Highly unreliable connection for the past 4 days

I've been a comcast customer for several years now and I generally get a very reliable service. I attempted to switch from comcast to DSL and then came back and suddenly I've got a very unreliable connection. 

I am on 6mbs plan. When I run against a well known speed test site I get speeds I expect. When I run against an obscure site I get 700kbs speed (I used to get good speeds).

I observe that connection is up and grate for a minute and then nothing works for another 3 to 5 minutes.

I thought my router went bad, so I replaced it. Same results.

Vendor identification Zoom Telephonics Model Name 5341 DOCSIS mode DOCSIS 3.0 HW version 1A SW version 3.1.0.1pre3 Boot rom version

PSPU-Boot 1.0.9.15-H2.5

CM Configuration file name d11_m_5341_performancestarter_c01.cm Network Access

--- comcast.com ping statistics ---

349 packets transmitted, 333 packets received, 4.6% packet loss

round-trip min/avg/max/stddev = 42.945/10079.362/57972.273/13696.486 ms 

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64 bytes from 69.252.80.75: icmp_seq=35 ttl=55 time=57972.273 ms

64 bytes from 69.252.80.75: icmp_seq=37 ttl=55 time=56028.075 ms

64 bytes from 69.252.80.75: icmp_seq=36 ttl=55 time=57029.183 ms

64 bytes from 69.252.80.75: icmp_seq=40 ttl=55 time=53025.195 ms

64 bytes from 69.252.80.75: icmp_seq=39 ttl=55 time=54026.216 ms

64 bytes from 69.252.80.75: icmp_seq=38 ttl=55 time=55027.234 ms

64 bytes from 69.252.80.75: icmp_seq=41 ttl=55 time=52026.013 ms

64 bytes from 69.252.80.75: icmp_seq=42 ttl=55 time=51025.691 ms

64 bytes from 69.252.80.75: icmp_seq=43 ttl=55 time=50026.290 ms

64 bytes from 69.252.80.75: icmp_seq=48 ttl=55 time=46960.557 ms

64 bytes from 69.252.80.75: icmp_seq=44 ttl=55 time=50964.626 ms

64 bytes from 69.252.80.75: icmp_seq=49 ttl=55 time=45960.872 ms

64 bytes from 69.252.80.75: icmp_seq=45 ttl=55 time=49963.825 ms

64 bytes from 69.252.80.75: icmp_seq=47 ttl=55 time=47962.469 ms

64 bytes from 69.252.80.75: icmp_seq=46 ttl=55 time=48962.919 ms

64 bytes from 69.252.80.75: icmp_seq=57 ttl=55 time=38005.909 ms

64 bytes from 69.252.80.75: icmp_seq=51 ttl=55 time=44010.852 ms

64 bytes from 69.252.80.75: icmp_seq=56 ttl=55 time=39006.616 ms

64 bytes from 69.252.80.75: icmp_seq=58 ttl=55 time=37005.806 ms

64 bytes from 69.252.80.75: icmp_seq=52 ttl=55 time=43010.170 ms

64 bytes from 69.252.80.75: icmp_seq=59 ttl=55 time=36005.360 ms

64 bytes from 69.252.80.75: icmp_seq=53 ttl=55 time=42010.078 ms

64 bytes from 69.252.80.75: icmp_seq=55 ttl=55 time=40008.062 ms

64 bytes from 69.252.80.75: icmp_seq=50 ttl=55 time=45013.474 ms

64 bytes from 69.252.80.75: icmp_seq=60 ttl=55 time=35006.391 ms

64 bytes from 69.252.80.75: icmp_seq=54 ttl=55 time=41009.391 ms

64 bytes from 69.252.80.75: icmp_seq=62 ttl=55 time=33165.366 ms

64 bytes from 69.252.80.75: icmp_seq=63 ttl=55 time=32165.560 ms

64 bytes from 69.252.80.75: icmp_seq=61 ttl=55 time=34167.869 ms

64 bytes from 69.252.80.75: icmp_seq=71 ttl=55 time=24420.366 ms

64 bytes from 69.252.80.75: icmp_seq=67 ttl=55 time=28422.706 ms

64 bytes from 69.252.80.75: icmp_seq=72 ttl=55 time=23419.874 ms

