Sip Register failed on second phone

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mariyah

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I have setup two extensions.
Provisioned 2 phones, both exactly the same model, brand new.
Phone Models: Fanvil X3s Pro

The first extension works. Phone provisions fine.
When we provision the second phone, it says SIP Register Failed.
I checked all settings.
Then I added a second phone to the same extension that worked for the first phone.
Same issue; Sip register failed.

I added IP to allow list, same issue

The funny thing is, after a few days, I reset both phones, then I used the second phone first (the one that was showing SIP register failed upon auto provision) and that worked. It provisioned fine. Then I tried to provision the other one (the one that was working previously) then i got the error on there.

So it seems that I cant register two phones, for some reason. any thoughts?
Activity log:

Code:
02/15/2022 10:52:06 AM - [CM102001]: Authentication failed for AuthFail Recv Req REGISTER from 103masked0:10436 tid=1ce954a5-7196-4816-93a0-1d10de530615 Call-ID=xpmxemaskedaobpisefxsxsqhhjhgaxpvoofepwryrwlpy:
REGISTER sip:13.2masked52 SIP/2.0
Via: SIP/2.0/UDP 10.10.10.10:10436;branch=z9hG4bmaskede954a5-7196-4816-93a0-1d10de530615;rport=10436;received=103.1masked20
Max-Forwards: 70
Contact: <sip:[email protected]:10436;rinstance=46edmaskeda7c96e42>
To: "443"<sip:[email protected]>
From: "443"<sip:[email protected]>;tag=avdxhsjo
Call-ID: xpmxejmasmaskedobpisefxsxsqhhjhgaxpvoofepwryrwlpy
CSeq: 2 REGISTER
Expires: 3600
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE
Proxy-Authorization: Digest username="443",realm="3CXPhoneSystem",nonce="414d5359620b69masked0f24e277553affafe6",response="ea597da57d5c04f05c3maskede8ad1fb",uri="sip:13.24masked52",algorithm=MD5
Supported: 100rel
User-Agent: PolycomVVX-VVX_401-UA5.4.1.18405
Content-Length: 0

; Reason: Credentials don't match, check that authorization-ID and password match the ones in extension settings
 
You should be able to provision the same extension on two different IP Phones without issues provided you're not using Hotdesking.

Something doesn't seem right in the logs you provided as the User Agent shows a polycom device (not a Fanvil X3) that is not even running the 3CX Supported firmware.

Have you made sure you followed the guide to provision the phones after you factory reset them?
https://www.3cx.com/sip-phones/fanvil-x3-x5/
 
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