What is SIP?
Session Initiation Protocol (SIP) is a virtual connection to the public switched telephone network and is used to signal and control communication sessions like VoIP calls. The capacity of a SIP trunk is equal to the capacity of bandwidth available between the customer and carrier.
What is PRI?
Primary Rate Interface (PRI) is a telecommunications interface standard used on an Integrated Services Digital Network (ISDN) for carrying multiple voices and data transmissions between the network and a user. PRI is a high-capacity service carried as T1 or E1 trunk lines between telco central offices and your location. PRI comes in 2 flavours T1 and E1. A T1 line carries voice and data via 24 digital channels while E1 carries 32 Channels. It delivers multiple lines of voice and data into a business’s existing PBX via one physical line.
SIP Trunking & PRI –
SIP trunking and PRI are two different ways of connecting your business to the PSTN (Public Switched Telephone Network).
Typically PRI and SIP Trunking require a piece of equipment in your office called a PBX (Private Branch Exchange). Most PBX can support both PRI trunk and SIP Trunking connections, either directly or with support of additional component.
SIP vs PRI –
Below table details on the difference between both the Voice communication technology types & SIP trunk vs PRI–
To know more about SIP vs PRI watch this video –