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 <mailto:[email protected]>
*Sent:* Wednesday, April 22, 2015 2:50 PM
*To:* [email protected] <mailto:[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.
