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2. Small Business Phone System: A Guide to Service Types ... - AOL

   www.aol.com/small-business-phone-system-guide...

   Virtual vs. VoIP: A virtual phone system is a type of VoIP. It forwards calls to an existing phone number, like a cell phone, landline, or, in some cases, another VoIP number.

3. 10 Phone Systems for Small Businesses - AOL

   www.aol.com/10-phone-systems-small-businesses...

   8x8's cloud-based phone system offers phone number support in over 100 countries, allowing small businesses to establish a presence with local numbers even if they don't have a physical office in ...

4. Virtual number - Wikipedia

   en.wikipedia.org/wiki/Virtual_number

   Virtual numbers faced popularity due to the growing trend of remote working, as it allows for employees to make and receive calls as their businesses' phone number remotely. It is especially popular in small businesses, startups or businesses with remote workers using virtual numbers to manage their inbound and outbound calling.

5. List of TCP and UDP port numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

   The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...

6. Network address translation - Wikipedia

   en.wikipedia.org/wiki/Network_address_translation

   For publicly accessible services such as web and mail servers the port number is important. For example, port 443 connects through a socket to the web server software and port 465 to a mail server's SMTP daemon. [7] The IP address of a public server is also important, similar in global uniqueness to a postal address or telephone number. Both IP ...

7. Voice over IP - Wikipedia

   en.wikipedia.org/wiki/Voice_over_IP

   Asterisk-based PBX for small business. In the case of a private VoIP system, the primary telephony system itself is located within the private infrastructure of the end-user organization. Usually, the system will be deployed on-premises at a site within the direct control of the organization.