The WebServicesManager is responsible for managing the secure communication between the CVP servers and the clients, and it requires a valid Java Keystore to function properly. Restarting the service after making changes to the Keystore ensures that the changes take effect. The other services listed (Cisco CVP Call server, Cisco CVP VXML server, and Client license service) are not related to the Java Keystore and do not require restarting after making changes to it.
References: [1] https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_8_5/configuration/guide/ccce85cfg/ccce85cfg_chapter_0101.html [2] https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_8_5/configuration/guide/ccce85cfg/ccce85

The call is assigned to a call type in the PCCE system when the call is first post-routed from Cisco Unified Customer Voice Portal (Unified CVP). The call type is determined by the data in the Cisco TCD table [1]. The call type is then used to guide the call routing scripts and determine how the call is routed to an agent [2].
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_12_6_1/design/guide/ucce_b_ucce_soldg-for-unified-cce-1261/rcct_b_ucce_soldg-for-unified-cce-1261_chapter_011.html
1. Solution Design Guide for Cisco Unified Contact Center Enterprise ...
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_12_6_1/design/guide/ucce_b_ucce_soldg-for-unified-cce-1261/rcct_b_ucce_soldg-for-unified-cce-1261_chapter_011.html
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/pcce/pcce_11_5_1/maintenance/Guide/PCCE_BK_P5FE2CBD_00_pcce-features-guide-11-5.pdf
2. Cisco Packaged Contact Center Enterprise Features Guide Release ...
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/pcce/pcce_11_5_1/maintenance/Guide/PCCE_BK_P5F

UC on UCS Spec Based is a simplified way of deploying a Unified Communications (UC) solution using the Cisco Business Edition 7000 (BE7000) platform. It is defined as Configuration Based, meaning that the configuration is predefined and the customer is not required to manually configure the system. Additionally, it may be available as a packaged offer, as is the case with the BE7000 platform. Reference: https://www.cisco.com/c/en/us/products/unified-communications/uc-on-ucs-spec-based/index.html

In a Contact Center Enterprise with Cisco Unified Customer Voice Portal and Cisco Unified Border Element deployment, the Cisco Unified Border Element must be configured as media pass flow-through mode. In this mode, the Unified Border Element is configured to route all media traffic directly to the customer voice portal and not through the voice gateway.

In Cisco's Intelligent Contact Management (ICM) solution, a label is a string of characters or digits that is used to route calls to specific destinations or play specific prompts to the caller. When ICM sends back a label of 91919191, it is an invalid or non-existent label and the caller will hear an error message. This error message could be a pre-recorded message or a system generated message such as "The dialed number is not in service" or "Invalid extension, please try again".
It's important to note that MoH (Music on Hold) is a feature that plays music or pre-recorded announcements to callers while they are on hold, Ringing is the sound that a caller hears when the call is being connected and Audio is a general term that refers to the sound or voice that is played to the caller.