Instruction manual

GLOSSARY
Remote Access Barrier Code
Used with remote access trunks to limit access to the System. When a call comes in on
a remote access trunk, the user may be required to dial a barrier code to gain access. If
the user dials an invalid barrier code, the call is muted to intercept. A barrier code has
an associated COR that defines call restriction features and a COS that defines feature
restrictions. The use of barrier codes is a customer option. If barrier codes are used,
they apply to all remote access trunk groups in a given system. If they are not required,
the default barrier code’s COR is used. There may be more than one barrier code in the
system.
Remote Home Numbering Plan Area Code (RHNPA)
A foreign numbering plan area code that is treated as a home area code by the ARS
feature. Calls can be allowed or denied based on the area code and the dialed central
office code rather than just the area code. If the call is allowed, the ARS pattern used for
the call is determined by these six digits.
Removable Mass Storage Subsystem (RMSS)
A tape storage device that stores the software information for the system.
Reorder Tone
A fast-busy tone repeated 120 times a minute; indicates that at least one of the facilities,
such as a trunk or a digit transmitter, required for the call was not available at the time
the call was placed.
Restricted Call List
A list of digit strings that can be assigned to any COR.
Routing Pattern
A routing pattern is a list of up to
six
trunk groups that ARS and AAR use to try to select
a trunk when muting outgoing calls. There are a maximum of 254 routing patterns that
can be assigned. The patterns can be shared between the AAR and ARS features.
Trunk groups are arranged in the routing pattern in descending order of desirability (most
desirable first). If the first choice route (usually the least expensive facility) is unavail-
able, a call is attempted over the second choice route. This procedure continues until an
available route is found, or all muting preferences are exhausted.
G-23