Corporate Networks and Wi-Fi - Complete Business Connectivity Solution

I.T. Computers designs, implements, and manages complete corporate networks for businesses of all sizes. We offer expert consulting, network segmentation, integrated IP telephony, enterprise Wi-Fi, perimeter security, and ongoing technical support. We are your strategic partner to ensure reliable, secure, and scalable connectivity.

🔹 Why Invest in a Professional Corporate Network?

Undersized or improperly configured networks create critical problems:

• Slowness and instability: Unmanaged switches, improper cabling, and lack of QoS cause congestion and packet loss
• Security risks: Flat networks without segmentation allow intruders to access all resources after compromising a single device
• Difficulty diagnosing problems: Without centralized monitoring and logs, identifying network problems can take hours or days
• Limited scalability: Unplanned infrastructure makes it difficult to add new users, branches, or services (VoIP, cameras, IoT)
• Hidden costs: Downtime, lost productivity, and frequent support calls increase the TCO

🔹 Our Methodology: Complete Design and Implementation

1️⃣ Assessment and Requirements Gathering

• Audit of the current network infrastructure (topology, equipment, cabling, access points)
• Mapping of critical applications and bandwidth requirements (ERP, VoIP, video conferencing, backup)
• Analysis of projected growth (new users, branches, IoT devices)
• Identification of single points of failure, bottlenecks, and security risks
• Technical report with prioritized recommendations and investment estimate

2️⃣ Network Architecture Design

• Hierarchical topology: Core, distribution, and access layers for scalability and redundancy
• Network segmentation (VLANs): Traffic isolation by department, function, or security level
• Inter-VLAN routing: Firewall policies between segments, granular access control
• Link aggregation (LACP): Increased bandwidth and redundancy between switches
• Quality of Service (QoS): Prioritization of critical traffic (VoIP, video conferencing, business applications)
• High availability: Stacked switches, redundant uplinks, redundancy protocols (STP, RSTP, MSTP)
• Complete documentation: Network diagrams, IP addressing spreadsheets, VLAN matrix, firewall policies

3️⃣ Equipment Supply and Licensing

• Managed switches: Dell, HPE, Cisco, Ubiquiti (Layer 2 and Layer 3, PoE+, 10GbE)
• Routers and firewalls: Fortinet FortiGate, pfSense, Sophos XG, Ubiquiti EdgeRouter
• Wi-Fi Access Points: Ubiquiti UniFi, Aruba, Cisco Meraki, TP-Link Omada (Wi-Fi 6/6E)
• Wi-Fi Controllers: Centralized management, seamless roaming, guest network, captive portal
• IP Telephony: IP PBXs (Asterisk, 3CX, Grandstream UCM), IP phones, FXS/FXO gateways
• Structured Cabling: Cat6/Cat6A cables, patch panels, racks, organizers, certification
• Monitoring Tools: PRTG, Zabbix, LibreNMS, Nagios, Grafana

4️⃣ Installation, Configuration, and Integration

• Physical installation of switches, routers, firewalls, access points, and cabling
• Configuration of VLANs, trunking, link aggregation, and spanning tree
• Implementation of firewall policies, NAT, site-to-site VPN, and remote access
• Configuration of enterprise Wi-Fi (multiple SSIDs, 802.1X authentication, isolated guest network)
• Deployment of IP telephony integrated with the data network (separate VLANs, QoS for VoIP)
• Configuration of DHCP, DNS, NTP servers, and network services
• Performance, latency, jitter, and throughput testing
• Structured cabling certification (Fluke/DTX reports)

5️⃣ Technical Support and Ongoing Maintenance

• Specialized technical support with a defined SLA (phone, email, remote access)
• Proactive monitoring of switches, routers, firewalls, and access points
• Automatic alerts for link failures, excessive CPU/memory usage, and network attacks
• Application of security patches and firmware updates
• Monthly traffic analysis, identification of bottlenecks, and optimization recommendations
• Network expansion as the company grows (new switches, APs, VLANs)
• Internal team training and updated documentation

🔹 Specific Solutions

Network Segmentation in Companies with Multiple Departments

Challenge: How to plan network segmentation in a company with multiple departments?

