What Is Cisco CUCM?

Cisco Unified Communications Manager (CUCM)—formerly known as Cisco CallManager—serves as the foundational call-control and session-management engine for enterprise collaboration networks worldwide. Designed to consolidate voice, video, data, and mobile communications onto a single IP-based infrastructure, CUCM replaces traditional Private Branch Exchange (PBX) hardware with a scalable, software-centric platform. Whether handling thousands of simultaneous calls across... » read more

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What Is Cisco Call Manager?

Cisco Call Manager—officially designated as Cisco Unified Communications Manager (CUCM)—is an enterprise-grade, IP-based Private Branch Exchange (PBX) and unified communications platform. Developed by Cisco Systems, it serves as the central intelligence engine for voice, video, messaging, and presence across enterprise networks. Rather than relying on traditional time-division multiplexing (TDM) circuits and analog wiring, CUCM processes... » read more

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What Is Cisci?

If you have searched for “cisci,” you have almost certainly encountered a frequent typographical error for Cisco Systems, Inc. Cisco is one of the foundational architects of the modern internet and the world’s leading provider of enterprise networking, cybersecurity, cloud infrastructure, and telecommunications hardware and software. Founded in 1984 by Stanford University computer scientists Leonard... » read more

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What Is Call Manager Cisco?

Cisco Unified Communications Manager (CUCM)—historically and widely known as Cisco CallManager—is the core call-routing and session-management engine of Cisco’s enterprise collaboration portfolio. Originally developed by Selsius Systems and acquired by Cisco in 1998, CallManager transitioned enterprise telephony from legacy time-division multiplexing (TDM) and hardware Private Branch Exchanges (PBXs) to IP-based unified communications. Today, it serves... » read more

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What Is ACI Cisco?

Cisco Application Centric Infrastructure (ACI) is Cisco’s flagship Software-Defined Networking (SDN) solution built specifically for enterprise data centers and private cloud architectures. Unlike traditional networks that rely on manual, switch-by-switch CLI configurations and VLAN-centric segmentation, Cisco ACI introduces a centralized, policy-driven model. It automates fabric management, enforces zero-trust security postures, and accelerates workload deployment by... » read more

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How to Delete a VLAN on Cisco Switch

Virtual Local Area Networks (VLANs) segment network traffic at Layer 2 to improve security, reduce broadcast domains, and organize logical network boundaries. However, as networks evolve through decommissioning projects, subnet migrations, or device replacements, unused VLANs frequently linger in the switch configuration. Removing obsolete VLANs reduces operational clutter, prevents unintended bridging, and reclaims administrative overhead.... » read more

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How to Configure Default Gateway on Cisco Switch

When deploying a Cisco switch in an enterprise network, managing the device remotely across subnets is essential. By default, a Layer 2 switch operates strictly within its local broadcast domain; it can communicate with hosts residing in its own subnet, but it cannot reply to management traffic—such as SSH, SNMP, syslog, or TACACS+ requests—originating from... » read more

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How to Change VLAN Port on Cisco Switch

Segmenting local network traffic into Virtual Local Area Networks (VLANs) is a fundamental task for network engineers and system administrators. Whether onboarding a new workstation into an accounting subnet, reassigning a VoIP desk phone, or isolating an IoT device into an untrusted zone, knowing how to reassign switchports between VLANs in Cisco IOS and Cisco... » read more

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How to Set Default Gateway in Cisco Switch

Configuring a default gateway on a Cisco switch is an essential prerequisite for out-of-band and in-band network management. While a Layer 2 switch forwards frames within the local broadcast domain using MAC addresses without needing routing information, it acts as an IP host for its own control plane. Whenever the switch must send management traffic—such... » read more

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