Trail period, unable to make external incoming and outgoing calls

[TTCSF]

We are still having issues and require your assistance.
Please see the below information, this is to assist in resolving the issue of outgoing and incoming calls externally:

1. 3CX NS32 Lite is configured as the SIP gateway and is sending the data to the service provider gateway. They can now see our side MAC address from the device. However, we are still unable to make inbound and outgoing calls
2. The SIP trunk is created on the Hosted PBX interface. Both outgoing rules and incoming Digital receptionists are configured.
3. However, I notice that the register SIP is going out to the 143.244.185.177 IP, which is the hosted PBX, not the SIP ns32 lite device, which is supposed to be 10.180.3.162, with the remote service provider end is 10.180.3.161.
4. How can we get the SIP register to change to the 10.180.3.162 IP? See couple call logs below.

[CM102001]: Authentication failed for AuthFail Recv Req REGISTER from 5.39.53.85:49316 tid=718013072 Call-ID=2134117272-2111837767-1788620517:
REGISTER sip:143.244.185.177 SIP/2.0
Via: SIP/2.0/UDP 5.39.53.85:49316;branch=z9hG4bK718013072
Max-Forwards: 70
Contact: <sip:[email protected]:49316>
To: <sip:[email protected]>
From: <sip:[email protected]>;tag=1887183416
Call-ID: 2134117272-2111837767-1788620517
CSeq: 2 REGISTER
Proxy-Authorization: Digest username="86765890",uri="sip:143.244.185.177",algorithm=MD5,realm="3CXPhoneSystem",nonce="414d53590000521e63:22981cc5ac67d5553d1bdd8931babf64",response="684f459c2cd3e8446c3845298aba5273"
User-Agent: Avaya IP Phone 1120E
Content-Length: 0
; Reason: Credentials don't match, check that authorization-ID and password match the ones in extension settings
03/18/2026 3:54:53.090 PM     [CM102001]: Authentication failed for AuthFail Recv Req REGISTER from 148.77.116.66:5060 tid=fb20e43bb5677a570ac657fa71ef8516.0 Call-ID=e5f4a259219994e4f7a048:
REGISTER sip:143.244.185.177:5060 SIP/2.0
Via: SIP/2.0/UDP 148.77.116.66:5060;branch=z9hG4bKfb20e43bb5677a570ac657fa71ef8516.0
Via: SIP/2.0/UDP 185.44.77.87:63861;branch=z9hG4bK183d5a24-59ec-4f05-8325-3265636300484;received=185.44.77.87;rport=63861
Max-Forwards: 69
Contact: <sip:[email protected]:63861>
To: <sip:[email protected]>
From: <sip:[email protected]>;tag=048e5f4a2592199e4f7a
Call-ID: e5f4a259219994e4f7a048
CSeq: 2 REGISTER
Expires: 3600
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO
Proxy-Authorization: Digest username="1048",realm="3CXPhoneSystem",nonce="414d5359000051e980:f38c029a42922c783c9e6451865f3833",uri="sip:143.244.185.177:5060",response="d1a14e4fde6d204eaf0cf8ffaa9affff",algorithm=MD5
User-Agent: PolycomSoundPointIP-SPIP_450-UA/3.3.4.0085
Content-Length: 0
; Reason: Credentials don't match, check that authorization-ID and password match the ones in extension settings
03/18/2026 3:54:47.895 PM     [CM102001]: Authentication failed for AuthFail Recv Req REGISTER from 4.1.189.10:5060 tid=a02577c87191ccac0ac657fa71ef8516.0 Call-ID=e5f4a352510351e4f7a50:
REGISTER sip:143.244.185.177:5060 SIP/2.0
Via: SIP/2.0/UDP 4.1.189.10:5060;branch=z9hG4bKa02577c87191ccac0ac657fa71ef8516.0
Via: SIP/2.0/UDP 109.70.144.76:55717;branch=z9hG4bK183d5a24-59ec-4f05-8325-411373046504;received=109.70.144.76;rport=55717
Max-Forwards: 69
Contact: <sip:[email protected]:55717>
To: <sip:[email protected]>
From: <sip:[email protected]>;tag=50e5f4a3525103e4f7a
Call-ID: e5f4a352510351e4f7a50
CSeq: 2 REGISTER
Expires: 3600
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO
Proxy-Authorization: Digest username="510",realm="3CXPhoneSystem",nonce="414d5359000051e401:f702fc91c8a034b0d3bf31b01b23c885",uri="sip:143.244.185.177:5060",response="acf34231a1532bc60a03d7e210820a15",algorithm=MD5
User-Agent: PolycomSoundPointIP-SPIP_450-UA/3.3.4.0085
Content-Length: 0
; Reason: Credentials don't match, check that authorization-ID and password match the ones in extension settings
SERVICE PROVIDER LOG

 

[Charles_3CX]

Regarding your question, the logs you provided indicate registration issues with an Avaya IP Phone 1120E and a Polycom SoundPoint IP 450, both of which show authentication errors.

Additionally, attempting to register a PSTN gateway device with a 3CX hosted service is neither tested nor supported on our side. Based on your attachment, the final response shows a 500 Internal Server Error from the destination.

You may want to consider using a supported SIP trunk provider that has been tested with 3CX to ensure reliable inbound and outbound call functionality.