Linphone in Linux Debian 12.

Hi,

Debian 12 here. 
Linux imager 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22)
 x86_64 GNU/Linux

root@imager:~# cat /etc/deb*n
12.11

Linphone according to this.
root@imager:~# dpkg -l | grep linphone
ii  liblinphone++10:amd64                    5.1.65-4
    amd64        Linphone's shared library part (supporting the SIP protocol)
ii  liblinphone10:amd64                      5.1.65-4
    amd64        Linphone's shared library part (supporting the SIP protocol)
ii  linphone                                 4.4.10-3
    all          SIP softphone - graphical client (transitional package)
ii  linphone-cli                             5.1.65-4
    amd64        SIP softphone - console-only client
ii  linphone-common                          5.1.65-4
    all          Shared components of the linphone SIP softphone
ii  linphone-desktop                         4.4.10-3
    amd64        SIP softphone - graphical client

Linphone is configured to use the Diamondcard PSTN gateway and the 
graphical client has been configured.  https://www.diamondcard.us

I can make an outgoing call to a PSTN number via the gateway with no 
difficulty.

An incoming call to my Diamondcard Direct Inward Dialing (DID) number
produces a ring sound and a small dialogue offering to accept or 
decline the call.  If I click on "accept" the connection immediately
vanishes.  The call can not be received.

The Linphone app works on my old iPhone.

Any ideas about Linux Debian?  Has anyone else tried to use Linphone 
there?  Anyone else using the Diamondcard gateway?

Thanks,                                ... Peter E.

-- 
VoIP:    +1 778 508 0020 <= new
VoIP:    +1 604 670 0140 <= out of service
mobile:  +1 778 951 5147 <= working
projects: en.wikibooks.org/wiki/User:PeterEasthope


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