Home phone dropping after 30 minutes

I did receive a call back the other day that they were able to reproduce the issue on a test line in their office but no resolution yet. I asked about the modem and was told that changing the modem may not make a difference since it's more of where your number lives in their network vs the model (maybe, maybe not). I'm not too exciting about swapping my modem out just to see if it fixes it or not and creating another issue so trying to wait this out. There is a note on my account to call back about a credit once the issue is resolved. I'll give them a 1-2 weeks and call back again to see if there is any progress. I really wish they would make the call agents aware vs sending out tech after tech for no reason.

I have been having the same issue for weeks. Calls drop at exactly 30 minutes. It is not the batteries. I thought it was the phones and we went and purchased brand new phones made sure they were charged. Calls still drop. We have the Eu2251 modem as well. I will check to see if I can get it swapped to see if it fixes the issue.

The en2251 has known issues with internet service, probably want to avoid that one as well. I talked with a tech supervisor again in Thursday about the issue and it’s starting to pop up everywhere now.

My ATT cordless landline drops outgoing calls at 31 minutes. Incoming calls to my ATT cordless landline don’t drop. I contacted Spectrum on 11/7/23. They said it’s a known issue in the east coast. They don’t have a resolution at the moment. I’m in Orange County, California. My modem is an EU2251 that I just got this year. I’ve restarted modem and router numerous times. ATT cordless phone is brand new. My previous phone was replaced because I thought that was the issue. Please assist. Thanks.

My issue was finally fixed this past Friday but only after the modem was replaced with another model. My issue started in July after the modem had been installed for 3 years without any issues. After working with one of their voice engineers best I can gather is they have some type of routing issues within their network that is not going to be a quick fix, I was trying to wait it out for a fix on the EU model since that is one of (if not) the best modem they currently have but when the voice engineer told the tech to replace the modem with another model that told me the fix wasn't coming soon. Best I gather from this ordeal is that the EU2251 is an ipv6 modem and the ET2251 is an ipv4 modem. When a voice call is initiated, a SIP Re-Invite occurs every 15 minutes that keeps the call connected, when there is no re-invite the call drops 15 minutes later. To me this sounds like internal network/routing/firewall issues within the spectrum network related to ipv6 with their voice services. I requested the ET2251 model (avoid the EN2251 - https://lookgadgets.com/articles/intel-puma-modems-list/). Supervisor came out and replaced the modem on Friday and we made a test call, and the call did not drop after 30 minutes. I had seen a reddit post a few days ago where someone mentioned that ubee has provided new firmware that caused the issue with the EU model but that post has since been deleted so not sure if that is true or not but it's clear that something changed recently specific to either the EU2251 itself or ipv6 on their network.