When you call, you need to dial the phone number corresponding to the person's name. The signals are packetized and sent to the managing server, where the packet picks up the MAC address of the person you are calling. Then the package is forwarded to the switch, the port and finally to the IP telephone connevted to the port. The phone rings and when the coworker picks up the phone, a virtual connection is established between the coworker and yourself for the life of the call. IP telephony does all of this at lightning speed.
6.Making External Calls:
It use the same way but because the coworker is connected to a different LAN, the local server sneds the call not to a switch located on your LAN but through your WAN. Now IP telephony technically becomes VoIP. Your call begins as an Ip telephony call on your LAN. It then travels from your LAN through a gateway, switch or router that is programmed to re-packetize your call and encode the VoIP packet with additional information, such as the address for the destination LAN.
No comments:
Post a Comment