https://www.reeftel.com/blogs/reef-telecom-knowledge-base-how-tos/cisco-mpp-firmware-upgrade-safely-check-the-version-use-the-upgrade-rule-and-verify 2026-11-12T20:01:06-05:00 monthly https://cdn.shopify.com/s/files/1/0672/5337/1121/articles/cisco-mpp-firmware-upgrade-safely-check-the-version-use-rule.webp Cisco MPP Firmware Upgrade, Safely: Check the Version, Use the Upgrade Rule, and Verify Cisco CP-8851-3PCC-K9 Multiplatform IP phone https://www.reeftel.com/blogs/reef-telecom-knowledge-base-how-tos/sip-registration-troubleshooting-checklist 2026-11-09T10:02:32-05:00 monthly https://cdn.shopify.com/s/files/1/0672/5337/1121/articles/yealink-t54w-sip-gigabit-ip-phone-yealink-t54w-refurbished-yealink-t54w-r-reef-telecom-95153.webp SIP Registration Troubleshooting Checklist: Phone Won't Register, One-Way Audio, and NAT Yealink T54W SIP Gigabit IP phone with color display and keypad, refurbished model. https://www.reeftel.com/blogs/reef-telecom-knowledge-base-how-tos/yealink-t54w-wi-fi-and-bluetooth-setup 2026-11-09T09:58:24-05:00 monthly https://cdn.shopify.com/s/files/1/0672/5337/1121/articles/yealink-t54w-wifi-bluetooth-featured-1600x900.jpg Yealink T54W: Wi-Fi and Bluetooth Setup , Run the Phone Without a Desk Cable Yealink SIP-T54W IP phone with colour display - Wi-Fi and Bluetooth setup guide, Reef Telecom Knowledge Base https://www.reeftel.com/blogs/reef-telecom-knowledge-base-how-tos/optics-and-transceiver-compatibility-basics-sfp-vs-sfp-fiber-types-and-cisco-checks 2026-11-06T09:50:11-05:00 monthly https://cdn.shopify.com/s/files/1/0672/5337/1121/articles/cisco-10gbase-multimode-fiber-sfp-sfp-10g-sr-sfp-10g-sr-r-reef-telecom-68663.webp Optics and Transceiver Compatibility Basics: SFP vs SFP+, Fiber Types, and Cisco Checks Cisco SFP-10G-SR 10GBASE-SR SFP+ transceiver module, 850nm multimode fiber https://www.reeftel.com/blogs/reef-telecom-knowledge-base-how-tos/voice-vlans-on-cisco-catalyst-switches-configuration-dhcp-and-qos-trust 2026-11-04T10:14:24-05:00 monthly https://cdn.shopify.com/s/files/1/0672/5337/1121/articles/cisco-catalyst-9300-24-port-1g-copper-with-fixed-4x10g1g-sfp-uplinks-poe-network-essentials-c9300l-24p-4x-e-refurbished-c9300l-24p-4x-e-r-reef-telecom-21158.webp Voice VLANs on Cisco Catalyst Switches: Configuration, DHCP, and QoS Trust Cisco Catalyst 9300L 24-port PoE+ switch with 4x10G SFP+ uplinks, front view https://www.reeftel.com/blogs/reef-telecom/cisco-catalyst-switch-buying-guide-2960x-9200l-9300 2026-11-02T10:05:06-05:00 monthly https://cdn.shopify.com/s/files/1/0672/5337/1121/articles/catalyst-switch-buying-guide-featured-1600x900.jpg Cisco Catalyst Switch Buying Guide: 2960X, 9200L, or 9300? 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