Lucent Technologies 555-661-150 manual Def E, Pstn

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
1 Introduction
Tandem Trunking and Tandem Switching	Page 1-16

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ML A

PRI PRI

ML C

DEF E
PRI	PRI

ML B

ML D

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Figure 1–6. Star Configuration: Five Systems

Figure 1–6 again shows the star configuration we looked at earlier in this chapter. All systems enjoy the advantages of PRI tandem trunks, which are made possible in this larger private network by the greater line capacity of the hub DEFINITY ECS or DEFINITY ProLogix Solutions, System E. In this private network, the systems may be spread across thousands of miles and realize considerable toll savings on intersystem calls and long-distance ARS calls. Although not shown, each system has its own voice mail/automated attendant system because the MERLIN LEGEND systems and the DEFINITY system cannot share voice messaging systems.