Call routing
177
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
6 Call routing
This Chapter describes the interplay between the routing elements for the
various types of traffic: call routing for internal, incoming and outgoing traf-
fic. Other topics include Least Cost Routing, exchange-to-exchange traffic,
transit routing in the private leased-line network, overflow routing and
break-out.
6. 1 Overview
This chapter is divided as follows:
• Internal traffic (as of page 177)
• Incoming Traffic (as of page 182)
• Outgoing traffic (as of page 206)
• Least Cost Routing (LCR) (as of page 222)
• Exchange-to-Exchange Connection (as of page 241)
• Transit Routing in the Private Leased-Line Network (as of page 256)
• Testing overflow routing in the PISN (as of page 265)
• Break-Out (as of page 270)
6. 2 Internal traffic
6. 2. 1 Internal Destinations
Many internal destinations are allocated numbers in the internal numbering plan.
These destinations are dialled directly by dialling these numbers or the names allo-
cated to them.
The table below shows the internal destinations, their availability and their dialling
options.
Tab. 39 Internal destinations and their availability
Internal destinations Remarks
Internal users assigned one or more termi-
nals:
Selectable using number and name selection
• Digital system phones
• Terminals on the S bus
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