For decades, supporting POTS-based communications followed a familiar pattern. When a customer reported a problem, a technician was dispatched to the site. The technician inspected the equipment, checked wiring, reviewed network connections, and attempted to identify the issue. If the problem required additional expertise, a second visit was often scheduled.

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Replacing elevator phones is the most common application among the many POTS replacement projects. In the United States, for example, there are over one million elevators, many of which require POTS line replacement.

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ZTP (Zero Touch Provisioning) means that after a CPE device is powered on, it automatically contacts a cloud platform to obtain SIP account configuration information, allowing the device to operate without any local manual configuration.

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As the telecommunications industry continues retiring copper networks, organizations across North America are facing a growing challenge: how to maintain reliable analog communications for critical systems without depending on legacy POTS lines. For small deployments, replacing one or two analog lines may seem straightforward. But many real-world environments — such as healthcare facilities, schools, utility substations, apartment complexes, industrial sites, and transportation infrastructure —

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​For decades, analog communication infrastructure followed a simple operational model: install the line, test it occasionally, and hope it continues working. This approach existed largely because traditional POTS networks were maintained by telecom carriers themselves. Businesses relied on the assumption that the underlying infrastructure would remain stable, powered, and available. When something failed, responsibility typically fell back to the carrier.

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Most POTS replacement solutions on the market today support only 1–8 PSTN lines. This creates significant deployment challenges in environments such as apartment complexes, universities, and senior living communities, where dozens—or even more than 100—PSTN lines are required.

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