OFFICE110, a corporate office equipment service operated by Bell Technos Co., Ltd., analyzed anonymized inquiry data related to business phone systems received between March 3, 2025 and February 28, 2026, and summarized consultation trends before companies introduce business phone systems. The analysis found 257 inquiries related to “how many units are needed,” accounting for 48.1% of the total. The result shows that, when small and medium-sized businesses choose business phone systems, they often need to clarify on-site conditions first, such as how many phones are required, where they should be installed, and whether existing lines and wiring can support the setup, before comparing features or prices. As labor shortages continue, mistakes in call-handling design can directly increase the workload on staff. For business phone systems involving main numbers, fax, optical phone lines, PBX/main units, smartphone integration, and maintenance support, incorrect unit planning may affect installation costs and operational burden. In recent business phone inquiries, 257 cases, or 48.1%, were related to “how many units are needed.” The consultation topics extended beyond model comparison to wiring, installation, optical phone lines, fax, PBX/main units, smartphone integration, and maintenance. SME staff need to organize installation locations, simultaneous call capacity, and future expansion needs before comparing phone performance. According to OFFICE110’s analysis, the number of required phones has become a major issue before companies consider manufacturers or prices. Business phone selection begins with unit planning rather than model comparison. Related inquiries also frequently involved fees and quotations, comparative evaluation, lines and optical phone services, installation and settings, and replacement of aging equipment. Fees and quotations accounted for 143 cases, indicating that quotations are difficult to finalize before unit numbers are set. Comparative evalu