For your reference:
To recertify, pass ONE of the following before the certification expiration date:
To recertify the CCNP Voice Certification, you can take and pass one Professional level 642 exam by or before the certification expiration date. Any 642 prefix exam under a professional level certification track such as CCNP, CCDP, CCNP Wireless, etc. is considered a professional level exam.
However, the 642-165 UCCX exam will not qualify to recertify the CCNP Voice Certification because it is not a professional level exam.
For additional recertification options or information, you can reference the information provided by the user above or visit the CCNP Voice Recertification page.
Cisco Learning Network Moderator