Companies are increasingly adopting Session Initiation Protocol (SIP) trunking to achieve a reliable, low-cost way to control multimedia communications over IP networks.
A recent report from the telecom marketing research firm Infonetics said the percentage of companies surveyed using SIP trunking will grow from 38% in 2013 to 58% in 2015, while the percentage using T1 lines will decline from 71% in 2013 to 55% in 2015.
This is no surprise at ShoreTel, which started introducing SIP-supported offerings in 2005. “ShoreTel is very bullish on SIP and we are seeing a steady increase in adoption,” said Rich Winslow, ShoreTel’s senior director of product management for patforms. “In almost every release we’ve enhanced our offering as the standard has evolved and more ITSPs (Internet telephony service providers) began offering the service.”
The benefits of SIP include:
- The ability to “burst” to a higher number of channels instead of being limited by PRI (Primary Rate Interface) capacity
- The ability to port local numbers and centralize SIP trunks, typically in geo-redundant datacenters, and save costs
- The ability to support easy failover between datacenters
- Integration into 911 ITSP offerings to ensure SIP trunk calls go to the correct PSAP (public safety answering point)
- Low cost, which can be enable Least Cost Routing throughout multiple locations in the enterprise
SIP can enable collaboration services by extending voice and video between an organization and the service provider’s network. Using SIP positions your organization to use the full suite of unified communications, including instant messaging, collaboration and presence.
“It’s a protocol designed to be used in the Internet age that is very flexible,” Winslow said. “It supports multiple levels of communications and is the underpinning of UC.”
ShoreTel has established a program for SIP certification with its Innovation Network, with more than 30 partners jointly participating, including large and small ITSPs, including ATT, CenturyLink, TelePacific, Time Warner Telecom, Verizon, Windstream and XO.
The SIP adoption bandwagon has just begun.