Some of the many advantages of using SIP Trunks instead of ISDN are:
COST: Your expensive ISDN solution will be replaced by a SIP Trunk.Which in most cases, equals to a significant cost saving solution with your monthly telephony bills.
REQUIREMENTS: The only requirement for switching to a SIP hosted PBX is that your current PBX system supports SIP trunks. This can easily be established. As not all PBX systems support the mentioned.
SOLUTION: We offer the opportunity to purchase an ISDN to SIP adapter too, if required. Allowing for full compatibility between your system, and the SIP Trunk.