User manual

MX-ONE SYSTEM DESCRIPTION
38 21/1551-ASP 113 01 Uen N2 2014-01-28
Figure 13:Centralized attendant
4.4.2 Least Cost Routing
The Least Cost Routing (LCR) feature enables MX-ONE Telephony
System to select the most economical route for an outgoing public call.
The system checks the dialed number to see if the private network can
be used, and if that is the case, the call is routed to a PBX within the
private network as close to the public destination as possible.
The following three situations can occur:
• The dialed destination shall be routed directly to the public network.
• The dialed destination is an extension within the own system (i.e.
off-net to on-net routing).
• The dialed destination is in the private network and can be reached
completely through the private network (off-net to on-net routing).
• The dialed destination can be reached partly through the private
network (tail- or best-end hop-off).
The user first has to dial an LCR access code to activate the LCR. The
system is then ready to analyze the dialed number.
4.4.3 Alternative Routing
The alternative routing feature makes it possible to reach an external
destination through different routes. A primary choice route can have up
to seven alternative routes to reach the external destination.
If the primary route is not available, or if a class of service does not
permit the call on this route, the system tries to use the first alternative
route and so on. If necessary, the system modifies the dialed number
(add pre-digits or delete dialed digits or both) to suite the number to the
numbering plan used in the exchange at the other end of the alternative
route.
For an example where a user in system 1 wants to call a user in system
3, the system first tries to find the direct route (alternative 1), but if all
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