[asterisk-users] SNOM Phones Displays NR Frequently

[oi geli]

Hi,

I am using SNOM phones with Asterisks for few years. They used go occasionaly NR, and I would reregister them from the phone web interface. But it started doing frequently for last few months. 
Here are SNOM Phone and the firmware version;

snom190-SIP - Version-Code: snom190-SIP 3.56m 

snom320-SIP - snom320 jffs2 v3.36 

snom300-SIP - snom300-SIP 6.5.2

Asterisk version - Asterisk CVS-01/29/04-16:41:27

I would appreciate any help to fix the NR problem.


Thanks