
CIRCUIT PACKS
Code Name
Type
TN746, B Analog Line
Port
TN747B CO Trunk
Port
TN748C, D Tone Detector
Service
TN750, B Announcement Service
TN753
DID Trunk Port
TN754, B
Digital Line Port
TN755B Power Unit, Neon
Power
TN758 Pooled Modem
Service
TN760D
Tie Trunk Port
TN762B Hybrid Line Port
TN763B, C, D
Auxiliary Trunk
Port
TN767B
DS1/E1 Interface
Port
TN768
Tone-clock
Service
TN769 Analog Line
Port
TN771D
Maintenance/Test
Service
TN775B Maintenance Service
TN780 Tone-clock Service
TN1648 System Access/Maintenance Service
TN1650B Memory
Control
TN1655
Packet Interface
Control
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