cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
3145
Views
5
Helpful
2
Replies

'network unavailable' in 7821 phones

enaforhmd
Beginner
Beginner

We acquired in 2016,  220 cisco  Phones 7821, currently more than 20 ipphones are down,  they all have the same probléme which is  'network unavailable' , the pin (RJ45) are not damaged,  we have changed the cable, used other switch, reset phone,  phones still not working.

 

I read in the forum that it's a Hardware design error (ETH socket mounting), please help us to find a solution, so that this problem does not reach more phones.

 

regds,

2 Replies 2

Ratheesh Kumar
Advisor
Advisor

Hi there

 

Could be a harware issue as there was a known issue for 7821 phones. 

Check this bug and workaround, though it's affecting 6921 series

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCtr09039/?rfs=iqvred

 

 

Hope this helps!

Cheers
Rath!


***Please rate helpful posts***

 

 

Hi,

Yes Switchport is set to : Auto/Auto (SW 4500 Series).

Regards,

Enafor.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Recognize Your Peers