AT&T MERLIN LEGEND Communications System Key System Planning Forms Errata Instruction Manual download pdf (Page 311)

MERLIN LEGEND Communications System Release 5.0

System Planning

555-650-112

Issue 1

June 1997

NI-1 BRI Review

Page G-3

10.Determine which type of configuration is best suited for your system. Some

guidelines for selecting the service configuration are shown below:

■

IOC capability package “S”

Each BRI line, also called a Digital Subscriber Line (DSL), consists of

two B-channels, both of which support voice and data calls. In order to

have two simultaneous voice or digital data calls, each DSL must be as-

signed two Directory Numbers (DNs) and two Service Profile Identifiers

(SPIDs) by the CO. Basic call handling is supported along with the Call-

ing Party Number/Billing Number (CPN/BN) identification feature. No

packet data capabilities or hunting features are provided.

NOTE:

On the AT&T 5ESS switch, the Calling Party Number identification fea-

ture is assigned using the standard BRCS preconstructed features

/LICNDA and /CPCOFA. If it is possible, request /CPCPFA for the Call-

ing Number Identification feature from your local service provider as it

provides a clearer display of the CPN information.

IOC package “S” supports a maximum of one call per telephone number

(DN) at any given time. If another call comes in on that line, the caller

gets a busy signal.

For Canada and those areas of the United States where IOC package

“S” is not available, the capability package that is ordered must provide

alternate voice/circuit-switched data on both B-channels with no packet

data capability or supplementary voice features except for the CPN/BN

feature if available. Appendix H, ‘‘

NI-1 BRI Provisioning’’ for detailed in-

formation.

■ Multi-Line Hunt (MLH)

This feature is not part of the IOC package “S” and must be provisioned

separately.

One or more BRI lines (and their associated DNs) are grouped together

with one (main) telephone number. When an incoming call arrives at the

main number, the CO searches through the DNs until an available line is

found.

NOTE:

Each DN in the MLH group can be dialed directly, but hunting may not

be initiated (depending on the CO switch).

For the Siemens SSD EWSD switch, each MLH group must be assigned

as either voice or data; alternate voice/data is not supported as mixing

the two types in one group could create call interference. This constraint

does not apply to the AT&T 5ESS or the Northern Telecom DMS-100

switches.

The administration for Multi-Line Hunt is CO switch dependent. The

AT&T 5ESS and Siemens SSC EWSD switches provide hunting through

the Series Completion feature. The Northern Telecom DMS-100 switch

provides hunting through the Multi-Line Hunt Group (MLHG) feature.

Contact the local service provider to determine what type of switching

equipment is in use and check the appropriate box under the MLH sub-

heading of the Service Configurations section on page 2 of the form.

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