VoIP-gateway in PSTN <-> SIP mode / incoming from PSTN

[VladislavA]

Recently I tried to use the D-Link DVG-6004S as a VoIP-gateway in PSTN <-> SIP mode.

I found that internal communications (SIP-phone <-> SIP-phone) is fine but PSTN <->Gateway <->3CXPhoneSystem<->SIP-phone communication is impossible.

Firstly, I tried troubleshooting PSTN incoming call (PSTN -> Gateway ->3CX_Phone_System -> SIP_Phone). During call initiation 3CX generated server status message

 

[archie]

PBX just can not associate received SIP INVITE with any known entity. Create PSTN gateway with line that has internal number 10000. And read the manual.

 

[5qg4]

Endpoint::findSource Can not find source by following specs: Contact IP: '192.168.10.20'; From: '10000'; To: '100'; Rline: '100'; Contact: '10000'

 

[VladislavA]

Yeah, I already have defined "PSTN line" and "VoIP Gateway Configuration".

Result is the same for default Advanced options and corrected Advanced options.

I tried two modes (with Hotline and w/o Hotline) with the same result. Then I decided that problem in 3CX.

Here are the settings for Hotline mode (VoIP gateway web interface):
* The Telephony settings page.
Line: 1
Enable: (checked)
Type: FXO
Hot Line: (checked)
Hot Line No.: 100

All other settings are by default.

Here are the settings for "w/o Hotline" mode (VoIP gateway web interface):
* The Telephony settings page.
Line: 1
Enable: (checked)
Type: FXO
Hot Line: (unchecked)
Hot Line No.: (empty)

All other settings are by default.

In the "w/o Hotline" mode I entered "100" on the deskphone after VoIP gateway voice message.

 

[VladislavA]

One man from the forums.d-link.ru forum told me about using D-Link WAN Ethernet interface instead of D-Link LAN interfaces. (Note - I don