D-Link:
64 bytes from 192.168.0.134: icmp_seq=1 ttl=64 time=3.05 ms power management off
64 bytes from 192.168.0.134: icmp_seq=2 ttl=64 time=3.71 ms
64 bytes from 192.168.0.134: icmp_seq=3 ttl=64 time=5.84 ms
64 bytes from 192.168.0.134: icmp_seq=4 ttl=64 time=5.83 ms
64 bytes from 192.168.0.134: icmp_seq=5 ttl=64 time=5.80 ms
64 bytes from 192.168.0.134: icmp_seq=6 ttl=64 time=4.55 ms
64 bytes from 192.168.0.134: icmp_seq=7 ttl=64 time=5.28 ms
64 bytes from 192.168.0.134: icmp_seq=8 ttl=64 time=4.22 ms
64 bytes from 192.168.0.134: icmp_seq=9 ttl=64 time=4.24 ms
64 bytes from 192.168.0.134: icmp_seq=10 ttl=64 time=3.28 ms
64 bytes from 192.168.0.134: icmp_seq=11 ttl=64 time=4.78 ms
64 bytes from 192.168.0.134: icmp_seq=12 ttl=64 time=5.53 ms
64 bytes from 192.168.0.134: icmp_seq=13 ttl=64 time=3.72 ms 
64 bytes from 192.168.0.134: icmp_seq=14 ttl=64 time=144 ms power management on
64 bytes from 192.168.0.134: icmp_seq=15 ttl=64 time=169 ms
64 bytes from 192.168.0.134: icmp_seq=16 ttl=64 time=193 ms
64 bytes from 192.168.0.134: icmp_seq=17 ttl=64 time=113 ms
64 bytes from 192.168.0.134: icmp_seq=18 ttl=64 time=138 ms
64 bytes from 192.168.0.134: icmp_seq=19 ttl=64 time=163 ms
64 bytes from 192.168.0.134: icmp_seq=20 ttl=64 time=183 ms
64 bytes from 192.168.0.134: icmp_seq=21 ttl=64 time=204 ms
64 bytes from 192.168.0.134: icmp_seq=22 ttl=64 time=125 ms
64 bytes from 192.168.0.134: icmp_seq=23 ttl=64 time=146 ms
64 bytes from 192.168.0.134: icmp_seq=24 ttl=64 time=173 ms
64 bytes from 192.168.0.134: icmp_seq=25 ttl=64 time=197 ms
64 bytes from 192.168.0.134: icmp_seq=26 ttl=64 time=18.7 ms power management off
64 bytes from 192.168.0.134: icmp_seq=27 ttl=64 time=2.71 ms
64 bytes from 192.168.0.134: icmp_seq=28 ttl=64 time=2.65 ms
64 bytes from 192.168.0.134: icmp_seq=29 ttl=64 time=7.61 ms
64 bytes from 192.168.0.134: icmp_seq=30 ttl=64 time=4.39 ms
64 bytes from 192.168.0.134: icmp_seq=31 ttl=64 time=2.77 ms
64 bytes from 192.168.0.134: icmp_seq=32 ttl=64 time=2.68 ms
64 bytes from 192.168.0.134: icmp_seq=33 ttl=64 time=2.70 ms
64 bytes from 192.168.0.134: icmp_seq=34 ttl=64 time=2.21 ms
64 bytes from 192.168.0.134: icmp_seq=35 ttl=64 time=5.00 ms

Zyxel (with no DSL connection present):

power management off:
root@ubuntu710vm:~# ping 192.168.1.35
PING 192.168.1.35 (192.168.1.35) 56(84) bytes of data.
64 bytes from 192.168.1.35: icmp_seq=1 ttl=64 time=4.58 ms
64 bytes from 192.168.1.35: icmp_seq=2 ttl=64 time=4.28 ms
64 bytes from 192.168.1.35: icmp_seq=3 ttl=64 time=3.66 ms
64 bytes from 192.168.1.35: icmp_seq=4 ttl=64 time=4.29 ms

power management on:
--- 192.168.1.35 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 3.661/4.207/4.580/0.336 ms
root@ubuntu710vm:~# ping 192.168.1.35
PING 192.168.1.35 (192.168.1.35) 56(84) bytes of data.
64 bytes from 192.168.1.35: icmp_seq=6 ttl=64 time=3.19 ms
64 bytes from 192.168.1.35: icmp_seq=10 ttl=64 time=3.58 ms
64 bytes from 192.168.1.35: icmp_seq=14 ttl=64 time=7.42 ms
64 bytes from 192.168.1.35: icmp_seq=18 ttl=64 time=6.55 ms
64 bytes from 192.168.1.35: icmp_seq=22 ttl=64 time=5.33 ms

--- 192.168.1.35 ping statistics ---
22 packets transmitted, 5 received, 77% packet loss, time 21008ms
rtt min/avg/max/mdev = 3.199/5.220/7.427/1.637 ms
root@ubuntu710vm:~#