Name: PA-4B-U Cisco 4-Port ISDN BRI Network Adapter Integrated Voice Data
Brand: Cisco
SKU: PA-4B-U
Price: 131.60 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The PA-4B-U Cisco 4-Port ISDN BRI Network Adapter adds four ISDN BRI interfaces to Cisco routers, enabling digital voice and data services over ISDN lines. It fits into enterprise networks where ISDN remains a key part of communication infrastructure, offering flexible and reliable connectivity options.

General Information
Brand	Cisco
Part Number	PA-4B-U

Connectivity & Physical
Weight	3.00
Condition	Refurbished

Miscellaneous
Assembly Required	Yes
Eco Friendly	Yes
Compliance Standards	WEEE, RoHS, cURus, CE, FCC, CCC, UL, TUV, cULus, CSA, cUL

Product Description
The PA-4B-U is a Cisco network adapter designed to provide four ISDN Basic Rate Interface (BRI) ports. This adapter is commonly used in communication systems that require digital voice and data transmission over ISDN lines. Built for Cisco routers, it is often found in enterprise and service provider environments where reliable ISDN connectivity is necessary. Network administrators and engineers typically deploy this adapter to integrate legacy ISDN services with modern IP networks efficiently. Key Features Offers four ISDN BRI interfaces for simultaneous voice and data Ensures seamless integration with compatible Cisco router models Supports multiple ISDN standards and signaling protocols Provides robust performance for both point-to-point and multipoint setups Compact design simplifies installation within router chassis This adapter is typically installed in office or data center environments where ISDN connectivity remains essential for telephony or backup communication lines. It helps maintain stable digital connections and supports diverse network configurations without complexity.

Use Cases
The PA-4B-U Cisco 4-Port ISDN BRI Network Adapter is typically deployed in enterprise and branch office environments where legacy ISDN services continue to play a crucial role. IT teams managing mixed voice and data networks benefit from its ability to integrate with Cisco routers, providing dependable digital connectivity for critical telephony and data transfer applications. How It's Used: Connecting remote branch offices that rely on ISDN BRI lines for secure and consistent voice and data communication. Supporting enterprise contact centers that utilize integrated voice and data channels over ISDN networks. Facilitating point-to-multipoint ISDN connections in distributed enterprise settings requiring flexible network topologies. Integrating legacy telephony infrastructure within modern Cisco router deployments for seamless voice/data convergence. Enabling secure digital leased line services in government or healthcare organizations that maintain ISDN-based communications. This adapter enhances operational efficiency by bridging traditional ISDN services with Cisco's routing platforms, allowing scalable management of voice and data traffic in hybrid network architectures. Its modular design supports evolving network demands without requiring full infrastructure overhaul.

PA-4B-U Cisco 4-Port ISDN BRI Network Adapter Integrated Voice Data

Product Overview

General Information

Connectivity & Physical

Miscellaneous

Product Description

Use Cases