Lucent Technologies DEFINITY ProLogixTM Solutions 555-235-100 - Manual (Page 195)

10 Main/Satellite/Tributary
DEFINITY ProLogix Solutions Release 2 Overview 555-235-100 Issue 2 June 1999 10-23
Main/Satellite/Tributary
If you have modest network requirements, a main/satellite/tributary configuration is an attractive possibility
for private networking. In this configuration, one DEFINITY ProLogix Solutions location is the main, and
remote switches are satellites or tributaries. Attendant positions and public network facilities are usually
concentrated at the main.
All calls to or from a satellite pass through the switch at the main. The system appears to be a single switch
with one listed directory number. A uniform dial plan provides a common 4-digit or 5-digit dial plan for a
main/satellite configuration.
A tributary is similar to a satellite, but it has one or more attendant positions and its own listed directory
number. Calls to its listed directory number go directly to the tributary.
The switches in a main/satellite/tributary network are connected by tie trunks. Trunks and switching
facilities can be added as requirements grow.
An important DEFINITY ProLogix Solutions’ networking feature is Main/Satellite Extended Trunk Access.
Extended Trunk Access allows dialed digits that are undefined at a satellite or tributary switch to be routed
over a trunk group to a main switch for interpretation. This flexibility means changes to the network
numbering plan do not have to be propagated to all switches. Extended Trunk Access improves your control
and reduces administration costs by making trunk networks considerably easier to maintain.