2N VoiceBlue Enterprise - User Manual - Manual (Page 69)

Insight into VoIP Gateway 5-7
5.3. Routing
For the purpose hereof, routing means a process of retrieving a
route from the calling party to the called one. There are various
routing methods according to the type of call and place from which
the call is coming.
Within VoIP Network
Speaking of routing within a single VoIP network, we think of the
activity executed by the PBX whenever a registered user initiates a
new call. The result of this process is a route to another registered
user based on the called number analysis. The called number can
be an IP telephone, GSM gateway, PSTN gateway, another VoIP
PBX, etc.
VoIP PBX
(SIP proxy /
gatekeeper)
…
Fig. 25 – Call Routing by VoIP PBX
The routing options are dependent on the capabilities of the
particular PBX. For SIP-based telephones, a SIP proxy server built
in 2N VoiceBlue Enterprise can be used as a PBX. For details refer
to Subsection 0.