Conversions: Introduction-000
363-205-401
Page 2 of 4
Issue 7, March 1997
from one feature package to another varies, but is usually done because of changes
in customer service requirements or enhancements to central office switching
equipment. The amount of preconversion testing and preparation depends mostly on
why the conversion is necessary. For example, converting a FPA to FPC to add
special service capability does not require any preparation. Converting a Feature
Package D (FPD) to an integrated FPB mode 2 for an office cutover may require
extensive testing. In any case, all of the pre-conversion activities take place at the
central office/digital facility end of the system, with the exception of grooming.
Grooming of special service circuits may be required when converting to an
integrated FPB Mode 1 or Mode 2 system or a universal FPB Mode 2 system. A
mode 2 RT has channel slot (right 4 slots per digroup) restrictions. The non-switched
circuit may have to be rerouted for integrated systems. 363-205-402 Channel Unit
Installation TOP provides the procedures to provision special services channel units.
This type of grooming and preservice testing of rearranged digital facilities are the
only preconversion activities required at the RT. This document assumes all
preconversion activities are completed and provides only the procedures necessary
to convert an RT system's feature package equipage. 363-205-108 document
provides Automatic Office to Office testing procedures used prior to converting a FPA
or FPC to FPB Mode 1 system configuration.
Service Interruption
Some conversions do not interrupt service while others will interrupt service for the
whole RT system. The procedures in this Tab are separated into the amount of
service interruption caused by the conversion activity. The following is a summary of
the severity of service interruption:
• None. These conversions do not affect active calls
FPA to FPC or FPC-AutoCut,
FPC to FPC-AutoCut,
FPB Mode 2 without special service to FPB Mode 2 with special service.
• Temporary. These conversions affect active calls on 1 or 2 digroups only when
common circuit packs are replaced (how long it takes to replace the pack). Ser-
vice to the system will be down while both ends change configurations. These
procedures require CO personnel to perform conversion procedures at the same
time to minimize down time. Universal systems can be converted very quickly
while integrated systems take longer.
FPB Mode 2 to FPB Mode 1 with/without special service.
FPB Mode 1 to FPB Mode 2 with/without special service.
FPB Mode 1 without special service to FPB Mode 1 with special service. This
does not require CO personnel and only affects digroup A.
• Total down time. These conversions affect active calls on all digroups until both
ends complete conversion activities.
FPD to any other feature package.
