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DEFINITY ProLogix Solutions Release 2 Overview 

555-235-100

Issue 2 June 1999 10-15

DEFINITY ProLogix Solutions supports a variety of interfaces to voice and data networks. Trunks supply 
links between DEFINITY ProLogix Solutions, the public network, and other switches. DS1 interfaces offer 
high-speed digital connectivity between switches.

Trunks provide the communications links between DEFINITY ProLogix Solutions and other switches, 
including central office switches and other premises switches. Trunks that perform the same function are 
grouped together and administered as trunk groups. Trunks interface with DEFINITY ProLogix Solutions 
via port circuit packs. DEFINITY ProLogix Solutions’ trunk group circuit types include the following.

Local exchange trunks connect DEFINITY ProLogix Solutions to a central office. 
The following are some of the types available:

central office trunks, which connect DEFINITY ProLogix Solutions to the local 
central office for incoming and outgoing calls

foreign exchange trunks, which connect DEFINITY ProLogix Solutions to a 
central office other than the local one

Wide Area Telecommunications Service trunks, which allow you to place long-
distance outgoing voice-grade calls to telephones in defined service areas, priced 
according to distance in the service area, length of the call, time of day, and the 
day of the week