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How do I change my Mac's name on the network. Set Up an Automated, Bulletproof File Back Up Solution. Wi-Fi beats cellular for tablet connections. Modem losing connection/cycling - Comcast Help and Support Forums. I just went through the same issue. It took months to get it fixed. It did not take so long because of massive repairs; it took so long because I did not have a competent tech the first three times from Comcast. Here is my post from my thread a couple of days ago explaining what happened. BTW.... I have the same SB6121 modem. It's a good modem so don't blame it for your problems. . @ i-am-nerdberg - So the problem has been resolved. This had been escalated several times and other techs came out but they just put their meters on the line and said everything looked good. The last tech (John) that came out was on his way up the technical ladder @ CC and had been accepted for a position in Denver and he would be leaving in a few weeks.
He did two things when he was here. 1) He replaced the connectors on the lines comming into my building. 2) He could not see my modem from his Data Service Phone he carried so he did some checking. So the moral of this story is insist on a top technician. Free Home Inventory Software - What You Own. KOMANDO. iCloud - Learn how to set up iCloud on all your devices.