ITAD Subscriber Numbers
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ITAD Subscriber Numbers, or ISNs, provide a way of interconnecting
VOIP Voice over Internet Protocol (VoIP), also known as IP telephony, is a set of technologies used primarily for voice communication sessions over Internet Protocol (IP) networks, such as the Internet. VoIP enables voice calls to be transmitted as ...
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 will be used.


References

Telecommunications {{Telecomm-stub