Firms moving from TDM to SIP trunks, says survey

Firms moving from TDM to SIP trunks, says survey [Image: Bill Oxford via iStock]

Companies are migrating from time-division multiplexing (TDM) to session initiation protocol (SIP) trunks, but some are also adopting cloud services rather than hosting their systems on-premises, according to the SIP Survey 2016.

Conducted by the SIP School, the survey was undertaken to document the most common issues that occur during SIP trunk implementations and what can be done to help mitigate these issues.

According to the survey, most of the more than 900 survey respondents, who varied from internet telephony service providers to actual customers, were familiar with SIP trunking. Some 39 per cent are currently using SIP trunks, whilst 40 per cent are SIP trunk providers.

Respondents indicated that “issues on the edge” of adopting hosted Voice over Internet Protocol (VoIP) solutions, including improperly configured firewalls, were the most common problem faced, with 27.49 per cent saying it affected them.

The second most common issue troubling businesses was the quality of calls, with some struggling with dropped calls and time delays. A total of 22.81 per cent of survey respondents said that was a problem for them.

Meanwhile, the initial configuration and roll-out of hosted VoIP solutions caused headaches for 19.88 per cent of those responding.

There is variation in the services and infrastructure accompanying SIP trunking, the survey revealed. The SIP School found that 57 per cent of companies responding used Multiprotocol Label Switching (MPLS), while 50 per cent use the internet. A further 12 pre cent also use software-defined wide area network (SD-WAN).

The SIP School said: “SD-WAN may accelerate the adoption of these ‘raw’ internet connections (to the demise of MPLS) especially if a company can install a couple of connections (from different providers) and let the ‘intelligent’ edge devices decide on which route packets will take based on a whole number of metrics such as availability, load, delay, jitter and so on.”