Instruction manual

UPGRADES AND ADDITIONS
Port Circuit Pack Upgrades for DEFINITY Generic 3r
It may be necessary, depending on the features required for a particular upgrade, to upgrade
some of the port circuit packs. Table U lists the port circuit packs that may need to be upgraded
to a later vintage of the same circuit pack or to a different circuit pack, along with the cir-
cumstances that make the upgrade necessary.
TABLE U. Port Circuit Pack Upgrades
Type Code Upgrade Reason
Replace with lastest model of TN725 (for example, TN725B) for full functional-
ity.
Service TN725 Speech Synthesizer
TN748 or TN748B Tone
Detector
Replace with latest model of TN748 (for example, TN748C) if the Outbound
Call Management (OCM) feature is required for the system.
Replace all TN714 models with TN768 Tone Clock for full functionality. If Stra-
tum 3 interface is required in the PPN, replace with TN780 Tone Clock.
TN714 Tone Clock
Replace all TN741 models with TN768 Tone Clock for full functionality. If Stra-
tum 3 interface is required in the PPN, replace with TN780 Tone Clock.
TN741 Tone Clock
Replace all TN756 models with TN768 Tone Clock for full functionality. If Stra-
tum 3 interface is required in the PPN, replace with TN780 Tone Clock.
TN756 Tone Clock
Replace all TN776 models with TN570 Expansion Interface for connection to
Switch Node Interface.
TN776 Expansion Interface
Replace with latest model for full functionality.TN775 EPN Maintenance
Replace TN762 with TN762B or later model for 7300 sets and if dropping
incoming calls.
Line TN762 Hybrid Line
Replace TN747 with TN747B or later model if ACD is required for the system.Trunk TN747 Central Office Trunk
Replace TN760 with TN760B vintage 6 (or later model) if CAS is required for
the system and if there is an end-to-end signaling problem.
TN760 Tie Trunk
Replace TN763 with latest model if Audichron Announcement Equipment is
included in the system.
TN763 Auxiliary Trunk
Replace TN722 with TN722B vintage 6 (or later model) if CAS is required for
the system.
TN722 DS1 Tie Trunk
Replace with the latest model of TN464 32-Channel E1 Trunk if ISDN-PRI and
the DS0 channel are required for the system. TN767 can be reused if only DS1
or NFS in-line service are required.
TN767 DS1 Interface
142