Primary Rate Interface (PRI) is a T-1 transmission technology that has been widely used to support voice communications for over 50 years. It’s an interface standard used to deliver multiple lines of voice and data through physical copper lines that are part of your building’s physical infrastructure.
Your phone service includes a 411 and White Pages directory listing (simple, straight-line listing) for new phone number(s). A 411 and White Pages directory listing for your toll-free numbers is optional and provided at an additional charge.

The U.S.-based Ring Central offers a substantial amount of call features and the most bells and whistles for the money. The base model "Standard Plan" offers call management, mobile apps for both iOS and Android, unlimited calling and conference calling, 1,000 toll-free minutes, unlimited business SMS, unlimited video conferencing for up to four connections, log reports, and multi-level auto-attendants for a monthly fee of $24.99 per user. The popular "Premium Plan" upgrades the number of toll-free minutes to 2,500, increases the video conference capacity to 50, and adds custom application development/deployment, caller ID, automatic call recording, smart integration with systems like Salesforce and Zendesk.
The pandemic has hit most VoIP installations very hard. That's because what we've discussed above has been mainly about optimizing one network, namely your primary office network, for VoIP traffic. Those steps mean significant work and time, both for your VoIP vendor's engineers as well as your IT staff.