Archive for: Blog

3KeyLogic Annual Holiday Party

January 18, 2013 by key3

Keith V 13KeyLogic founder and CEO Keith Vonnahme addressing employees and guests at the 3KeyLogic Holiday Party at the Hyatt Regency – Columbus on January 5th, 2013.







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University of Cincinnati Career Fair

September 27, 2012 by key3


Senior Engineer Ed Simson speaking with a potential engineer candidate at the University of Cincinnati Technical Career fair. We visited several campuses in southern Ohio this week in search of the very best future Network Engineer candidates.






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What Is SIP? (Part 1)

July 10, 2012 by David James Peterson

If you inhabit the IT landscape, whether as an administrator or an IT professional, you have no doubt heard rumblings about SIP technology. But just what is SIP and what do you need to know about it? This is the first in a series of articles about SIP, its benefits and implementation strategies.

SIP, or Session Initiation Protocol, is a protocol that has been around for almost 15 years. Not until recently has it gained widespread acceptance within the business enterprise environment. Momentum is starting to build as the benefits of SIP become too compelling to ignore.

SIP technology has many benefits to businesses, not the least of which is the potential for cost savings. That savings can be significant in an environment that currently uses POTS (traditional copper phone lines) to transmit and receive a high volume of phone calls. With POTS, call volume is limited to the number of copper wire pairs that run in to your building. One pair – one call.

Most businesses currently manage phone traffic over expensive T1 lines (used for traditional digital telephone systems), or a PRI (Primary Rate Interface) on an ISDN system. A single T1, which may be in the form of copper or fiber-optic cabling, can carry 23 concurrent phone calls. If during peak call times, it is conceivable that inbound and outbound calls could exceed that capacity, the business will need to purchase additional T1’s (each adding 24 additional channels) for those times that additional capacity is needed. In an organization with multiple locations, this process is typically repeated at each location to guarantee sufficient capacity. It becomes apparent that these costs can quickly add up, often on capacity that is only rarely utilized.

With SIP, call capacity is determined by available bandwidth. Phone devices that are set up in the SIP realm are essentially devices with IP addresses, connecting to your internal network in the same way that your computer connects to the internet. Though it is a bit of an over-simplification, as long as there is adequate bandwidth available, your call capacity is potentially unlimited.

In a multi-location businesses, the entire enterprise WAN can be interconnected by SIP trunks, which allows all internal calls to be carried on the corporate network, eliminating traditional phone lines altogether for in-network calls. Since the world of telecommunications does not run entirely on SIP (at least not yet), outside calls may still get from point A to point B through a combination of SIP and PSTN transmissions, perhaps converting several times along the way.

Additional major cost savings that the multi-location enterprise may realize is the ability to share call capacity across the enterprise. With SIP, the enterprise purchases the number of sessions or concurrent call paths (CCP’s) it needs and those CCP’s can then be shared among all locations. If one location is experiencing unusually high call volume, it can pull from the pool of shared CCP’s that are not being used. In an environment with 50 or more locations, the additional savings achieved through pooling concurrent call paths can be significant. This also plays well with enterprises with locations in multiple time zones, where peak calling activity is staggered throughout the business day.

In addition to reduced phone line service costs, SIP enabled VoIP phone systems can reduce costs by utilizing existing data networks, converging both voice and data traffic onto one single cable. This means that current network infrastructure may be adequate to handle the addition of HD voice and even video conferencing traffic without the need for wholesale network replacement or a completely separate wiring infrastructure. Many modern PBX systems are already SIP capable or can be adapted for SIP compatibility, eliminating the need for replacement of much of your company’s existing telephone system.



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