[asterisk-users] Aastra phones occasionally show "No Service" - Is there any network setting I can tamper to facilitate a quick DHCP renewal on the Aastra phones?

[Gareth Blades]

bruce bruce wrote:
> Hi Everyone,
> 
> I am running DD-WRT on a router that feeds about 30 Aastra 6753i. The 
> phones occasionally go into "No Service" mode. The POE switch doesn't 
> seem to be the problem as it's tested fine. I think the router sometimes 
> gives up and comes back quickly. Or something of that nature. However, 
> the connections are maintained if a call is going on because there are 
> peer to peer connections between the phones in a network. Anyhow, if the 
> phones are restarted they work fine.
> 
> So, I was looking around the Aastra Admin UI to find any timer to lower 
> it to 1 second to check and make sure the device always has an ip but I 
> can't seem to find anything other than LLDP which is set at 30 and I 
> don't think that will be of any help. 
> 
> I did a test where I would disconnect the router from the switch and 
> after a while phones go into "No Service" but if I plug it back into the 
> switch the phones do not come back right away. Maybe something should be 
> dialed on the phone or wait long time or restart it to work again.
> 
> Any work around?
> 
> Thanks a lot
> 
Try changing the registration period so that they perform a regular 
re-register. That way if something happens and they fail to register 
when they notice a problem they will try again a bit later.