Exam Code: 642-426
Exam Name: Troubleshooting Unified Communications (TUC)
Updated: Jul 29, 2026
Q & A: 283 Questions and Answers
642-426 Free Demo download
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| Section | Weight | Objectives |
|---|---|---|
| Voice Quality and Media Issues | 20% | - QoS configuration and marking problems - Codec and media resource failures - Packet loss, delay, and jitter |
| Gateway and Protocol Troubleshooting | 15% | - DSP and hardware resource problems - H.323, SIP, and MGCP protocol issues - PSTN and trunk connectivity failures |
| Cisco Unified Communications Manager Troubleshooting | 30% | - Dial plan and digit manipulation issues - Registration and device connectivity problems - Service and database issues - Call setup and routing failures |
| Troubleshooting Methodology and Tools | 20% | - Systematic troubleshooting approach - Using CLI, GUI, Syslog, SNMP, and Traces - Analyzing call flow and signaling protocols |
| Cisco Unity and Unity Connection Troubleshooting | 15% | - Mailbox and message access issues - Call handler and routing problems - Integration with CUCM |
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