QSIG is an ETSI standard for an ISDN protocol used for interconnecting PBXs. It allows features that normally only work on a single PBX (camp on, call back, etc.) to work seamlessly across a network of PBXs. These networks are sometimes called a: Private Integrated Services Network or PISN.

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Created by: admin, Last modification: Tue 19 of Feb, 2008 (17:07 UTC) by ohault
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