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When people, businesses, schools and hospitals want to buy intercom systems and have them installed, they usually by them from intercom system retailers or intercom system service firms. Some intercom system retailers and intercom companies cater mostly to private individuals who want intercoms put in their residences. People like have intercoms for security reasons. Some people put intercoms in children's rooms or nurseries. Schools and hospitals usually have intercom systems installed. Some intercom companies and retailers specialize in selling intercoms to schools, businesses and hospitals. Some intercom companies sell intercoms made just for apartment buildings. Many intercom retailers and companies sell both wired intercom systems and wireless intercom systems.
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