System Functions and Features as of I7.9
Call routing
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5. 6
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 an-
other network provider. A private leased-line network as defined for the LCR func-
tion 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. 6. 1
Direct or indirect Selection of the Network Provider
The network provider can be selected either manually for each call or automatically
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 network
providers.
Fig. 78
Direct access to network A or B using LCR
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