Polycom Vega Gateway - Manual (Page 25)

Version 2.1 16 March 2006 Page 25 of 33
Vega Gateway Scenarios. ©2005-2006 VegaStream Ltd.
Examples are given in best faith – ensure that you check the capabilities of systems before
deploying them, especially the functionality of devices not designed and delivered by VegaStream.
9.c FXS connection to a PBX
Considerations
• Out-dialled calls from the PBX can pass a dialled number to the Vega; it can use this to
decide which destination VoIP gateway to route the call to (i.e. multiple destination
gateways may be supported), and also which destination end-point to route the call to.
• Calls from the Vega to the PBX, are like calls from the PSTN – no dialled number is passed,
so typically the call will be routed to a receptionist or an auto attendant (or the FXS
gateway may just be used for outbound calls)
• May not be able to receive transferred calls – some PBXs will prevent calls being
transferred to a trunk interface.
9.d) FXO connection to a PBX
When making calls from VoIP to PBX the dialled number is passed using DTMF tones played into
the PBX.
Considerations
• An FXO device on an extension interface of a PBX can accept transferred calls, but as no
dialled number is presented to the gateway by the PBX, the gateway must be configured
with a static destination to route the call to.
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