| What
is ISDN ? |
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| 1. End-to-end digital connectivity |
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| 2. Enhanced subscriber signaling |
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| 3. A wide variety of new services (due to 1
and 2) |
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| 4. Standardized access interfaces and
terminals |
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| ISDN
is not a “new” network separated from the PSTN. |
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| Interworking
with “normal” PSTN equipment is very |
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| important. |
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| interaction is |
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| possible |
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| ISDN |
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| terminal |
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| PSTN |
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| terminal |
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