When should a business use SIP channels?
Businesses should consider purchasing SIP Trunks when they decide that their needs are best met with a premise-based system. This system is often referred to as an IP-PBX. Coupled with SIP Trunks, an IP-PBX serves up similar features to hosted solutions.
SIP Trunks typically save business customers money over a hosted solution since SIP channels can serve the needs of three to four employees (depending on oversubscription), while a hosted seat is needed for each employee.
SIP Channels vs. PRIs
SIP Trunks realize their primary benefit over PRIs from cost savings. SIP trunks typically cost half of what a PRI does for unlimited inbound and local calling along with lower cost long distance. Together with line oversubscription (e.g. a 30 person company purchasing just as many SIP trunks as they anticipate having concurrent calls which is typically 8 to 10), SIP Trunks are a very cost effective way for a business to save money.
Lastly, a primary benefit of SIP Trunks over PRIs is that SIP Channels can be purchased in increments of 1, whereas PRIs have to be purchased in increments of 23 channels.