Lucent Technologies 9400 ATM-Circuit Emulation Service ATM-CES, ATM Wide Area Network PNC ATM

DEFINITY Enterprise Communications Server Release 8.2	Issue 1
Overview 555-233-002	April 2000
Private Networking Features
ATM-Circuit Emulation Service (ATM-CES)	108

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.