Down RATE 4096 kbps
Down SNR Margin 7.0dB
UP RATE 800kb
MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1448, which is less than MSS because of Timestamps, or other TCP/IP options used.

Default Receive Window (RWIN) = 61320
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 61320
RWIN is 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: 2452.8 kbps (306.6 KBytes/s) @ 200ms
Your RcvWindow limits you to: 981.12 kbps (122.64 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 113 hops
TTL value is ok.

Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

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)

測定サイト http://speed.on.arena.ne.jp/ v2.0.7
測定時刻 2001/11/20 00:33:14
回線種類/線路長 ADSL/1.0km
キャリア/プロバイダ ACCA 8Mbps/so-net
ホスト1 WebArena 1.03Mbps(539kB,4.2秒)
ホスト2 fas.ne.jp 1.42Mbps(195kB,1.1秒)
推定スループット 1.42Mbps(178kB/s)
コメント ACCA 8Mbpsとしては少し遅いですが収容局からの距離が2km以上であれば問題ありません。(4/5)

この時間でこれって普通ですか？
MTU等の調整について意見お願いします。