Voice over IP (VoIP): Voice over IP is the protocol that encapsulates voice traffic in an IP header. The encapsulated voice traffic is converted from an analog signal to a digital bit stream using a codec. Different codec(s) offer different voice quality and IP characteristics. Selecting the proper codec is an important process when determining how the voice application will be used and how much bandwidth will need to be allocated.
Cisco ISR (Integrated Services Routers) allows our customers to integrated voice technology into their network. The ISR options include voice DSP (Digital signal processing) modules, call routing technology, and voice mail capabilities. For more robust call routing and reporting, dedicated telephony application can be connected to the network and linked together.
QoS (Quality of Service): When voice, video, and data are all sent using the same network customers can save significant costs. Each of these applications, however, has a different network requirement. Voice is real-time and often sends a large quantity of small packets every second. These packets can not be delayed or queued as "old" voice traffic is useless. Data, on the other hand, is usually not real-time and can tolerate some level of delay before the user notices. QoS is the protocol used to prioritize different traffic flows so as to allow the integration of voice, video, and data on the same network.
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