SIP initiates, maintains and terminates communication sessions for voice, video and messaging. Protocol is text-based, incorporating elements of HTTP and SMTP. Works with UDP, TCP and SCTP transport protocols. Uses SIP URIs with format sip:username@domainname or sips:username@hostport
Landline uses metal wires or optic fiber for telephone connections. Service provided through telephone company's central office's outside plant. Customer premises wiring extends from network interface to telephones
888 is a toll-free area code in North America. Not tied to any specific geographic location. Part of North American Numbering Plan
USA phone numbers consist of 3-digit area code and 7-digit local number. Exit code needed for international calls, "00" for Europe, "010" for Japan. Country code "1" required for international calls from outside USA. Area code determines geographic location, multiple codes possible in cities
Discord is a gaming communication platform offering VoIP streaming. Mic issues are common in VoIP applications like Discord. Users may hear others but not themselves during gameplay
Restart system and try Discord web version. Update Discord and check for server status. Verify PC configuration and Windows updates