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Issue 1 September 1995
D-11
*PPM means Periodic Pulse Metering.
Auxiliary Trunk TN763D TN417
Analog Direct Inward Dialed (DID)
Trunk
TN2139
Analog Central Office (CO) Trunk (no
PPM *)
Not
Applicable
Analog Central Office (CO) Trunk
(w/PPM *)
TN2138
4 Wire Tie Trunk TN2140B TN2140
2 Wire Tie Trunk TN497
Digital Central Office (CO)/Direct
Inward Dialed (DID) Trunk
TN464F TN464E TN464D TN464C TN464B
Digital Tie Trunk TN464F TN464E TN464D TN464C TN464B
Digital Integrated Services Digital
Network (ISDN) Central Office (CO)
Trunk
Not
Applicable
8 port Analog Line
16 port Analog Line TN2183 TN2135
4 Wire Digital Line TN754B TN413
2 Wire Digital Line TN2181 TN2136
Data Line TN726B
Table D-11. Italy
Italy