coM.sat ISDN Basic
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16/01/09 48 coMsat ISDN Basic Manual V2.7.doc
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3.3.12 Virtual PBX
Figure 18: Virtual PBX
3.3.12.1 General Information
The virtual PBX features extend the gateway functionality by the supplementary
services:
• call hold
• call retrieve and
• call transfer.
It can be used in combination with a dedicated PBX system or as a standalone
solution. Unlike standard PBX applications the virtual PBX allows to configure GSM
callers to be handled as internal callers (see also 3.3.3), so that also the GSM caller
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