4200754L3 - AdTran Atlas 550 Dual USSI Module - X.21/V11

Product Description

The Adtran 4200754L3 is a Dual Universal Serial System Interface (USSI) Module specifically designed for integration with the Adtran Atlas 550 series of access routers. This module provides two independent serial ports that support the X.21 and V.11 physical layer standards. These interfaces are commonly used for Wide Area Network (WAN) connections, particularly in international telecommunications and for connecting to specialized serial equipment that requires high-speed synchronous data transmission. The module's ability to support both X.21 and V.11 standards makes it a versatile option for various connectivity needs. X.21 is a standard for synchronous, full-duplex data transmission over public data networks, often used for leased lines and digital data services. V.11, also known as X.27, defines electrical characteristics for balanced voltage digital interface circuits, providing robust signaling for longer cable runs and higher speeds compared to some other serial interfaces. By equipping the Atlas 550 with the 4200754L3 module, network administrators can establish high-speed serial connections for applications such as Frame Relay, leased lines, or direct connections to other serial devices. This module is crucial for scenarios where traditional serial connectivity is still required or preferred, offering a reliable and high-performance solution for data transport over serial links within the Adtran networking ecosystem.