AT&T 2500 series, 7500 series, 7100 series, 7200 series Release Link Trunk Networks CAS and ACD

5-12ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES

____________________________________________________________________________________________________________________________
_
			AT&T SDN
		(4) DATA BASE
		QUERY	NCP
	(3)	(5) BILLING &
ETN		ROUTING
	346-1234
		INSTRUCTIONS
		PNI
		ACP		ACP
(2)		SO	(6)
346-1234			ROUTE	(7)
			CALL	1234
					SDN
				SO	DIRECT
					ACCESS
(1)
8-346-1234
					1234
					346

Figure 5-7.Call Flow ETN - to - SDN

7.The egress ACP routes the call to the destination switch, which rings the terminal indicated by the extension number it receives.

Release Link Trunk Networks — CAS and ACD

Centralized Attendant Service (CAS) and Automatic Call Distribution (ACD) are features that use release link trunks (RLTs) in their operation. Like tie trunks, RLTs connect communications systems. Unlike tie trunks, which carry calls from their initiation to completion, RLTs provide only a temporary service for the call. That is, RLTs carry calls from their originating switches to the switch where the attendants or agents are located. Upon receiving the call, the attendant or agent identifies the call destination, returns the call to the switch of origin for routing and processing, and, then, disengages the RLT, readying it for another call.

Release link trunk network software and ETN software can work together in the same network without interference. However, the ETN (Standard Network) package or the Private Network Access package is not required for release link trunk network operation.

For Centralized Attendant Service and Automatic Call Distribution capacities and administration details, refer to DEFINITY® Communications System, Generic 2 and System 85, Feature Descriptions (555-104- 301), DEFINITY® Communications System, Generic 1 and System 75, and System 75 XE, Feature Descriptions (555-200-201), and DEFINITY® Communications System, System 75 and Generic 1.1 (555- 204-654).