[Connectivity] Still problem with T3 Timeouts, Zoom 5341J modem does not help.

As I detailed here: http://www.dslreports.com/forum/r28636746-Connectivity-SB6121-Reboots, I was having problems with T3 timeouts. They had mostly gone away, but now are back again. It seems to coincide with warmer weather. I read a number of places (including here) that the Zoom 5341J is more "tolerant" of T3 timeouts, so I thought I would try it, after a Motorola SB6141 did not help to improve things. Despite the reports of the Zoom being more "tolerant", it definitely is not, the modem is actually rebooting even more often than before. :( Of course, as to the source of the issue, Comcast has never been able to find out what is wrong in the first place. Time Priority Description Sat Apr 12 13:58:17 2014 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Sat Apr 12 13:58:11 2014 Critical (3) No Ranging Response received - T3 time-out;CM-MAC= Sat Apr 12 13:57:57 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sat Apr 12 13:57:25 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ... Sat Apr 12 13:27:47 2014 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Sat Apr 12 13:27:39 2014 Critical (3) No Ranging Response received - T3 time-out;CM-MAC= Sat Apr 12 13:27:29 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sat Apr 12 13:26:56 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ... Sat Apr 12 13:22:02 2014 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Sat Apr 12 13:21:51 2014 Critical (3) No Ranging Response received - T3 time-out;CM-MAC= Sat Apr 12 13:21:36 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sat Apr 12 13:21:04 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ... Sat Apr 12 13:18:13 2014 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Sat Apr 12 13:18:03 2014 Critical (3) No Ranging Response received - T3 time-out;CM-MAC= Sat Apr 12 13:17:44 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sat Apr 12 13:17:11 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ... Sat Apr 12 13:11:00 2014 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Sat Apr 12 13:10:44 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sat Apr 12 13:10:11 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ... Sat Apr 12 12:57:17 2014 Notice (6) Honoring MDD; IP provisioning mode = IPv6 Sat Apr 12 12:57:11 2014 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=. Sat Apr 12 12:56:59 2014 Critical (3) Received Response to Broadcast Maintenance Request, But no Un... Sat Apr 12 12:56:26 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - ... [att=1] -- Reality is the leading cause of stress among those who are in touch with it.--Jane Wagner