64 bytes from 69.252.80.75: icmp_seq=65 ttl=55 time=30424.484 ms

64 bytes from 69.252.80.75: icmp_seq=69 ttl=55 time=26423.059 ms

64 bytes from 69.252.80.75: icmp_seq=66 ttl=55 time=29424.362 ms

64 bytes from 69.252.80.75: icmp_seq=68 ttl=55 time=27423.828 ms

64 bytes from 69.252.80.75: icmp_seq=73 ttl=55 time=22421.192 ms

64 bytes from 69.252.80.75: icmp_seq=64 ttl=55 time=31426.101 ms

64 bytes from 69.252.80.75: icmp_seq=70 ttl=55 time=25423.466 ms

64 bytes from 69.252.80.75: icmp_seq=81 ttl=55 time=14438.095 ms

64 bytes from 69.252.80.75: icmp_seq=77 ttl=55 time=18439.643 ms

64 bytes from 69.252.80.75: icmp_seq=74 ttl=55 time=21442.216 ms

64 bytes from 69.252.80.75: icmp_seq=82 ttl=55 time=13439.306 ms

64 bytes from 69.252.80.75: icmp_seq=84 ttl=55 time=11437.623 ms

64 bytes from 69.252.80.75: icmp_seq=80 ttl=55 time=15439.956 ms

64 bytes from 69.252.80.75: icmp_seq=86 ttl=55 time=9436.493 ms

64 bytes from 69.252.80.75: icmp_seq=78 ttl=55 time=17441.131 ms

64 bytes from 69.252.80.75: icmp_seq=75 ttl=55 time=20442.610 ms

64 bytes from 69.252.80.75: icmp_seq=79 ttl=55 time=16440.168 ms

64 bytes from 69.252.80.75: icmp_seq=83 ttl=55 time=12438.715 ms

64 bytes from 69.252.80.75: icmp_seq=88 ttl=55 time=7436.034 ms

64 bytes from 69.252.80.75: icmp_seq=85 ttl=55 time=10436.725 ms

64 bytes from 69.252.80.75: icmp_seq=89 ttl=55 time=6435.914 ms

64 bytes from 69.252.80.75: icmp_seq=76 ttl=55 time=19442.704 ms

64 bytes from 69.252.80.75: icmp_seq=87 ttl=55 time=8436.491 ms

64 bytes from 69.252.80.75: icmp_seq=90 ttl=55 time=5435.639 ms

64 bytes from 69.252.80.75: icmp_seq=92 ttl=55 time=3433.516 ms

64 bytes from 69.252.80.75: icmp_seq=91 ttl=55 time=4435.104 ms

64 bytes from 69.252.80.75: icmp_seq=93 ttl=55 time=2434.043 ms

64 bytes from 69.252.80.75: icmp_seq=95 ttl=55 time=438.585 ms

64 bytes from 69.252.80.75: icmp_seq=94 ttl=55 time=1440.409 ms

64 bytes from 69.252.80.75: icmp_seq=96 ttl=55 time=2331.811 ms

64 bytes from 69.252.80.75: icmp_seq=97 ttl=55 time=1332.645 ms

64 bytes from 69.252.80.75: icmp_seq=98 ttl=55 time=332.798 ms

64 bytes from 69.252.80.75: icmp_seq=99 ttl=55 time=44.436 ms

64 bytes from 69.252.80.75: icmp_seq=100 ttl=55 time=3511.928 ms

64 bytes from 69.252.80.75: icmp_seq=101 ttl=55 time=2524.292 ms

64 bytes from 69.252.80.75: icmp_seq=103 ttl=55 time=13857.440 ms

64 bytes from 69.252.80.75: icmp_seq=102 ttl=55 time=14857.664 ms

64 bytes from 69.252.80.75: icmp_seq=104 ttl=55 time=13016.666 ms

64 bytes from 69.252.80.75: icmp_seq=105 ttl=55 time=13455.211 ms

64 bytes from 69.252.80.75: icmp_seq=106 ttl=55 time=12455.035 ms

64 bytes from 69.252.80.75: icmp_seq=107 ttl=55 time=11454.966 ms

64 bytes from 69.252.80.75: icmp_seq=110 ttl=55 time=8483.260 ms

64 bytes from 69.252.80.75: icmp_seq=108 ttl=55 time=10485.109 ms

64 bytes from 69.252.80.75: icmp_seq=109 ttl=55 time=9484.814 ms

64 bytes from 69.252.80.75: icmp_seq=112 ttl=55 time=6608.601 ms

64 bytes from 69.252.80.75: icmp_seq=111 ttl=55 time=7610.426 ms

64 bytes from 69.252.80.75: icmp_seq=113 ttl=55 time=5608.808 ms

64 bytes from 69.252.80.75: icmp_seq=114 ttl=55 time=4609.354 ms

64 bytes from 69.252.80.75: icmp_seq=115 ttl=55 time=3608.373 ms

