CCVP - Cisco Certified Voice Professional
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Cisco IP Telephony Part 1 (CIPT1 4.1)
Cisco IP Telephony Part 2 (CIPT2 4.1)
lub
Implementing Cisco Unified Call Manager Part 1 v5.0 (CIPT1 5.0)
Implementing Cisco Unified Call Manager Part 2 v5.0 (CIPT2 5.0)