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| Spain |
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| Taiwan |
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| Speech |
| TN457 |
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| TN725B |
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| Synthesizer |
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| Announcement |
| TN750C | TN750B |
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| TN750C | TN750B |
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| Auxiliary Trunk |
| TN763D |
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| TN763D | TN763C |
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| Analog Direct |
| Not |
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| TN753 |
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| Inward Dialed |
| Applicable |
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| (DID) Trunk |
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| Analog Central |
| TN2147C |
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| TN747B |
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| Office (CO) |
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| Trunk (no PPM *) |
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| Analog Central |
| TN465C |
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| Office (CO) |
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| Trunk (w/PPM *) |
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| 4 Wire Tie Trunk |
| Not |
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| TN760D |
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| Applicable |
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| 2 Wire Tie Trunk |
| Not |
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| Applicable |
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| Digital Central |
| TN464F | TN464E |
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| Office |
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| (CO)/Direct |
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| Inward Dialed |
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| (DID) Trunk |
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| Digital Tie Trunk |
| TN464F |
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| TN464F | TN464E | TN464D | TN464C | TN767 |
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| Digital |
| TN464F | TN464E |
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| Not |
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| Integrated |
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| Applicable |
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| Services Digital |
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| Network (ISDN) |
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| Central Office |
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| (CO) Trunk |
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| 8 port Analog |
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| TN742 |
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| Line |
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| 16 port Analog |
| TN2183 | TN2180 |
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| TN746B |
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| Line |
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| 4 Wire Digital |
| TN754B |
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| TN754B |
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| Line |
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| 2 Wire Digital |
| TN2181 |
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| TN2181 |
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| Line |
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| Data Line |
| TN726B |
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| TN726B |
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*PPM means Periodic Pulse Metering.