AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 298

NI-1 BRI Review
9. Contact the local service provider and determine what type of CO switch
serves your area (such as, AT&T 5ESS, Northern Telecom DMS-100, or
Siemens SSC EWSD). Enter this information under the Type of CO Switch
heading on page 2 of the form.
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 assigned two Directory Numbers (DNs) and two Service Profile
Identifiers (SPIDs) by the CO. Basic call handling is supported along
with the Calling 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
feature is assigned using the standard BRCS preconstructed features
/LICNDA and /CPCOFA. If it is possible, request /CPCPFA for the
Calling 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. See Appendix H, "NI-1 BRI
Provisioning" for detailed information.
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).
G–3
System Planning