Friday,30 October, 2020

Subscribe to Newsletter

HOME
  NEWS
  Knowledge Center
 
Knowledge Center

IP Telephony Components And Protocols

IP Telephony solutions are applicable in all environments in which legacy telephony installations can be found, including home users, SMBs, large enterprises, and carriers. Even though the deployment environment and customer requirements for IP Telephony solutions differ, the design approach remains the same. Topology, performance, and budget considerations drive the choices of equipment and protocols following the identification of the stakeholder requirements. The key solution components, although they differ in scalability and capability, share the same characteristics and principles of operation. Viewing voice as an application implies that a viable IP infrastructure must be in place to support any successful IP Telephony solution deployment.

In developing an IP Telephony solution, you must also maintain a clear distinction between IP Telephony and Voice over IP (VoIP). Although the two expressions are frequently used as synonyms in casual technical discussions, consider VoIP as an enabler of IP Telephony in the context of design. An IP Telephony solution relies on VoIP standards, protocols, and equipment to create as complex or as simple a telephony system as has been determined by the user requirements and the available budget.

Consider the following key IP Telephony components:

• Gateways

• Gatekeepers

• Software

• IP phones

• VoIP protocols

Gateways:

Generically, a gateway converts between the same layer protocols from different computing architectures or technologies. The H.323 recommendation identifies a number of gateway types (access, trunking, media, composite, and decomposed) that reflect a high degree of gateway versatility in packet-based multimedia communications systems that include IP Telephony. Yet, this gateway versatility inevitably implies that in the course of designing IP Telephony or any other communications solution; you need a clear understanding of each gateway's functionality. In the context of H.323, gateways are also referred to as endpoints, meaning that they can initiate and terminate calls.

Finally, in an IP Telephony deployment without TDM, PSTN, or POTS interfaces, gateways are not needed. If an SMB's internal phone system is entirely IP-based, and the interface to the provider for local, long-distance, and international calls outside of the SMB network is also via IP, that SMB will not require gateways. To integrate legacy phone instruments into an IP-based telephone system, a voice gateway is required. The analog voice gateway allows for the integration of analog phones, faxes, and modems with the IP-based Call processing platforms.

Because gateways represent the points of convergence between different communications systems, they can be deployed individually or in groups as a function of the size of the networks and the number of points (locations) where the different networks need to interconnect.



Rate This:

Posted by ROOT Technologies


Poll
What is your favourite search engine?
Google
Yahoo
Bing

Most Viewed
  Riverbed Launches Industry’s Most Complete Digital Experience Management Solution

  Credence Security to Address Growing Market for GRC Solutions in Middle East Through Partnership with Rsam

  New Mimecast Archive Cloud Capability Streamlines GDPR Management for Email

  Planning and Scheduling Software–Helping Manufacturers Keep Their Customers Happy

  Farsight Security and Infoblox Provide Zero-Hour Protection Against Cyberattacks Due to New Domains

  Fujitsu Launches High-Security Biometric Authentication Solution for Active Directory IT Environments

  Rackspace Wins 2017 Red Hat Innovator of the Year Award

  ServiceNow Survey Shows 2018 as the Year of Automation for Routine Enterprise Work

  4 Tech Hacks to Faster Customer Onboarding

  New Mimecast Report Detects 400% Increase in Impersonation Attacks