Help needed in troubleshooting multiple SIP registrations

General Help
1

Not a peculiar freepbx problem…
I’m trying to solve an avaya pbx issue in conjuction with a Panasonic IP dect system:
Panasonic dect system uses their ip base stations to register cordless as SIP extensions into avaya pbx
Very often, dect system loses SIP connection with pbx (“can’t connect to server” error)
As both systems have poor logs, I have connected a fresh FreePbx system in place of Avaya PBX
FreePbx log says :

[2017-05-04 10:31:51] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.122:5061
[2017-05-04 10:33:24] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 10:33:36] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.121:5061
[2017-05-04 10:34:55] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 10:37:02] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.121:5061
[2017-05-04 10:37:13] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 10:38:37] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.122:5061
[2017-05-04 10:40:22] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 10:41:24] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.122:5061
[2017-05-04 10:47:06] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 10:49:12] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.122:5061
[2017-05-04 10:54:30] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 11:00:12] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.125:5061
[2017-05-04 11:00:31] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.122:5061
[2017-05-04 11:01:53] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061
[2017-05-04 11:07:46] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.122:5061
[2017-05-04 11:09:12] VERBOSE[2388] chan_sip.c: Registered SIP ‘510’ at 192.168.0.123:5061

As you can see, the exmple extension 510 renews its registration with pbx very often, and it comes from different ip address (that are the different dect Base Station addresses)
In fact I have to insert the Base Stations IP addresses in FreePbx whitelist to avoid them to be banned.

It’s hard to say what does this behaviour mean , can anybody explain what , pratically, the log output suggests ??

Thank you

2

Why is the IP address for the base station changing every few minutes, or why is that required?

3

Or is this three base stations all trying to use the same extension?

I looked and that is the case - you can’t do that with Chan-SIP. If you want to use the same extension on all three base stations, you will have to change to PJ-SIP for this and set the number of concurrent sessions high enough that each registration doesn’t knock the other two stations off-line.

4

That is supposed to be the real issue, I don’t know why ,it is not required. I was thinking about dect phones roaming between base stations, but it happens also with phones leave in a single place, on the other side no ip change happens when moving between BS with dect terminals, is is so…random…

There are four sip endpoint (the four dect terminals) configured on “Master” base station and four relative extensions on the pbx, yes probably cuncurrent registration on avaya pbx cause the disconnections.
Anyway on freepbx using Chan-SIP there is absolutely NO issues with all this repeated registration for the same extension (no real multiple devices with the same extension, just the same dect terminal but with registration generated from a different IP-BS)
No way for Avaya pbx to use Chan-PJSIP and this is the pbx to be used at last anyway, freepbx was only set up for logging/troubleshooting purpose.