We have many 8845 phones with Plantronics headsets (CS540 mostly) with the proper EHS cable that before the upgrade to 12.5 would beep in the headset when a call came in. We were using sip8845_65.12-1-1SR1-4 and it worked fine. With 12.5, it no longer makes any sound at all. We can't find any setting to turn it back on so we're starting to downgrade phones with headsets. Does anyone have any ideas?
I received 12.5.1ES4 and tested it on an 8845 phone. When a call came in it worked just fine. Apparently the there was a problem with all 88xx and 78xx phones as they have ES4 releases for all of those. I have not tested it on a 7821 but I suspect it will work now, too. The code to handle the EHS cables is probably shared on all 88xx and 78xx phones. The official release that will include the fix is 12.6.1 but there is no indication when that will be released.
This bug is showing as resolved in 12.5.1SR2 which is out now. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/8800-series/firmware/12-5-1SR2/releasenotes/p881_b_synergy-lite-1251sr2.html#CUIP_RF_C4618BD1_00.
I haven't tested it yet to confirm though.
We're experiencing no Ring Tone passed from Cisco 8845 running SR1-4 to Jabra Pro925 using Jabra Link 14201-43 EHS cable. Upgrade on phone to SR2-2 fixed the Ring problem but broke transmit audio from headset to caller.
Note: We recently resolved Ring Tone problems with Plantronics Savi series headsets upgrading phone firmware from SR1-4 to SR2-2. We found that SR1-4 and SR2-2 are problematic with Jabra PRO925.
CUCM Version: 11.5.1
-sip8845_65.12-5-1SR1-4 (No Ring on JabraPro925 headset)
-sip8845_65.12-5-1SR2-2 (No transmit audio on Jabra headset)