Call Accounting Featured Article

Know What You Need to Save with SIP

July 05, 2018

People are funny.

They make a New Year’s Resolution to eat better. But they find themselves eating pizza and ice cream a week later.

They go out shopping for something new. Then they buy another blue dress similar to what they on five hangers in their closet.

I’m not being judgy here. I’m just conveying a couple personal experiences that illustrate how people (like me) often we revert to the familiar ways of doing things.

The same thing often happens when businesses migrate to new solutions.

New architectures like the cloud and relatively new technologies like SIP promise to improve business outcomes. That may include lowering business costs. But getting the most out of new solutions often requires new ways of thinking.

For example, businesses moving from POTS lines to SIP circuits need to look at their actual usage. Instead, many just replace the number of POTS connections they have with the same number of SIP circuits. But that kind of approach doesn’t yield maximum benefits for the businesses involved.

Instead of just assuming they’ll need four SIP circuits if they have four PSTN lines today, businesses should do call accounting. That will help them to understand what they really need.

In doing so, they should investigate how many concurrent calls they must support during peak times. They should determine how much existing PSTN line traffic will go over the wide area network. And they should assess how much internet bandwidth will be required for their operation.

“The key metric of SIP traffic engineering is the number of concurrent calls needed,” explains ISI Telemanagement Solutions (News - Alert). “This not only equates to the way the service providers bill for PSTN SIP circuits. It relates directly to bandwidth required.

“To properly engineer the network at each phase of the deployment,” it adds, “you need to calculate the number of concurrent voice channels needed.”

Edited by Maurice Nagle