... /100mbps Ethernet ports, 2 USB (2.0) host ports, 2.5mm headset jack caller ID, call waiting, hold, transfer, for-ward, 1) SIP 2.0, TCP ... and SRV), DHCP, PPPoE, TFTP, NTP. 2)Dual 10/100mbps Ethernet ports, 2 USB (2.0) host ports, 2.5mm headset jack 3)Advanced Digital ... .6)Traditional voice features including caller ID, call waiting, hold, transfer, for-ward, block, mute, autodial, off-hook dial, and ...