For individuals using Cisco Unified Communications Manager the following path towards certification is recommended:
Required Exam(s) Recommended Training
642-436 CVOICE
642-446 CIPT1 Implementing Cisco Unified Communications Manager Part 1 (CIPT1 v6.0)
642-642 QoS Quality of Service (QoS)
642-456 CIPT2 Implementing Cisco Unified Communications Manager Part 2 (CIPT2 v6.0)
642-426 TUC Troubleshooting Cisco Unified Communications Systems (TUC v1.0)