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Types of trunks which can be assigned in System 25 are:
● Central Office, which provide a link with the local telco for incoming and outgoing
calls (LS/GS)
●
Foreign Exchange (FX), which connect to a CO other than the local CO for high
volume calling from a distant location
● Wide-Area Telecommunications Service (WATS), which connect to an Outward
WATS office or a dial “800” Service Office
●
Direct Inward Dial (DID), which provide incoming service from a CO to directly
access a station or facility (STARLAN NETWORK interface, trunk group)
●
Tie trunks, which provide a link with another private switching system.
To support efficient utilization of this rich set of network options, System 25 provides the
functions outlined in the Outgoing and Incoming Business Communications sections.
Conclusions
System 25 has been targeted at providing excellent small business communications capability
at the right price. The thousands of systems in service in the first year of production have
confirmed that these capabilities are an excellent match with small business customers’
communications needs.
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