Summary
Highlights
The video begins by outlining the simple topology consisting of a router (2811 series), a switch (2960 series), and two IP phones. It then walks through the process of dragging and dropping these devices onto the working area in Cisco Packet Tracer and connecting them using appropriate cables. Initially, only one phone is recommended for connection during the setup phase.
The next step involves configuring the router. This includes enabling the interface (fa 0/0) and assigning an IP address (192.168.1.1) with a subnet mask. Following this, a DHCP server pool named 'voice' is configured to assign IP addresses to the phones, specifying the network address, default router, and option 150 for TFTP server IP address (192.168.1.1 for voice configuration).
The telephony service is then initialized on the router. Commands are entered to define the maximum number of directory numbers (Max-Dn 5) and maximum number of phones (Max-Ephones 5). The IP source address for the telephony service is set to 192.168.1.1 with port 2000. Automatic assignment of extension numbers is also enabled from 1 to 5.
The switch is configured to support a voice VLAN. The interface range (fa 0/0 / 1-5) is accessed, set to switchport mode access, and then the command 'switchport voice vlan 1' is used to define VLAN 1 for voice packets. This ensures proper handling of voice traffic by the switch.
One IP phone is connected to the switch, and its power adapter is attached. The router then configures the first phone's directory number (ephone-dn 1) with an extension (number 541). Subsequently, the second phone is connected, powered up, and configured with its directory number (ephone-dn 2) and extension number (542).
Finally, the functionality of the configured IP phones is tested. A call is initiated from one phone to the other by dialing its extension number (e.g., 541). The video demonstrates receiving and answering the call on the second phone, confirming that the IP telephony setup is successful and both phones can communicate with each other.