FQDN vs IP address when registering / making calls

[shedster99]

I have a very, very odd issue.

Using v9 (free version) I can create a single extension and either using a soft/hard phone if I use a fqdn to register the extension with the PBX (registration is 100% successful) I cannot even make the simplest of internal calls to *777 or the voicemail extension (900).

If however I set the extension (soft/hard phone) to use the IP address of the PBX, it works sweet as a nut.

The PBX is on a server on the net with a public IP address
FQDN resolves to same IP address as the working environment
Handset and softphone are on public IP addresses in local LAN so are remote extensions


Any ideas ?
The only difference between working and not working is the IP address vrs the FQDN ?



Log of INVITE below, i have replaced the IP address and fqdn for security ;

14:51:20.354 [CM500002]: Unidentified incoming call. Review INVITE and adjust source identification:
INVITE sip:*777@fqdn_address:5060 SIP/2.0
Via: SIP/2.0/UDP IP_ADDRESS:5060;branch=z9hG4bKef755824a875047ec
Max-Forwards: 70
Contact: "101"<sip:101@IP_ADDRESS:5060;transport=udp>;+sip.instance="<urn:uuid:00000000-0000-1000-8000-00085D18D6BB>"
To: "*777"<sip:*777@fqdn_address:5060>
From: "101"<sip:101@fqdn_address:5060>;tag=be59ac12bf
Call-ID: a15215b7fc9ad742
CSeq: 8147 INVITE
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, OPTIONS, UPDATE, PRACK, SUBSCRIBE, INFO
Supported: gruu, path, timer, 100rel, replaces
User-Agent: Aastra 53i/2.5.1.2000
Allow-Events: talk, hold, conference, LocalModeStatus
Content-Length: 0

 

[leejor]

Did you put your FQDN info into 3CX, in....Settings/Advanced/Local SIP Domain ?

 

[Lukas]

Right... it took me 2 hours to figure out... and only with the help of the forum... maybe it could be spelled out more explicitly in the manual, as it looks like I am not the only one.

Of course, the real problem is that we don't read manuals -- do we? If I think back at this, it would have taken less time to RTFM from top to bottom :lol:

 

[leejor]

Yes, well, with more and more "consumer products" working right out of the box, fewer people can be bothered reading the manual.

 

[shedster99]

Did you put your FQDN info into 3CX, in....Settings/Advanced/Local SIP Domain ?

DOOOOOOOHHHHHHH !

No, it was the IP address....