telecommunications test equipment throughout the 1980s and 1990s.

Specifications & What's Included

• Manufacturer: Andrew Corporation
• Model: CTD-410CA
• Input Connector: DB-9 (9-pin D-subminiature)
• Output Connector: RJ-11 (6-pin modular jack)
• Form Factor: Inline adapter with cable assembly
• Application: Serial to modular telecommunications interface
• Era: 1980s–1990s telecommunications equipment standard
• Condition: Used, inspected

Applications

The CTD-410CA was designed for use in telecommunications infrastructure, telephone switching systems, and data communication networks that required interfacing between standard 9-pin serial ports and RJ-11 telephone jack standards. These adaptors remain useful for connecting legacy networking equipment, test instruments, and telecommunications devices that use DB-9 connectors to modern or legacy RJ-11-based systems. They are commonly sought for maintaining older telecom test benches, laboratory equipment, and data communication setups that bridge equipment from different eras. This adaptor represents the connector standardization period when the industry was transitioning between various serial and modular jack standards.