64 bytes from 69.252.80.75: icmp_seq=116 ttl=55 time=2608.394 ms

64 bytes from 69.252.80.75: icmp_seq=117 ttl=55 time=1607.383 ms

64 bytes from 69.252.80.75: icmp_seq=118 ttl=55 time=606.543 ms

64 bytes from 69.252.80.75: icmp_seq=119 ttl=55 time=554.439 ms

64 bytes from 69.252.80.75: icmp_seq=120 ttl=55 time=14639.021 ms

64 bytes from 69.252.80.75: icmp_seq=121 ttl=55 time=13638.256 ms

64 bytes from 69.252.80.75: icmp_seq=122 ttl=55 time=12637.228 ms

64 bytes from 69.252.80.75: icmp_seq=123 ttl=55 time=11637.056 ms

64 bytes from 69.252.80.75: icmp_seq=124 ttl=55 time=10636.578 ms

64 bytes from 69.252.80.75: icmp_seq=127 ttl=55 time=7657.881 ms

64 bytes from 69.252.80.75: icmp_seq=125 ttl=55 time=9661.431 ms

64 bytes from 69.252.80.75: icmp_seq=126 ttl=55 time=8660.307 ms

64 bytes from 69.252.80.75: icmp_seq=128 ttl=55 time=6658.319 ms

64 bytes from 69.252.80.75: icmp_seq=129 ttl=55 time=5658.166 ms

64 bytes from 69.252.80.75: icmp_seq=130 ttl=55 time=4750.852 ms

64 bytes from 69.252.80.75: icmp_seq=131 ttl=55 time=3749.829 ms

64 bytes from 69.252.80.75: icmp_seq=133 ttl=55 time=1749.870 ms

64 bytes from 69.252.80.75: icmp_seq=132 ttl=55 time=2750.040 ms

64 bytes from 69.252.80.75: icmp_seq=134 ttl=55 time=754.585 ms

64 bytes from 69.252.80.75: icmp_seq=135 ttl=55 time=2965.977 ms

64 bytes from 69.252.80.75: icmp_seq=136 ttl=55 time=1981.068 ms

64 bytes from 69.252.80.75: icmp_seq=137 ttl=55 time=980.659 ms

64 bytes from 69.252.80.75: icmp_seq=138 ttl=55 time=1441.525 ms

64 bytes from 69.252.80.75: icmp_seq=139 ttl=55 time=447.112 ms

64 bytes from 69.252.80.75: icmp_seq=140 ttl=55 time=3832.956 ms

64 bytes from 69.252.80.75: icmp_seq=141 ttl=55 time=4801.186 ms

64 bytes from 69.252.80.75: icmp_seq=142 ttl=55 time=4004.321 ms

64 bytes from 69.252.80.75: icmp_seq=143 ttl=55 time=3292.252 ms

64 bytes from 69.252.80.75: icmp_seq=144 ttl=55 time=2542.530 ms

64 bytes from 69.252.80.75: icmp_seq=145 ttl=55 time=1553.137 ms

64 bytes from 69.252.80.75: icmp_seq=146 ttl=55 time=706.266 ms

64 bytes from 69.252.80.75: icmp_seq=147 ttl=55 time=7415.711 ms

64 bytes from 69.252.80.75: icmp_seq=148 ttl=55 time=6918.906 ms

64 bytes from 69.252.80.75: icmp_seq=149 ttl=55 time=6586.136 ms

64 bytes from 69.252.80.75: icmp_seq=150 ttl=55 time=7011.167 ms

64 bytes from 69.252.80.75: icmp_seq=151 ttl=55 time=6461.208 ms

64 bytes from 69.252.80.75: icmp_seq=152 ttl=55 time=5613.070 ms

64 bytes from 69.252.80.75: icmp_seq=153 ttl=55 time=5445.211 ms

64 bytes from 69.252.80.75: icmp_seq=154 ttl=55 time=4977.252 ms

64 bytes from 69.252.80.75: icmp_seq=155 ttl=55 time=5676.115 ms

64 bytes from 69.252.80.75: icmp_seq=156 ttl=55 time=4969.117 ms

64 bytes from 69.252.80.75: icmp_seq=157 ttl=55 time=4489.221 ms

64 bytes from 69.252.80.75: icmp_seq=158 ttl=55 time=3778.590 ms

64 bytes from 69.252.80.75: icmp_seq=159 ttl=55 time=3290.373 ms

64 bytes from 69.252.80.75: icmp_seq=160 ttl=55 time=3630.540 ms

64 bytes from 69.252.80.75: icmp_seq=161 ttl=55 time=3728.431 ms

64 bytes from 69.252.80.75: icmp_seq=162 ttl=55 time=3412.818 ms

64 bytes from 69.252.80.75: icmp_seq=163 ttl=55 time=3837.699 ms

