Cisco Unified Contact Center Enterprise uses Cisco Unified Customer Voice Portal in comprehensive mode. The customer estimates the peak inbound traffic to be 20 CPS, and that they have 10% transfer ca

Question

Options

• A24 invites/sec
• B88 invites/sec
• C96 invites/sec
• D22 invites/sec

• A
  12% (4)
• B
  79% (27)
• C
  3% (1)
• D
  6% (2)

Explanation

Option B (88 invites/sec) is correct because CVP Comprehensive mode generates 4 SIP INVITEs per call through the proxy (covering the inbound leg to CVP, the VRU/VXML gateway leg, the return leg to CVP, and the outbound leg to the agent). Starting from 20 CPS base: 20 × 4 = 80. The 10% transfer calls (2 CPS × 2 additional INVITEs = 4) and 10% Courtesy Callback (2 CPS × 2 additional INVITEs = 4) add 8 more, yielding 80 + 4 + 4 = 88.

Option D (22) is wrong because it ignores nearly all SIP signaling overhead - essentially treating this as a near-flat pass-through (20 × ~1.1). Option A (24) similarly undercounts by only adding a small fixed overhead without properly accounting for the multi-leg comprehensive mode architecture. Option C (96) overcounts by misapplying the transfer or callback multipliers (e.g., using 3× instead of 2× for those additional legs).

Memory tip: Think "4 legs in Comprehensive mode" - base CPS × 4 is your foundation, then add 2× for each percentage-based feature (transfers, callbacks). The formula is (CPS × 4) + (transfer% × CPS × 2) + (callback% × CPS × 2).

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