| 单词 | PISN (Private Integrated Services Network) |
| 释义 | PISN (Private Integrated Services Network) A private version of Integrated Services Digital Net- work (ISDN). A PISN makes use of the QSIG (Q Signaling) standard that defines services and signaling protocols for interconnecting TDM-based PBXs based on the ITU-T ISDN standard Q.931. See also ISDN, PBX, and QSIG. |
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