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ATM-Circuit Emulation Service (ATM-CES)
DEFINITY Enterprise Communications Server Release 8.2
Overview
555-233-002
Issue 1
April 2000
ATM-Circuit Emulation Service
(ATM-CES)
ATM-CES (Circuit-Emulation Service) lets the DEFINITY ECS emulate an ISDN-PRI
trunk on an ATM facility. These virtual trunks can serve as integrated access, tandem, or
tie trunks. ATM-CES trunk emulation maximizes port network capacities by consolidating
trunking. For example, the CES interface can define up to ten virtual circuits for tie-line
connectivity, consolidating onto one circuit card network connectivity that usually requires
multiple circuit packs.
ATM Wide Area Network PNC (ATM
WAN-PNC)
ATM Wide Area Network (ATM WAN) extends the Port Network Connectivity (PNC)
beyond a single ATM switch. This allows you to utilize either a private ATM network, public
WAN, or a combination of both. Several networked ATM devices can be used as
effectively as a single ATM switch for inter-port network connectivity. ATM WAN is
supported by the "Multiple Location" feature, where port network cabinets can be
administered as separate locations; however, it is not required. You can use multiple ATM
switches without multiple locations administered.
Distributed Communications System
(DCS)
Distributed Communications System (DCS) allows you to configure 2 or more DEFINITY
switches as if they were a single, large DEFINITY ECS. DCS provides attendant and
voice-terminal features between these switch locations. DCS simplifies dialing
procedures and allows transparent use of some of the DEFINITY ECS features. (Feature
transparency means that features are available to all users on DCS regardless of the
switch location.)
See also, ‘‘Centralized Attendant Service’’ on page 47.
See also, ‘‘Inter-PBX Attendant Calls’’ on page 48.
233002_1.book Page 108 Monday, February 21, 2000 8:28 AM