一応回数を多めにPINGとってみたんだけど、DTIって広告で語るほど回線の質がよくないと思うのだけど、いかがでしょ？
アクセスポイントは東京ISDN専用１です。

uesday＠｀ October 31＠｀ 2000 09:40:19PM

Ping host www.jpix.co.jp

Timeout 15
Delay between packets 1000
Packet size 64
Number of Pings 20

# Address Host Name Msg Type TTL Time
1 210.171.225.81 www1.jpix.co.jp Echo Reply 248 121 ms
2 210.171.225.81 www1.jpix.co.jp Echo Reply 248 80 ms
3 210.171.225.81 www1.jpix.co.jp Echo Reply 248 90 ms
4 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
5 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
6 210.171.225.81 www1.jpix.co.jp Echo Reply 248 121 ms
7 210.171.225.81 www1.jpix.co.jp Echo Reply 248 130 ms
8 210.171.225.81 www1.jpix.co.jp Echo Reply 248 130 ms
9 210.171.225.81 www1.jpix.co.jp Echo Reply 248 90 ms
10 210.171.225.81 www1.jpix.co.jp Echo Reply 248 90 ms
11 No response
12 210.171.225.81 www1.jpix.co.jp Echo Reply 248 121 ms
13 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
14 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
15 210.171.225.81 www1.jpix.co.jp Echo Reply 248 121 ms
16 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
17 210.171.225.81 www1.jpix.co.jp Echo Reply 248 90 ms
18 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
19 210.171.225.81 www1.jpix.co.jp Echo Reply 248 120 ms
20 210.171.225.81 www1.jpix.co.jp Echo Reply 248 131 ms

Statistics: Out 20＠｀ in 19＠｀ loss 5%＠｀ times (min/avg/max) 80/113/131