DSL keeps disconnecting and reconnecting.

hello....sorry huge wall of text actiontec gt724wg dsl modem keeps disconnecting , reconnecting every couple of hours.

have 2 mac's 1 wired , 1 wireless , ps3 , wii running on modem also.

have 1 house phone has dsl filter hooked , when phone used internet still works fine.

once 2009 , 2010 imac's disconnect internet/server 3-4 minutes later fix , work again.

called isp , got replacement modem same thing.

i've tried change dns dynamic static , didn't cure problem either.

i've tried turn upnp on didn't work either.

, when ran line test online test got rating.

here log of modem.

(gmt-06:00)23:59:32 sun jul 17 2011 syslog: no response dns request server 218.165.129.158 yet.
(gmt-06:00)00:00:50 mon jul 18 2011 udhcpd: sending ack 192.168.0.2
(gmt-06:00)00:00:50 mon jul 18 2011 udhcpd: add c4:2c:03:2b:e4:f5 192.168.0.2 86400
(gmt-06:00)00:00:54 mon jul 18 2011 syslog: no response dns request server 218.165.129.158 yet.
(gmt-06:00)00:00:56 mon jul 18 2011 syslog: no response dns request server 218.170.153.158 yet.
(gmt-06:00)00:00:56 mon jul 18 2011 syslog: dns servers tried, no response.
(gmt-06:00)00:07:33 mon jul 18 2011 syslog: no response dns request server 218.165.129.158 yet.

here screen shot of airport diagnostics when dsl goes out.

click enlarge.



i'm not sure if right place post hope can me.

 

which model router using?

 

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