Call routing
163
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
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 traffic. Other topics
include Least Cost Routing, exchange-to-exchange traffic, transit routing in the pri-
vate leased-line network, overflow routing and break-out.
6. 1 Overview
This chapter is divided as follows:
• Internal traffic
(as of page 163)
• Incoming traffic
(as of page 168)
• Outgoing traffic
(as of page 191)
• Least Cost Routing (LCR)
(as of page 207)
• Exchange-to-Exchange Connection
(as of page 224)
• Transit Routing in the Private Leased-Line Network
(as of page 237)
• Testing overflow routing in the PISN
(as of page 246)
• Break-Out
(as of page 251)
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 op-
tions.
Tab. 23 Internal destinations and their availability
Internal destinations Remarks
Internal users assigned one or more terminals: Selectable using number and name selection
• Digital system phones
• Terminals on the S bus
• Analogue terminals
• Mitel SIP terminals and standard SIP termi-
nals
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