I.T. Computers Solution: We create separate VLANs for each department or function:

• VLAN 10 - Servers and Storage: Restricted access for administrators only, complete isolation from end users
• VLAN 20 - Corporate Users: Access to the internet, email, ERP, CRM, corporate printers
• VLAN 30 - Guests and Public Wi-Fi: Internet access only, no access to internal resources
• VLAN 40 - IP Telephony: Priority QoS, voice traffic isolation, integration with IP PBX
• VLAN 50 - Infrastructure Management: Access to switch interfaces, firewalls, APs, servers (IT only)
• VLAN 60 - Cameras and IoT: Isolated security and IoT devices, no access to corporate data

Each VLAN has specific firewall policies, role-based access control (RBAC), and QoS to prioritize critical traffic. Inter-VLAN routing is performed by a Layer 3 switch or firewall with granular rules.

IP Telephony Integrated with the Data Network

Challenge: How to plan an IP telephony solution integrated with the company's data network?

I.T. Computers Solution: We implement a complete IP telephony solution with:

• IP PBX: 3CX, Grandstream UCM, Asterisk (on-premise or cloud)
• IP Phones: Grandstream, Yealink, Cisco (PoE, support for multiple lines, HD speakerphone)
• Dedicated VLAN for VoIP: Voice traffic isolation, priority QoS (DSCP EF, CoS 5)
• Switches with PoE+: Powering IP phones without the need for external power supplies
• FXS/FXO Gateway: Integration with existing analog lines (PSTN)
• Softphones and mobile apps: Extensions on smartphones and laptops for remote work
• Advanced Features: IVR, call queues, call recording, CDR reports, CRM integration

We guarantee voice quality (MOS > 4.0) with QoS, dedicated bandwidth, and jitter/latency monitoring.

High-Performance Enterprise Wi-Fi

Scenario: Office with 100+ simultaneous users, frequent video conferences, and a need for a guest network.

Solution: Deployment of a Wi-Fi 6 (802.11ax) network with:

• Ubiquiti UniFi 6 Pro or Aruba Instant On AP22 access points
• Centralized controller (UniFi Network Controller or Aruba Central)
• Multiple SSIDs: Corporate (WPA3-Enterprise with RADIUS), Guests (isolated captive portal)
• Seamless roaming between APs (802.11r Fast Roaming)
• Load balancing and band steering (5GHz priority)
• Site survey and heatmap for optimized coverage

🔹 Comparison: I.T. Computers vs. Distributors and Retailers

🔹 Frequently Asked Questions About Corporate Networks

What is the difference between a managed and unmanaged switch?

Unmanaged switches are plug-and-play, without configuration, suitable only for home or very small networks. Managed switches allow configuration of VLANs, QoS, link aggregation, SNMP monitoring, port mirroring, and access control (802.1X). For corporate environments, managed switches are essential for security, performance, and scalability.

How to size the bandwidth needed for my company?

We calculate bandwidth based on: (1) Number of simultaneous users, (2) Critical applications (ERP: 100-500 Kbps/user, VoIP: 100 Kbps/extension, HD video conferencing: 2-4 Mbps/room), (3) Backup and replication (calculated separately), (4) Growth margin (30-50%). For WAN links, we recommend redundancy with different carriers and load balancing.

What is the best Wi-Fi solution for offices?

It depends on the size: (1) Small (up to 30 users): 2-3 Ubiquiti UniFi or TP-Link Omada APs with a local controller. (2) Medium (30-100 users): 5-10 Wi-Fi 6 APs, dedicated controller, separate VLANs. (3) Large (100+ users): Enterprise solution (Aruba, Cisco Meraki) with cloud management, RF analysis, optimized roaming. We always perform a site survey to ensure coverage and avoid interference.

🔹 Request a No-Obligation Network Design

Contact our design team to schedule a free technical assessment. We will analyze your current network infrastructure, identify opportunities for improvement, and present a complete proposal with a detailed ROI.

📧 Email: projetos@itcomputers.com.br
📞 Phone: 0800 878 1077
💬 WhatsApp: (11) 99000-0000

I.T. Computers - Your Strategic B2B IT Infrastructure Partner