This is strange, whenever I reset my Cisco 7960G IP phone from the telnet interface, when the phone comes back up it sends a steady stream of TCP ACK packets to my workstation:

12:31:38.380373 IP 10.3.5.104.23 > 10.3.5.107.47447: Flags [.], ack 1, win 1400, length 0
12:31:38.380385 IP 10.3.5.107.47447 > 10.3.5.104.23: Flags [R], seq 1654266114, win 0, length 0
12:31:38.400391 IP 10.3.5.104.23 > 10.3.5.107.47447: Flags [.], ack 1, win 1400, length 0
12:31:38.400400 IP 10.3.5.107.47447 > 10.3.5.104.23: Flags [R], seq 1654266114, win 0, length 0
12:31:38.420410 IP 10.3.5.104.23 > 10.3.5.107.47447: Flags [.], ack 1, win 1400, length 0
12:31:38.420422 IP 10.3.5.107.47447 > 10.3.5.104.23: Flags [R], seq 1654266114, win 0, length 0
12:31:38.440379 IP 10.3.5.104.23 > 10.3.5.107.47447: Flags [.], ack 1, win 1400, length 0
12:31:38.440393 IP 10.3.5.107.47447 > 10.3.5.104.23: Flags [R], seq 1654266114, win 0, length 0
12:31:38.460447 IP 10.3.5.104.23 > 10.3.5.107.47447: Flags [.], ack 1, win 1400, length 0
12:31:38.460460 IP 10.3.5.107.47447 > 10.3.5.104.23: Flags [R], seq 1654266114, win 0, length 0

(10.3.5.104 is the phone, and 10.3.5.107 is my workstation)

Resetting the phone by the buttons (hold down *, 6, and settings) breaks it out of this loop.

Weird.

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