Instruction manual

UPGRADES AND ADDITIONS
System 75 Upgrade to DEFINITY Generic 1 EPN Without
Duplication
The System 75 Medium Cabinet is upgraded to the EPN Cabinet Without Duplication by:
Removing the tape drive unit
Removing the J58890AA-1/J58890AB-1 Control Carrier
Installing the J58890AF-1 expansion Control Carrier
Replacing TN741 Tone Clock circuit pack with a TN768 Tone Clock circuit pack
Adding TN775 Maintenance circuit pack
Replacing the TDM cables with new WP91716 L1 and L2 TDM/LAN cables
Adding and restructuring the port circuit packs as required
A TN776 Expansion Interface circuit pack is added to the PPN cabinet. A fiber link connects the
Expansion Interface circuit packs.
System 75 Upgrade to DEFINITY Generic 1 EPN With Duplication
The System 75 Medium Cabinet is upgraded to the EPN Cabinet With Duplication by:
Removing the tape drive unit
Removing the J58890AA-1/J58890AB-1 Control Carrier
Installing the J58890AF-1 expansion Control Carrier
Replacing TN741 Tone Clock circuit pack with two TN768 Tone Clock circuit packs
(one in the first and one in the second carrier)
Adding TN775 Maintenance circuit pack
Replacing the TDM cables with new WP91716 L1 and L2 TDM/LAN cables
Adding and restructuring the port circuit packs as required
Adding two TN776 Expansion Interface circuit packs (one in the first port carrier in the
EPN Cabinet and one in the second)
Two TN776 Expansion Interface circuit packs are needed in the PPN Cabinet as well. Two fiber
links are required to connect the Expansion Interface circuit packs.
137