What is referred to as a switch leg on CVP?

In Cisco Unified Customer Voice Portal (CVP) architecture, the "Switch Leg" refers specifically to the inbound SIP call leg established between the ingress voice gateway (or Cisco Unified Border Element) and the CVP Call Server. This leg carries the initial call signaling from the PSTN into the CVP system. Once CVP receives this leg, it communicates with UCCE to determine the next step, which typically involves establishing a separate "VRU Leg" to the Virtual Voice Browser (VVB) for media treatment and IVR interaction.

A. The communication between CVP and UCCE/PCCE uses GED-125 or VRU PG signaling, which is a data connection, not a SIP switch leg.
C. The connection from CVP to the Virtual Voice Browser (VVB) for media and ringtones is defined as the "VRU Leg," not the switch leg.
D. The call leg routed from CVP to an agent endpoint is referred to as the "Agent Leg" or "Ring Leg," not the switch leg.

1. Cisco Systems, Inc. (2020). Cisco Unified Customer Voice Portal Design Guide, Release 12.5(1). Chapter: CVP Architecture, Section: Call Legs (Switch Leg, VRU Leg, Agent Leg).