|Best practices for planning and deploying SIP trunking for PSTN|
Preparing and planning:
· A very important part of preparation and planning is the choice of the provider. You need to find a provider that is the owner of the delivery medium that goes all the way to our premises besides the service. Quality of Service or QoS can be guaranteed only by the last mile providers.
· Often businesses are worried about your losing their DID or Direct Inward Dialing numbers and this is why they tend to retain the services of the PSTN service provider. However, if you are looking at hiring the services of a different provider, it is important to assess the possibilities of transferring the DID numbers and the time that would be taken for the same.
· You will also need to evaluate the service offerings for the SIP trunk a little more carefully as these services are mostly unregulated and even the pricing varies from one service provider to another.
· It is advisable to carry out a trial of the SIP trunk services prior to introducing the same into the production network of your business.
· It is very important for you to evaluate and compare the TDM (time-division multiplexing) service with the latest features of SIP trunk. This is mandatory if you wish to retain all the current features of your telephone network. Some of the features to which you must pay special attention to are Malicious Call Identification (MCID), Multilevel Priority and Preemption (MLPP), voice-band data (point-of-sale [POS] terminal, alarm systems, etc.), caller ID delivery, recording, and 911 call routing and solutions. These features might not be present with the SIP trunks or might work differently from the TDM trunks.
· You must ensure with your provider offers status monitoring along with troubleshooting. It is also important that you discuss the SIP trunk responsibilities with your provider.
Best practices in the Deployment are:
· It is imperative that you have a proper plan before the deployment of SIP trunk for our PSTN network. There is no point in rushing until and unless you are sure about what you are being offered. Thus, it is advisable to carry out a test of the SIP trunks and find out whether the call flows are smooth during the operation.
· You need to plan and mark the sites or user communities where SIP trunking will be deployed in phases. Barring the small sites, almost all the networks where the SIP trunking is deployed, a multi-phased deployment model is followed.
· You will also need to decide the call flows that would be incorporated for each deployment phase. For instance, you need to define the inbound, outbound, overseas, general calls or contact centre calls during every deployment phase. If you want to analyze or demonstrate ROI or return on investment then it is best to use the contact centre deployments. However, the call centre deployments are the toughest to validate as the call flows are the most complex. It is really easy to validate the general call flows but the ROI is longer. During the implementation, outbound calls can be safely said to be the easiest whereas you will need to resolve DID porting for the inbound calls.
· The costs associated with SIP trunk might vary from one service provider to another and from one country, region or continent to another.
About the author
Michelle Patterson is tech enthusiast with the latest developments and new technologies that are threatening and disrupting to change the way we stay in touch and communicate, particularly in business. She works with companies that are introducing these technologies to make understanding them easy for regular people.
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