Certification: Cisco CCNA Voice - CCNA Voice Certification
CCNA Voice was introduced by Cisco in 2008 to make the CCNA certification a common base for the CCNP-level certification. The CCNA Voice certification connected the CCNA with CCNP level certification and enabled the professionals in the networking field to gain knowledge in the voice technologies without having to complete CCNP level certification. The exam requirement for CCNA Voice was Introducing Cisco Voice and Unified Communications Administration (IIUC) 640-460 when the certification was introduced. The requirement was improvised in 2009 with the addition of CVOICE 642-436 exam giving an option for test-takers to take either IIUC 640-460 or CVOICE 642-436 to get the CCNA Voice certification. However, the certification was further improvised with introducing the Introducing Cisco Voice and Unified Communications Administration (ICOMM) 640-461 exam in 2010 and completely replacing the option of taking either of the two exams (IIUC 640-460 or CVOICE 642-436) by the one new exam in March, 2011.
The current CCNA Voice exam lays more emphasis on the configuration and functioning of Cisco Unified Communications applications including Cisco Unified Communications Manager (CUCM), Cisco Unified Presence (CUPS), and Cisco Unity Connection (CUC). The changes in the exam requirement also led to enhanced lab requirements for practice. While the earlier version of the certification exam just required a router with an IOS that had Cisco Unified Communications Manager Express (CUCME) and few phones for learning the material, the new version of CCNA Voice requires access to the Cisco Unified Communications applications to understand the syllabus of the ICOMM 640-461 exam. To know in detail the difficulty in building a CCNA Voice lab now in comparison to the before, it is important to know the difference between the lab requirements for Cisco Unified Communications Manager Express (CUCME) and Cisco Unified Communications Manager (CUCM).
Solutions for Specific issues with CUCM and IP Phones
The Security by Design feature of CUCM version 8 and higher can have issues for multiple users or in returning back for using CUCME while registering to different systems. The issue is caused due to the fact that Security by Design requires a certificate on the phone which should match with the (Trivial File Transfer Protocol)TFTP server. The phone gets its configuration file from the TFTP server and the certificate on the phone which is an authentication to the TFTP server does not allow the phone to get configuration from any other TFTP server. However, this issue can be resolved in two ways:
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