We are upgrading CallManager 6.1(3b) to 7.1(3b). Our customer has concerns that, like their last upgrade to 6.1(3b) , this one may result in
echo on the IP phones (most of which are 7941G's) on internal calls. Their workaround was to downgrade the phone firmware following the upgrade.
I've checked the Release nots for 7.1(3b) and see no caveats related to echo. The Firmware version for a 7941G in 7.1(3) is listed as "SCCP41.8-52SR1S" but the closest firmware that can actually be downloaded is "cmterm-7941_7961-sccp.8-5-2SR1." Do you suppose these are actually one in the same & the firmware has just been renamed? We were hoping to upload the new firmware on a few phones prior to the upgrade just to rule out the phone's firmware. (Even though it may not be an accurate picture of how the phones will react under 7.1(3b) UCM software.) Are there any parameters in the
PSTN gateway that could effect audio on the local LAN? Any suggestions on how to mimimize the possiblity of this happening again? Thanks!