The Cisco NP-4B ISDN terminal adapter is designed to provide businesses with a reliable solution for Basic Rate Interface (BRI) connections using ISDN technology. This terminal adapter supports BRI ST (S/T-interface) for digital connections, offering two 64 Kbps B-channels for voice, data, or video and one 16 Kbps D-channel for control signals. It is commonly deployed for small office or branch environments that require stable ISDN connectivity, particularly in setups involving PBX systems or other digital network infrastructure.
This part enables efficient use of ISDN lines for communication purposes across a network, helping to reduce long-distance communication costs associated with traditional methods. The NP-4B supports a wide range of protocols including DSS1/EDSS1 (Euro-ISDN), enhancing its interoperability with other systems and vendors. The compact form factor of this terminal adapter allows easy integration within existing equipment setups, making it a viable option for both new and retrofit installations.
The Cisco NP-4B is now classified as end of life (EOL) and has been discontinued as a part of Cisco's legacy hardware. Despite its EOL status, this terminal adapter continues to be used today in certain environments where ISDN remains a viable communication standard. Replacement parts and professional service options are available to sustain this unit in operational networks, especially for legacy systems that still rely on ISDN BRI connections.
EOL Technology Services provides customised support for legacy Cisco hardware, including the NP-4B. Our team specialises in professional services for older systems, offering technical support, maintenance, and replacement parts. Even if the product has reached end-of-life, we help businesses extend the usability of their existing equipment for as long as possible.
Yes, we provide comprehensive maintenance and upgrade services to ensure your IT systems remain up to date and fully operational. From routine checks to part replacements.
Yes, if it isn't the right fit, our team can assist you in identifying the right parts that are fully compatible with your existing hardware.
We can offer a range of payment options, including upfront payment, net payment terms if approved, and bespoke agreements tailored to your requirements.
