Multiple communication networks exist as entirely separate entities, each serving a specific application. The traditional public switched telephone network (PSTN) time-division multiplexing (TDM) network serves the voice application; the Internet and intranets serve data communications.
Business requirements often force these networks to interoperate. As a result, deploying multiservice (data, voice, and video) applications such as unified messaging or web-based customer contact centers requires expensive and complex links between proprietary systems, such as private branch exchanges (PBXs) and standards-based data networks.
The traditional enterprise communication takes place on two separate networks:
Over time, the Internet (and data networking technology in general) encompassed the traditional traffic types. This convergence recently started to absorb voice and video as applications into the data network. Several large Post, Telephone, and Telegraph (PTT) carriers use packet switching or voice over ATM as their backbone technology, and enterprise customers accept virtual trunking, or connecting their disparate PBXs via their wide-area data network, to avoid long-distance charges.
By converging these previously disparate networks into a single, unified network, you can begin to realize savings in multiple areas, including lower total cost of ownership, toll savings, and increased productivity.
Cisco CallManager and Cisco IP Phones provide an IP Telephony PBX PBA Doha Qatar solution that operates on an IP infrastructure. The clustering architecture of Cisco CallManagers allows you to scale to a highly available voice-over-IP (VoIP) network.
Cisco Architecture for Voice, Video, and Integrated Data (Cisco AVVID)
Cisco AVVID encompasses the following components:
ïConverged client devices
ïService and support
Cisco AVVID solutions enable you to
ïDeploy IP-enabled business applications
ïImplement a standards-based open architecture
ïMigrate to a converged network in your own time frame
Cisco AVVID enables you to move from maintaining a separate data network and a closed, proprietary voice PBX system to maintaining one open and standards-based, converged network for all your data, voice, and video needs.
The following list gives some voice and video applications in the application layer of Cisco AVVID:
ïCisco UnityóThe Cisco Unity messaging application provides voice messaging to enterprise communications.
ïVideoóIP-TV and IP-video conferencing products enable distance learning and workgroup collaboration.
ïCisco IP IVRóAs an IP-powered interactive voice response (IVR) solution, Cisco IP IVR, combined with Cisco IP AutoAttendant, provides an open and feature-rich foundation for delivering IVR solutions over an IP network.
ïCisco CallManager Attendant ConsoleóThis flexible and scalable application replaces the traditional PBX manual attendant console.
ïCisco IP SoftPhoneóThe Cisco IP SoftPhone, a software, computer-based phone, provides communication capabilities that increase efficiency and promote collaboration.
ïCisco Personal AssistantóCisco Personal Assistant selectively handles calls and helps you make outgoing calls. Cisco Personal Assistant provides rule-based call routing, speech-enabled directory dialing, voice message browsing, and simple ad hoc conferencing.
Cisco CallManager, a software-only call-processing application, distributes calls and features and clusters phones, regions, and groups over an IP network, which allows scalability to 30,000 users and triple call-processing redundancy.
Cisco CallManager provides signaling and call-control services to Cisco-integrated applications, as well as to third-party applications.
The following list shows the components of the infrastructure layer of Cisco AVVID:
ïMedia convergence servers
ïGeneral voice products for Cisco IP Telephony PBX PBA Doha Qatar Solutions
ïIntegrated IP Telephony PBX PBA Doha Qatar solution
ïToll bypass products
ïIP protocols such as MGCP, H.323, and SIP
Cisco delivers the following IP-enabled communication devices:
ïCisco IP Phone 7970
ïCisco IP Phone 7960
ïCisco IP Phone 7940
ïCisco IP Phone 7912
ïCisco IP Phone 7910
ïCisco IP Phone 7905
ïCisco IP Phone 7902
ïCisco IP Conference Station 7936
ïCisco IP Conference Station 7935
ïCisco IP SoftPhone
ïCisco IP Phone Expansion Module 7914
Cisco IP Telephony PBX PBA Doha Qatar Network
The Cisco IP Telephony PBX PBA Doha Qatar network includes the following components:
ïCisco IP Phones
ïMedia Termination Point (MTP)
ïMusic On Hold (MOH)
ïInline power modules (10/100 Ethernet switching modules)
ïCisco IP SoftPhone
Control from the Cisco IP Phone to Cisco CallManager uses skinny client control protocol and, independently, desktop computer to Cisco CallManager, as an H.323 gatekeeper that is using H.225/H.245 over transmission control protocol (TCP).
Where to Find More Information
ïSystem Configuration Overview, page 3-1
ïDevice Support, page 10-1
ïUnderstanding Cisco CallManager Voice Gateways, page 35-1
ïTranscoders, page 21-1
ïConference Bridges, page 20-1
Additional Cisco Documentation
ïCisco CallManager Configuration, Cisco CallManager Administration Guide
ïDevice Defaults Configuration, Cisco CallManager Administration Guide
ïCisco IP Phone Configuration, Cisco CallManager Administration Guide
ïGateway Configuration, Cisco CallManager Administration Guide
ïTranscoder Configuration, Cisco CallManager Administration Guide
ïConference Bridge Configuration, Cisco CallManager Administration Guide
ïCisco CallManager Features and Services Guide
ïCisco IP Telephony PBX PBA Doha Qatar Solution Reference Network Design Guide
ïCisco IP Phone user and administration documentation