Ascotel IntelliGate 2025/2045/2065
304 Call Routing Part 2
Terminals with a separate direct dialling plan down circuit from an Ascotel
IntelliGate system can also be addressed from the public or private leased-line.
From a routing technology viewpoint this corresponds to the situation "Routing
a call from the public / private network to the PISN" (see also the descriptions as
of page 335).
An S external interface (P-P or P-MP) can be used as the network interface.
The call charges are transmitted in ETSI format
5.4 Least Cost Routing (LCR)
Nowadays users usually have several service providers at their disposal to rely on
for routing their calls. To ensure that calls are routed as cost effectively as possible,
it make sense to select the service provider according to the call destination (e.g.
to use a different service provider for long-distance calls compared with local
calls).
A service provider will either have his own network or a licence agreement with
another network provider. A private leased-line network as defined for the LCR
function is a service provider with special characteristics.
In this chapter the term network provider will be used for both network providers
and service providers.
5.4.1 Direct or indirect Selection of the Network Provider
The network provider can be selected either manually for each call or automati-
cally using the LCR function.
The network of the required network provider can be reached directly or indirectly
from the PBX.
Direct Network Access
The PBX is directly connected with several networks operated by different net-
work providers.
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