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Country Differences
D-2 Issue 1 September 1995
*PPM means Periodic Pulse Metering.
Table D-1. United States and Canada
United States & Canada
Tone Detector TN2182 TN744C TN748D
Tone-Clock TN2182 TN780 TN768
Call Classifier TN744C TN2182 TN744B
R2MFC Circuit Not Applicable
Speech Synthesizer TN725B
Announcement TN750C TN750B
Auxiliary Trunk TN763D
Analog Direct Inward Dialed (DID) Trunk TN753
Analog Central Office Trunk (no PPM) * TN747B
Analog Central Office Trunk (w/PPM) * Not Applicable
4 Wire Tie Trunk TN760D
2 Wire Tie Trunk Not Applicable
Digital Central Office (CO)/Direct Inward
Dialed (DID) Trunk
TN464F TN464E TN464D TN767
Digital Tie Trunk TN464F TN464E TN464D TN767 TN722B
Digital Integrated Services Digital
Network (ISDN) Central Office Trunk
TN464F TN464E TN464D TN767
8 port Analog Line TN742
16 port Analog Line TN746B
4 Wire Digital Line TN754B TN762B
2 Wire Digital Line TN2181
Data Line TN726B
Table D-2. Argentina
Argentina
Tone Detector TN744C TN2182 TN748D TN748C
Tone-Clock TN2182 TN780
Call Classifier TN744C TN2182 TN744B
R2MFC Circuit TN744C TN2182 TN744B
Speech Synthesizer TN725B