Gigaset Siemens A540 IP
I have created an extension with number 10003.
I have registered the A450IP with the SIP credentials of the extension.
I have connected the A540IP to an Ethernet port of my modem router ADSL.
The SIP registration is successful and I can successfully establish VOIP calls with extension
Exactly the same as the first test, except this: I connect the A540IP to the Ethernet port of a hotspot mobile 4G (Huawei Wifi 2 Pro E5885ls-93a) instead of to the modem router. The SIP registration fails.
Here is the full log for the first case (registration OK, modem router ADSL)
The IP address of the A540IP is 188.8.131.52
And here is the full log for the second case (registration KO, hotspot mobile)
The IP address of the A540IP is 184.108.40.206
- If I use the SIP accounts that I have with iptel.org or pbxes.org, the registration of the Gigaset is successful both with modem router and with hotspot mobile.
- If I use a SIP account that I have with a Dellmont provider (freevoipdeal), the registration of the Gigaset is successful with modem router but it fails with hotspot mobile (so, the Dellmont provider has the same behavior of my freepbx).
In conclusion, there is some settings in the PBX and in the hotspot mobile (and maybe in the Gigaset) that are not compatible. Since the registration is possible with some VOIP providers when the hotspot mobile is used, I would like that in the same conditions it would be possible also with my freepbx.
Which settings should I change in my Freepbx to solve this issue?
Note: since there are providers working well with the hotspot mobile and Gigaset Siemens, I don’t want to change anything in these devices. It must be possible to solve the problem in the settings of Freepbx and I want to solve the problem there.