Ключевые слова: advice, assistant, business, call, center, closeup, cold calling, communication, communications, conference, consultant, consulting, contact, contact us, contemporary, customer, desk, dial, dialing, equipment, global, hand, help, helpdesk, helpline, hotline, internet, ip, keypad, line, marketing, modern, office, operator, person, phone, receiver, sales, service, support, switchboard, technology, telecommunication, telemarketing, telephone, telephony, using, voice, voip,