ITAD Subscriber Numbers
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ITAD Subscriber Numbers, or ISNs, provide a way of interconnecting
VOIP Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet t ...
PBXs by adding a number to the internal phone number of the target phone. The ITAD number is added to the target phone number preceded by an asterisk. Therefore, only numbers and symbols which appear on a telephone keypad are used.


References

Telecommunications {{Telecomm-stub