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Cisco IP Phone 8821 Battery Standby Time

Staempfli_
Beginner
Beginner

Hi all

Since 2 weeks we have 10 8821 Cisco IP Phones in use. On every Phones we have a poor Battery Standby Time. According the Data sheet we should have a Standby Time about 200 hours.

 

The Battery on our Phones is over one night empty.

 

System we run:

 

Cisco Unified CM System version: 10.5.2.12901-1
Cisco IP Phone 8821 Load: sip8821.11-0-3SR4-3
 
Bluetooth is Off
802.11 mode is 5GHz only
On call power save is Enabled
Display sleep is 30 Seconds
Battery Type is CP-Batt-8821
 
Thanks in advance for any suggestions
 
Regards
Andreas 
1 Accepted Solution

Accepted Solutions

I'm not sure but certainly possible. You can go to 8.2.x with 1142 as far as I know before there's a hard limit it's just some features after 8.0 are unsupported. You can definitely go to full-featured 8.0.x with them.

 

Ric

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