Session initiation protocol (SIP) is the technology and the standard that empowers Voice over Internet Protocol (VoIP) within modern businesses. SIP trunking is the process by which this technology is applied to VoIP systems: SIP trunks replace traditional telephony trunks to bring enhanced communications to both IP networks and legacy systems.
By partnering with a SIP trunk provider, you can achieve automated and streamlined routing, offer higher-quality employee experiences, and also enable significant savings.
With SIP trunk over a high-speed internet, you can access Vonage cloud capabilities on your traditional PBX. You can even keep your phones. As a top SIP trunk provider, Vonage Business offers private SIP interoperability with Cisco® Call Manager, Avaya®, Asterisk®, Zultys®, and more.
Many primary rate interface (PRI) systems require the purchase of 23 channels at a time. SIP trunks can be purchased individually so scaling up or down is simple. As a top SIP trunk provider, we also design solutions to handle high call volume and automatic call rerouting, vital to your service if there’s problem on a circuit.
SIP VS. PRI
Virtual connection (voice & data transmission)
One at a time purchase (good scalability)
Business continuity/disaster recovery via automatic call rerouting in the cloud
Little to no hardware investment for deployment
Physical connection over a dedicated line (only voice transmission)
Requires purchase of up to 23 channels at a time
Call diversion and rerouting possible (complex setup and expensive maintenance)
Up-front investment in hardware for deployment
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