Voice in packet •The changing world of today •Why businesses should use VOIP •How businesses move to VOIP
Voice in packet The world at the end of 20th century Voice Video Data •Three separate networks: Voice, Video, and Data •Difficult to integrate applications •Each area is its own world: Infrastructure, Staff,..
Voice in packet Cisco’s goal: Unified Communications Voice Data Video •Bandwidth capabilities have been increasing for years •Service providers see the opportunity •Opportunities now come to business and homes
Voice in packet Why an organization would use VOIP? The business benefits of VoIP include the following: Reduced cost of communicating: Instead of relying on expensive tie lines or toll charges to communicate between offices, VoIP allows you to forward calls over WAN connections. Reduced cost of cabling: VoIP deployments typically cut cabling costs in half by running a single Ethernet connection instead of both voice and data cables. Seamless voice networks: Because data networks connect offices, mobile workers, and telecommuters, VoIP naturally inherits this property. The voice traffic is crossing “your network” rather than exiting to the PSTN. This also provides centralized control of all voice devices attached to the network and a consistent dial- plan. Unified e-mail, voicemail, fax: All messaging can be sent to a user’s e-mail inbox. This allows users to get all messages in one place and easily reply, forward, or archive messages. Increased productivity: VoIP extensions can forward to ring multiple devices before forwarding to voicemail. This eliminates the “phone tag” game.
Voice in packet Take your phone with you: Cost estimates for moves, adds, and changes (MAC) to a traditional PBX system range from $55 to $295 per MAC. With VoIP phone systems, this cost is virtually eliminated. In addition, IP phones are becoming increasingly plug-and-play within the local offices, allowing moves with little to no reconfiguration of the voice network. In addition, when combined with a VPN configuration, users can take IP phones home with them and retain their work extension. IP SoftPhones: SoftPhones represent an ideal example of the possibilities when combining voice and data networks. Users can now plug a headset into their laptop or desktop and allow it to act as their phone. SoftPhones are becoming increasingly more integrated with other applications such as e-mail contact lists, instant messenger, and video telephony. Feature-rich communications: Because voice, data, and video networks have combined, users can initiate phone calls that communicate with or invoke other applications from the voice or data network to add additional benefits to a VoIP call. Open, compatible standards: In the same way that you can network Apple, Dell, and IBM PCs together, you can now connect devices from different telephony vendors together
Voice in packetThe old to the newMost companies have been running on PBX systems for years and movingtheir entire network to VOIP is a shock.They use two phase approach: Voice and WAN Interface Card Phase 1:
Voice in packetThe old to the new Phase 1: -Keep all existing equipment just buy new router -It is relatively cheap -Choose one of two paths: IP WAN, PSTN Phase 2: It is possible as a company is moving to have a hybrid.
References Cioara, J., Valentine, M. (2012). CCNA Voice 640-461 Official Cert Guide, Cisco Press, USA Wallace, K. (2005). Voice over IP First-Step, Cisco Press, USA Wallace, K. (2006). Authorized Self-Study Guide Cisco Voice over IP (CVoice), Cisco Press, USA