9971 SIP Phones at remote location status REJECTED

[Kudur MohanRaj]

Hi,

I have 10 locations, Site 1, 2, ....10. All these locations have 10 phones each. These phone are configured with default SIP Profile. Were registered and working fine. While adding a subscriber I downgraded the cluster. After bringing back to regular version. I find all my phones status shows unknown. 

I tried to change dhcp option 150 on dhcp router to point different server and reconfigured with the correct tftp ip address. Also I tried to shutdown the interface where phones are connected and bring it back up. Restarted tftp server many times. Even after all these I find my phones in REJECTED state. 

I know personal reset on each phone will fix this issue. But is there any other way to fix this, since these phones are at remote locations.

Any help is appreciated.

Thanks,

MR

[George Thomas]

I would try deleting the ITL certificate on the phones. Settings -> Administrative settings -> Reset security settings to default.

[Kirill Glushenkov]

Hello!

I think, that the most possible issue is problem with CTL/ITL.

Certificates were regenerated while downgrading/upgrading and were not propagated to the phones.

So u should try to delete ITL on the phones.

Regards,

Kirill