I saw articles basically saying T-Mobile did it because their coverage sucks so bad.
Also, I thought I saw where T-Mobile femtocells are free for the asking? From: Bill Prince Sent: Wednesday, April 22, 2015 3:24 PM To: [email protected] Subject: Re: [AFMUG] Cambium System Release 13.4 Beta - Now Available! Don't know exactly what it is, but it sounds like it is WiFi calling through his cell phone. I think T-Mobile went this route instead of selling femtocells to all their subscribers. Probably a smarter solution than a femtocell in the long run anyway; at least it's simpler. Yes, it's double-NAT, but we always put the subscriber's router on the DMZ, so it's technically NAT without PAT. That configuration usually solves the NAT traversal issues that we see. bp <part15sbs{at}gmail{dot}com> On 4/22/2015 1:17 PM, Ken Hohhof wrote: Is this with the Personal CellSpot, or just WiFi calling? I would speculate WiFi calling uses a VPN and there is a NAT traversal issue. Is this double NAT (i.e. the customer has a NAT router behind the SM)? From: Bill Prince Sent: Wednesday, April 22, 2015 2:50 PM To: [email protected] Subject: Re: [AFMUG] Cambium System Release 13.4 Beta - Now Available! I can't speak to the femtocell issue (yet), but we just tried a site with a T-mobile "WiFi calling" feature that still does not work when the SM is in NAT mode (it does work in bridge mode). Speculation was that T-mobile's WiFi calling was having the same packet fragmentation issue that has always plagued femtocells, but this is apparently not the case. We only have one subscriber with T-mobile (they have lousy coverage in this area, so they are not a common cell-phone choice). What's the best way to figure out what the issue is? bp <part15sbs{at}gmail{dot}com> On 4/17/2015 8:15 AM, Jonathan Mandziara wrote: Bill, That fix was pulled into the PMP100 load line for 13.4. Can you try it on your PMP100s and let us know if it is working satisfactory? Best, Cambium Jonathan From: Af [mailto:[email protected]] On Behalf Of Bill Prince Sent: Friday, April 17, 2015 9:03 AM To: [email protected] Subject: Re: [AFMUG] Cambium System Release 13.4 Beta - Now Available! What I'm talking about is the thing that breaks femtocells when the SM is in NAT mode. bp<part15sbs{at}gmail{dot}com> On 4/17/2015 6:44 AM, Bill Prince wrote: Not seeing anything about the packet fragmentation that breaks most femtocells. I know this was in the 13.2 release for PMP4x0, but did it ever make it into the PMP100? bp<part15sbs{at}gmail{dot}com> On 4/17/2015 6:32 AM, Matt Mangriotis wrote: This software also adds a LOT of new features to the PMP 100 platform, so try it out.
