General - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Scenario 3: A Dual-Location Company

General

The company uses the following general equipment to and applications to
provide basic functionality for the business:
Lines/Trunks. Both systems use Digital Signal 1 (DS1) T1 service
facilities, connected to the system by 100D modules (two at each
location). Each facility consists of 24 channels. A B-channel functions as
a line/trunk and is programmed for voice (analog service) or data (digital
service). In these systems, T1 channels provide tie-trunk service so that
employees can call extensions on the other system by dialing the
extension number. Data (Release 4.0 only) and voice tie trunks are
assigned to pools. T1 channels are also used for incoming and outgoing
WATS services, personal lines, emulated DID (Direct Inward Dial)
lines/trunks, and analog data transfer by modem or analog fax machine.
Digital data transfer (Release 4.0 and later) supports high-speed Group
IV fax machines, group videoconferencing, desktop videoconferencing,
and data exchange through ISDN terminal adapters.
T1 service offers better protection against toll fraud than does standard
loop-start or ground-start lines/trunks.
In addition, each location has one 408 GS/LS line/trunk and extension
module. Loudspeaker paging, Call Management System (CMS), and
Music on Hold connect to this module.
Extension Modules. The headquarters system uses six 008 MLX
extension modules to connect MLX telephones and digital equipment; the
West coast office uses five 008 MLX extension modules for the same
purpose. Each control unit includes a 016 tip/ring extension module
(Release 4.0 and later) for connecting modems, fax/modems, analog fax
machines, and automated answering applications.
Common Equipment. LANs equipped with shared modems, fax
modems, and ExpressRoute 1000 ISDN Terminal Adapters serve the
data communications needs of many employees at both sites. They also
share common-area fax machines, both high-speed digital Group IV and
analog devices.
General Extension Equipment. Each extension includes an MLX
telephone; single-line telephones are available for use in reception areas.
Most extensions include a PC or terminal connected to a LAN, sharing
LAN data modules and modems.
Fax Attendant 2.1.1. This Integrated Systems III (IS III) application
manages incoming and outgoing faxes in both locations, over digital and
emulated ground-start B-channels provided by the T1 service.
AUDIX Voice Power 2.1.1. (AVP). This IS III application supplies voice
mail and services at both sites. At headquarters, its Automated Attendant
answers calls to the site's main numbers.
Putting the System to Work
5–27