IP Telephony & Contact Center Architects

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Sip trunking – future of tomorrow communications

SIP Trunking Service Providers Components

SIP trunking in Lync Server 2013

Deploying SIP trunking can be a big step toward simplifying your organization’s telecommunications and preparing for up-to-date enhancements to real-time communications. One of the primary advantages of SIP trunking is that you can consolidate your organization’s connections to the public… Continue Reading →

The SIPconnect Technical Recommendation for SIP Trunk

The SIPconnect Technical Recommendation is an industry-wide, standards-based approach to direct IP peering between SIP-enabled IP PBXs and VoIP service provider networks… for SIP Trunk http://www.sipforum.org/content/view/273/227/  

Centralized vs Distributed SIP Trunking Topologie

Distributed SIP trunking architecture  – SIP trunks are terminated at each enterprise site Centralized SIP trunking architecture – SIP trunks are consolidated into central data centers


The term “trunk” has been used within circuit switched telephony systems for many years. Wikipedia defines a trunk as: A circuit between telephone switchboards or other switching equipment, as distinguished from local loop circuits which extend from telephone exchange switching… Continue Reading →

SIP Trunking no longer just connects enterprise PBX premise-equipment to a service provider’s network – they deliver full Unified Communications.

SIP Trunking solutions are designed to help enterprises with an existing premise-base communication solution to start their migration to cloud-delivered communication services. SIP Trunking no longer just ensures business continuity, with rich group features, they now provide businesses with access… Continue Reading →

Request Message Format of SIP

In the previous SIP session example we have seen that requests are sent by clients to servers. We will now discuss what that request actually contains. The following is the format of INVITE request as sent by user1. INVITE sip:user2@server2.com… Continue Reading →

Known SIP responses

  1xx   :Informational Responses 100 Trying extended search being performed may take a significant time so a forking proxy must send a 100 Trying response 180 Ringing 181 Call Is Being Forwarded 182 Queued 183 Session Progress 2xx   :Successful Responses … Continue Reading →

Best practices for SIP NAT traversal

   By Adrian Georgescu Traversing NAT (Network Address Translation) is one of the issues that hinder SIP communications. Some background about the problem: With an ideal Internet, all devices would be able to communicate end to end without any intermediaries… Continue Reading →

SIP (Session Initiation Protocol)

SIP (Session Initiation Protocol) is a signaling protocol used to create, manage and terminate sessions in an IP based network. A session could be a simple two-way telephone call or it could be a collaborative multi-media conference session. This makes… Continue Reading →

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