64 bytes from 69.252.80.75: icmp_seq=164 ttl=55 time=3823.857 ms

64 bytes from 69.252.80.75: icmp_seq=165 ttl=55 time=4301.233 ms

64 bytes from 69.252.80.75: icmp_seq=166 ttl=55 time=5275.730 ms

64 bytes from 69.252.80.75: icmp_seq=167 ttl=55 time=4352.157 ms

64 bytes from 69.252.80.75: icmp_seq=168 ttl=55 time=3443.452 ms

64 bytes from 69.252.80.75: icmp_seq=169 ttl=55 time=2529.415 ms

64 bytes from 69.252.80.75: icmp_seq=170 ttl=55 time=1593.180 ms

64 bytes from 69.252.80.75: icmp_seq=171 ttl=55 time=619.629 ms

64 bytes from 69.252.80.75: icmp_seq=172 ttl=55 time=45.226 ms

64 bytes from 69.252.80.75: icmp_seq=173 ttl=55 time=132.044 ms

64 bytes from 69.252.80.75: icmp_seq=174 ttl=55 time=81.194 ms

64 bytes from 69.252.80.75: icmp_seq=175 ttl=55 time=132.689 ms

64 bytes from 69.252.80.75: icmp_seq=176 ttl=55 time=173.475 ms

64 bytes from 69.252.80.75: icmp_seq=177 ttl=55 time=347.000 ms

64 bytes from 69.252.80.75: icmp_seq=178 ttl=55 time=304.619 ms

64 bytes from 69.252.80.75: icmp_seq=179 ttl=55 time=259.259 ms

64 bytes from 69.252.80.75: icmp_seq=180 ttl=55 time=70.388 ms

64 bytes from 69.252.80.75: icmp_seq=181 ttl=55 time=156.295 ms

64 bytes from 69.252.80.75: icmp_seq=182 ttl=55 time=200.077 ms

64 bytes from 69.252.80.75: icmp_seq=183 ttl=55 time=258.412 ms

64 bytes from 69.252.80.75: icmp_seq=184 ttl=55 time=264.490 ms

64 bytes from 69.252.80.75: icmp_seq=185 ttl=55 time=280.459 ms

64 bytes from 69.252.80.75: icmp_seq=186 ttl=55 time=184.078 ms

64 bytes from 69.252.80.75: icmp_seq=187 ttl=55 time=226.695 ms

64 bytes from 69.252.80.75: icmp_seq=188 ttl=55 time=246.156 ms

64 bytes from 69.252.80.75: icmp_seq=189 ttl=55 time=312.156 ms

64 bytes from 69.252.80.75: icmp_seq=190 ttl=55 time=349.443 ms

64 bytes from 69.252.80.75: icmp_seq=191 ttl=55 time=405.113 ms

64 bytes from 69.252.80.75: icmp_seq=192 ttl=55 time=417.720 ms

64 bytes from 69.252.80.75: icmp_seq=193 ttl=55 time=313.349 ms

64 bytes from 69.252.80.75: icmp_seq=194 ttl=55 time=252.152 ms

64 bytes from 69.252.80.75: icmp_seq=195 ttl=55 time=276.246 ms

64 bytes from 69.252.80.75: icmp_seq=196 ttl=55 time=153.657 ms

64 bytes from 69.252.80.75: icmp_seq=197 ttl=55 time=163.050 ms

64 bytes from 69.252.80.75: icmp_seq=198 ttl=55 time=211.572 ms

64 bytes from 69.252.80.75: icmp_seq=199 ttl=55 time=230.929 ms

64 bytes from 69.252.80.75: icmp_seq=200 ttl=55 time=277.011 ms

64 bytes from 69.252.80.75: icmp_seq=201 ttl=55 time=312.197 ms

64 bytes from 69.252.80.75: icmp_seq=202 ttl=55 time=334.814 ms

64 bytes from 69.252.80.75: icmp_seq=203 ttl=55 time=187.093 ms

64 bytes from 69.252.80.75: icmp_seq=204 ttl=55 time=145.029 ms

64 bytes from 69.252.80.75: icmp_seq=205 ttl=55 time=191.751 ms

64 bytes from 69.252.80.75: icmp_seq=206 ttl=55 time=215.847 ms

64 bytes from 69.252.80.75: icmp_seq=207 ttl=55 time=266.619 ms

64 bytes from 69.252.80.75: icmp_seq=208 ttl=55 time=302.441 ms

64 bytes from 69.252.80.75: icmp_seq=209 ttl=55 time=1605.211 ms

64 bytes from 69.252.80.75: icmp_seq=210 ttl=55 time=4158.271 ms

64 bytes from 69.252.80.75: icmp_seq=211 ttl=55 time=5217.581 ms

64 bytes from 69.252.80.75: icmp_seq=212 ttl=55 time=6714.635 ms