Connections
SIP
Calls Per Line:
unlimited
Requirements
High speed internet connection
The Session Initiation Protocol (SIP) is a signaling protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP).
PRI
Calls Per Line:
23
Requirements
PRI to SIP conversion device
The Primary Rate Interface (PRI) is a standardized telecommunications service level within the Integrated Services Digital Network (ISDN) specification [...]
Branch Exchange, E1, PBX, T1