Lucent Technologies DEFINITY ProLogixTM Solutions 555-235-100 - Manual (Page 187)

10 Network Interfaces and Equipment
DEFINITY ProLogix Solutions Release 2 Overview 555-235-100 Issue 2 June 1999 10-15
Network Interfaces and Equipment
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.
Trunk Group Circuits
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 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