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In modern telephony, a phone number is not the same thing as a device or cable. A number can be routed by a provider to a SIP account, PBX, softphone or physical handset and then forwarded again.
That makes many things possible, but also confusing if nobody knows where the number is registered or which settings determine how calls are routed.
VoIP is telephony over IP networks. SIP is a widely used protocol for establishing calls and registrations. The audio itself may use other media protocols. A SIP account is therefore not the same thing as the telephone number or device.
A PBX routes calls between numbers, devices and functions such as voicemail, menus, groups and time schedules. It can run locally or as a hosted service. For one simple line, a PBX may be unnecessary.
Because the number, provider, SIP credentials, devices, forwarding rules and management accounts can all be with different parties. Record who holds the number and how recovery works before a fault or migration occurs.
Independence and technical continuity transparently explains that the relevant VoIP connections do not run through the foundation, but through a separate ACM-registered operation using the same name ASK-Solutions, including the current costs. That facility is a possible practical outcome, not the purpose of this explanation.
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