AT&T MERLIN LEGEND Release 4.0 Feature Reference page 84

Feature Reference
NOTE:
Multiline Hunt is not part of the IOC package S. If Multiline Hunt is needed, you
need to order the appropriate feature and inform the central office of the switch
settings in Appendix H of System Planning that you need.
Digital Subscriber Line (DSL)
A Digital Subscriber Line provides full-duplex service on a single twisted pair
wire (two-wire) at a rate sufficient to support ISDN Basic Rate Access. Digital
Subscriber Line (DSL) is used to refer to the facility from the central office that
supports BRI service.
Called Party Number (CdPN)
In general, the term Called Party Number (CdPN) is a telephone number that
was dialed to reach a destination. However, while routing the call, the network
can change the Called Party Number to make routing easier. In either case, the
network sends the Called Party Number to the system when a call arrives at the
system. The called party number is usually displayed on the second page of the
MLX display.
Calling Party Number
The Calling Party Number (CPN) provides incoming calling party number
information that identifies the originator of a call in the call-handling displays of
MLX telephones. If the MERLIN LEGEND Communications System subscribes to
this BRI feature, each incoming call to the system over a BRI line can be
accompanied by the calling party number or by the billing number of the calling
party supplied by the network.
NOTE:
If the calling party subscribes to the central office Directory Number Privacy
feature, no number is received.
Service Profile
A Service Profile (SP) defines the interface on a BRI line between the central
office and an ISDN terminal. It specifies the parameters and their values
necessary to provide services to the terminal.
ISDN Ordering Code (IOC)
The ISDN Ordering Code (IOC) is defined by Bellcore as part of the National
ISDN Package. The IOC defines a number of capabilities for the BRI
connection, which are aimed at different user applications. The MERLIN
LEGEND supports the IOC "S" capability package. IOC "S" supports circuit
switched voice and data calls over both B-channels with a Calling Party Number
identifier.
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Basic Rate Interface (BRI)