SIP Trunking is a virtual connection that replaces the traditional telco ISDN-PRI or business telephone line services and thus allow you to connect your PBX to be able to make and receive calls to others outside your office. With an increase in companies installing Asterisk, 3CX, Microsoft Teams, FreeSwitch and more, this has grown to become one of fastest growing telecom markets. AstraQom is a proud leading USA SIP Trunk provider.