The Cisco 800-01238-06A0 4‑port ISDN switch module delivers seamless connectivity for businesses that rely on high‑quality digital voice and data transmission. Engineered for robust performance, this module integrates effortlessly into existing Cisco router platforms, providing reliable, low‑latency communication across multiple ISDN lines. Its compact design maximizes rack space while ensuring easy installation and maintenance, allowing IT teams to scale networks without disruption. With Cisco’s trusted reliability and comprehensive support, organizations can confidently maintain clear, uninterrupted connections for critical applications, enhancing productivity and customer satisfaction.