Cisco 7945G IP Phone | Disassembly | Keys, handset hook, etc. Replacement - iFixit Repair Guide
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Teardown: Cisco 7945 IP Phone, USB 5V Power Modification & Power Consumption | Gough's Tech Zone
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Cisco 7945G IP Phone | Disassembly | Keys, handset hook, etc. Replacement - iFixit Repair Guide