SIP re-registration with Mitel IPBS2 DECT station

[Steve Ducommun]

Hello everyone!

We have a problem with our DECT phones. To explain the context, we are a boat company and have IT infrastructure on boats (PC, phones, etc.). To etablish a VPN, we use PEPLINK multiple wan routers (PEPVPN).

We already have some problems with one-way audio first and now it's working with TCP trafic. We never known if it was a router (peplink) blocage or firewall but it's working now.

The solution works but we still have a problem with sip re-registration mecanism. If I lost the connection with the PBX (assume VPN broken and restart), the DECT base doesn't do a re-registration, never! So I have to restart the base to fix the problem. Or strangly I can reboot the phone.

I did some test with timers (SIP TTL more longer) but it still a problem.

Is somebody know if there is a re-registration mecanism? And how to configure it? Or how to play with timers.

I don't even know if it's a bug or a normal reaction of the dect. I put the TTL timer on 3000 seconds on the base. On MiVB, there are some timers on the sip capabilities, but I don't know if they are used or if the base manage the timers.

On the base, I have this error 0x00030202 GW-DECT MASTER PBX registration of any user is down.

Thanks all for the help.

 

[meneerB]

Do you use ipbs (ascom) base stations?
Ah. Sorry, you do.

We use >1500 dects. If dect masters are rebooted, many dects will not register/ work properly.
Solution: reboot dects...
So it looks like a dect firmware *timer" thing.

So, it is not the same issue, but similar.
Hopefully someone here has some tips.

 

[tlpeter]

MeneerB, With so many dect phones you need two pari masters and i wonder if that is the case and thus your problem.
Only a 1000 are allowed on one master.

BAZINGA!

I'm not insane, my mother had me tested!

 

[Steve Ducommun]

I think it's the same problem. I changed the TTL sip session duration to 3000 seconds and more. It's better because the link still ok more longer if links broke, but the think I saw that the DECT never retry to connect after broken link (more than ttl duration). I don't think it's normal.

 

[Steve Ducommun]

Perhaps I think that it's because we forced TCP connection (problems with UDP and VOIP over our VPN router). Don't know...

 

[tlpeter]

By default this is 300 so i would change it back.
This is also a setting in the Mitel controller too but i am not sure where it is as i never change the default settings for that.


BAZINGA!

I'm not insane, my mother had me tested!

 

[Steve Ducommun]

Yes, 300 I Think. But with this value, I have to reboot 3-4 DECT every day (because my vpn over 3g sometime broke for some minutes, time to reboot connection). With 3000 (50 minutes) it's ok. But I think it's not normal that the IPBS don't retry after broken connection. I checked on Micollab, if the phone become greyed oud (I think it correspond with time to live sip timer) it's dead, I need to reboot. But if the lost connection is less than the timer (on Micollab the phone still green but sure unavailable when try to call) it's ok.

 

[Steve Ducommun]

I would happy to obtain help from Mitel (even know if it's normal or misconfig)... but they are really poor in Switzerland.

 

[meneerB]

Tlpeter, we do have 2 Pari masters.

Our situation is different then Stebe's, but this is what happens here:

We encountered this after an upgrade of all base stations and masters (pari, sync, mobility)
Auto reconnect did work, but we had issues reaching the dects. So we had to power cycle them.

But also when there is an issue with the air sync (when a base station cannot reach his 'upper' one.)
All dects connected to the affected base stations lose connectivity.
Some dect should then be power cycled, but only a few.

 

[meneerB]

Steve,

How many base stations are on a ship,
If more then 1, does each ship has it's own master?

 

[Steve Ducommun]

No only one DECT phone.

 

[meneerB]

? A dect does not work without a base station.
Is your phone a wifi-model...??

 

[Steve Ducommun]

I have one IPBS with one phone

 

[meneerB]

Maybe it has nothing to do with it;but check:

I suspect that this only one should also be a sync master
This sync master must also have a unique site ID, so that the parimaster and the phone's know that each ship is a individual broadcast 'domain', phones do not have roaming options to other base stations.

(For each site, you must have one or 2 sync masters, and can have 0 to hundreds of extra ipbs's)