1-way telephone with 2-way Fast Ethernet Network 2-way telephone with 2-way Fast Ethernet Network 4-way telephone with 2-way Fast Ethernet Network 8-way telephone with 2-way Fast Ethernet Network 1-way telephone with 2-way Gigabit Network 2-way telephone with 2-way Gigabit Network 2-way telephone with 2-way Gigabit Network 2-way Telephone with 2-way Gigabit Network 2-way Telephone with 2-way Gigabit Network