Welche Anforderungen werden an VoIP gestellt?
Voraussetzungen für VoIP
- Erfassen Ihrer Anforderungen hinsichtlich Parallelität von Telefonie und Datenverarbeitungsaufkommen in Ihrem Netz.
- Erfassen Ihrer Infrastruktur (Verkabelung, Server, Firewall, Router, Switches)
- Erfassen Ihrer Internetanbindung und ggf.
- Erfassen Ihrer Sicherheitspolicy.
Welches Netzwerk Transportprotokoll wird beim Aufbau einer VoIP Verbindung verwendet?
Der eigentliche Transport der Daten erfolgt über das Real-Time Transport Protocol (RTP) oder SRTP und wird gesteuert durch das RealTime Control Protocol (RTCP). RTP verwendet zur Übertragung das User Datagram Protocol (UDP).
What is the difference between H323 protocol and UDP protocol?
Each endpoint or device supporting H.323 protocol has its own IP address. This internet protocol packets routing within networks is established via H.323 endpoint. UDP protocols are used to connect endpoints to gateways and gatekeeper and transmit media traffic.
What ports are used for H323 and SIP?
IP Ports and Protocols used by various vendors H.323 and SIP Devices: General H.323 and SIP Firewall issues and Protocols: The table above shows that H.323 and SIP require the use of specific static ports as well as a number of dynamic ports within the range 1024-65535.
What ports are used for TCP and UDP?
Ports 3230-3235 (TCP/UDP): Signaling and control for audio, call, video and data/FECC. Port 3603 (TCP): ViaVideo Web interface (ViaVideo users only) So, a typical H.323 call would use 2 TCP fixed ports (3230-3231) and 6 UDP fixed ports (3230-3235) during the call.
What is the bandwidth requirement of H323?
However, bandwidth requirement is met by few G.7XX codecs. By default, H.323 uses the G.711 codec with high bandwidth rate (about 64 kbit/s). However G.711 is considered to be outdated. Its sampling frequency (converting analog signal into digital signal) is only 8kHz, while G.722.1 has twice as high frequency (16kHz).