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CCNA Voice…

October 7, 2014

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Just a few weeks ago , I borrow a book entitled CCNA Voice – Study Guide by Sybex. It’s pretty a good book to read , for those who interested in taking CCNA Voice. It Includes about 11 chapter consist of VoIP Voice. In Cisco Unified Communication architecture , Unified Communications Managers are what makes IP telephony possible. These hardware/software devices are the brains that handle IP call processing. The call processing portion of a Unified Communication System handles the sequence of operations from time a user pick up a phone to make a call to the time the user ends the call by hanging up. All of the signaling , dial interpretation , ringing , and call connecting is performed by the call processor. From a phone user’s standpoint , the call processor acts like a legacy based analog or digital phone. All of the basic phone functions such as dialing , ring signals , and interactions are the same as they’re always been. This is obviously by design ; because users are so familiar with using phones , it would be very difficult to modify user behavior.

Cisco Unified Communications Manager
When moving from Cisco Unified Communications Manager Business Edition to a full CCM solution, you are primarily gaining two key benefits: redundancy and scalability. The full Cisco Unified Communications Manager network solution can scale to virtually any size and allows you to implement multiple redundant servers that can support IP phones and applications should any of your primary call processing servers fail.

Applications Layer
As you move up to the next layer of the Cisco VoIP structure, you encounter the applications that expand the functionality of the voice network in some way. Many applications have already been developed for the Cisco VoIP solution, each of them adding its own special features to the voice network. Three of these application servers stand out as “essential applications” for many VoIP networks: Cisco Unity (voice mail), Interactive Voice Response (IVR)/Auto Attendant, and Unified Contact Center.

Cisco Unity Products
Cisco has designed the Cisco Unity product line to encompass everything dealing with messaging. Whereas traditional phone systems are geared to deliver messages to telephone handsets, Cisco Unity allows you to deliver messages to a variety of clients. This allows VoIP network users to unify (thus the name) all messaging into a single point of access. For
example, fax messages, voice mail, and e-mail can all be delivered to a single inbox. The Cisco Unity product line comes in three different flavors, as discussed in the following sections:
1.  Cisco Unity Express
2.  Cisco Unity Connection
3 . Cisco Unity

p/s:- taking from the excerpt – CCNA Voice – Study Guide – from Sybex.

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