inbound call IP phone not ringing v18

[reco326]

Hi all,
after the update from v16 to v18 I got a problem with my IP phone astraa 6755i. In detail when I try to call from my mobile phone or even from an internal extension to another (example 201 to 200) the phone with ext 200 doesn't ring and doesn't receive any call. Setting into the tab "forwarding rules" of the ext. 200 the value "forward internal end external call to mobile phone" after x sec works well. IP phone can call other extensions and do outbound calls without any kind of problems.
I have tried, as you can see, to update the phone firmware but nothing is changed

Attached is my Activity Log file.
Could you please let me know what I can do?

Thanks in advance

regards

Federico

P.S. If I use the new softphone on my laptop everything is working well (ex. ext 200 try to call softphone ext 207)

System is on AWS server with static public IP so I don't use STUN

phone firmware details

new

Attribute	Value
Firmware Information
Firmware Version	3.3.1.4305
Firmware Release Code	SIP
Boot Version	2.5.2.1010
Date/Time	Dec 16 2014 08:47:02

old

Attribute	Value
Firmware Information
Firmware Version	3.2.2.3109
Firmware Release Code	SIP
Boot Version	2.5.2.1010
Date/Time	May 28 2013 12:01:01

 

[VasilisV_3CX]

Hi @reco326,

Just as a refresher, if you have a look at the limitations of the Astraa 6755i on the EOL IP Phones page: https://www.3cx.com/sip-phones/aastra/

"Note that these phones can not be used from a remote location or in combination with a 3CX in the cloud." They are LAN only devices.

 

[reco326]

Ok, thanks for your prompt reply.
To be honest is not clear to me why they were working before the update.
Was this limitation introduced with the v18 update?
regards

 

[VasilisV_3CX]

Hi @reco326,

Was this limitation introduced with the v18 update?

No, it was always the same requirement and always required to be on the same LAN. Hence I'm not sure how it worked in the first place, but being an unsupported scenario now, I can't think of anything to get it working in the current set up.