Lucent Technologies 5 manual Modes of Operation

MERLIN LEGEND Communications System Release 5.0	Issue 1
System Manager’s Guide 555-650-118	June 1997

2About the System ê

Modes of Operation Page 2-15

T1 Voice Operation. A “line” can be programmed through the system, without the services of a telephone company installer, to emulate a ground-start, loop-start, tie, or DID trunk. This type of T1 operation also gives you access to special services, such as inbound 800 or WATS service for incoming, toll-free service for voice calls. Only this type of T1 operation is available in releases prior to Release 4.0.

NOTE:

While you can quickly and easily change the type of line that a channel imitates, you must coordinate the change with the T1 provider so that both ends of the connection are set up for the same type of line/trunk.

T1 Data Operation. Available in Release 4.0 and later systems, T1 data operation allows high-speed data communications over the public switched network; this is called T1 Switched 56 service. It also provides data tie “lines” to connect one MERLIN LEGEND Communications System to another or to a DEFINITY system. A T1 data-operation “line” is a channel.

Primary Rate Interface (PRI) Operation. The 24 “lines” include 23 B-channels. Each B-channel can dynamically provide voice and data services; one D-channel carries signaling information for the B-channels.

NOTE:

Facility is a general term that designates a communications path between a telephone system and the telephone company central office. Specifically, we refer to digital facilities (sometimes called pipes). Technically, a trunk connects a switch to a switch, for example, the MERLIN LEGEND Communications System to the central office. Technically, a line is a loop-start facility or a communications path that does not connect switches, for example, an intercom line or a Centrex line. However, in actual usage, the terms line and trunk are often applied interchangeably. In this guide, we use lines/trunks and line/trunk to refer to facilities in general. We also use specific terms such as personal line, ground-start trunk, DID trunk, and so on. When you talk to your local telephone company central office, ask them which terms they use for the specific facilities they connect to your system.

Modes of Operation 2

The system’s mode of operation determines the following:

■The types of outside trunks that can be connected to the system

■How users access outside trunks

■The types of system operator consoles that your business can use