We recognized a bizarre issue during post-implementation support recently. All 8961 series phones were very sluggish and they couldn’t keep up with the receptionists' fast fingers. After investigation / research, we saw that “Simplified New Call UI” was set to “Disabled” on the root of the phone configuration. The purpose of this feature is described below. This was introduced in CUCM 9.x and carries through to the present Collaboration System Release. After enabling the Simplified New Call UI” on all 8961s in the environment, response time was much faster. Note that the same applies to the 9951 and 9971 series phones as well. Cisco Bug Tracker appears to indicate there are several related and open issues with the current firmware.
Simplified New Call Bubble
The Simplified New Call Bubble feature provides a simplified window for the user to place an off-hook call. The administrator enables or disables the feature in the Phone Configuration window using the Simplified New Call UI field. By default, the feature is disabled.
When the user start dialing a call with the Simplified New Call Window, the phone does not display possible phone number matches from the call history.
The feature is supported on the following SIP phones: