MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 48000
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 48000
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 1920 kbps (240 KBytes/s) @ 200ms
Your RcvWindow limits you to: 768 kbps (96 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 106 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00001000
Precedence (priority) = 000 (routine)
Delay = 0 (normal delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 0 (normal cost)

こんな感じ〜。
これってちゃんとなってると思うんだけど。