05-08-2018 01:44 AM - edited 03-17-2019 12:46 PM
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,
05-08-2018 10:24 AM
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!
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05-09-2018 12:53 AM
Hi,
Yes Switchport is set to : Auto/Auto (SW 4500 Series).
Regards,
Enafor.
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