| PSTN
vs. ISDN user access |
|
|
| 300 … 3400 Hz
analogue transmission band |
|
| “poor-performance”
subscriber signaling |
|
| PSTN |
|
|
|
|
|
| Basic |
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| Rate |
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| Access |
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| ISDN |
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|
|
|
|
| 2 x 64 kbit/s
digital channels (B channels) |
|||
| 16 kbit/s
channel for signaling (D channel) |
|||
| 30 x 64 kbit/s
digital channels (B channels) |
|||
| 64 kbit/s
channel for signaling (D channel) |
|||
| concatenation of B
channels possible |
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|
|
|
|
|
|
|
| Primary |
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| Rate |
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| Access |
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| ISDN |
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