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  1. Need help configuring a GrandStream HT881

    Thanks, but that is for FXS ports (extensions) and I'm doing FXO (trunks). The Grandstream documentation is poor at best for these and tech support is only via email. I've used the HT801's before without issue so that's why I picked the HT881 for this project but it just doesn't work. Maybe...
  2. How to do separate trunks / carriers for voice and SMS

    Thanks. Tried that though and it's not working. I directed the DID to a ring group and made sure it was the DID on the SMS trunk but instead of the text messages going to the people in the ring group, it went to an extension that isn't in the ring group. That test from from my cell phone...
  3. How to do separate trunks / carriers for voice and SMS

    Before update 5, it was easy to have one carrier for voice and another one for SMS. That way if one provider has an outage, you don't loose both inbound calls and SMS, you only loose one of them. We tried to get this to work in U5 and now in U6 but having problems with inbound routing where it...
  4. Solved AT&T iPhone users having problems registering when using 4G

    I figured it out. Really odd what AT&T is doing. If you go to a website on your cell phone that shows you your IPv4 address, it would show x.x.x.x (checked it on 3 different websites). But when I did a packet capture, I found that the 3CX Phone for IOS was coming in on y.y.y.y. I added that...
  5. Solved AT&T iPhone users having problems registering when using 4G

    Sorry, missed that part. I did check and allow cellular data is enabled for 3CX. It's just hung at connecting. But if I turn on WiFi it works fine. Also, if I install a VPN client on the phone it works fine on cellular. Also, I've tested another iPhone on Verizon and it works fine. This...
  6. Solved AT&T iPhone users having problems registering when using 4G

    jessicaNN_Tech posted incorrect info. That is a different issue we have seen before and unrelated to this issue. The problem here is that if you do a packet capture on the firewall in-front of the 3CX server, you don't see any traffic from the IPv4 address of the iPhone. This only happens...
  7. Solved AT&T iPhone users having problems registering when using 4G

    Hi all, Got an odd problem. We have a few iPhones that are on AT&T's and the 3CX for iOS works fine when they are connected to WiFi but when they are only on 4G, it won't work..doesn't register...just says "connecting." We have tried a packet capture on the firewall in-front of the 3CX server...
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