The 640-460 Implementing Cisco IOS Unified Communications (IIUC) exam is associated with the CCNA Voice certification. This exam confirms basic IP telephony installation, configuration, and maintenance skills by testing a candidate's knowledge of implementing and configuring small- to medium sized IP Telephony solutions using Cisco Unified Communications Manager Express, Cisco Unity Express, and the UC500 Smart Business Communications System solutions.

The Cisco Certified Network Associate Voice (CCNA® Voice) validates associate-level knowledge and skills required to administer a voice networkThe Cisco® CCNA Voice certification confirms that the required skill set for specialized job roles in voice technologies such as voice technologies administrator, voice engineer, and voice manager. It validates skills in VoIP technologies such as IP PBX, IP telephony, handset, call control, and voicemail solutions.

The CCNA Voice Certification enterprise option assesses skills/knowledge related to the Cisco Unified Communications Manager 6.0 (CUCM) 6.0. It is typically employed by large organizations such as governments, large companies, and colleges. The CVOICE #642-436 exam will be required for this option.

The CCNA Voice Certification commercial option assesses skills/knowledge related to the Cisco CallManager Express (CME) and Cisco Unity Express (CUE) solutions typically used by medium & small organizations such as companies with less than 2,000 employees, retail businesses, and small school districts. The IIUC exam #640-460 will be required for this option.

A prerequisite of a valid CCNA or any CCIE certification is required.

CCNA Voice certifications are valid for three years. To recertify, pass a CCNA Concentration exam (wireless, security, voice), or pass any 642 – XXX professional level or Cisco Specialist exam (excluding Sales Specialist exams), or pass a current CCIE or CCDE written exam.