
1.20 Integrated Services Digital Network (ISDN) Service Features
1.20Integrated Services Digital Network (ISDN) Service Features
1.20.1 Integrated Services Digital Network (ISDN)
1.20.1.1 Integrated Services Digital Network (ISDN)—SUMMARY
Description
ISDN is a digital switching and transmission network. ISDN transmits voice, data, and image in digital format. ISDN lines, if available, can be connected to public line (trunk), private line (QSIG), or ISDN terminal devices (extension).
1.ISDN Interface and Configuration
Interface Type | Description | Port Mode | Configuration | ||
Type* | |||||
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Basic Rate | Provides two 64 kbps B channels | Trunk, | |||
Interface (BRI) | for communication and one 16 | Extension | |||
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| kbps D channel for signalling (2B |
| multipoint | |
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| + D). |
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| QSIG (Master, | |||
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| Slave) |
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Primary Rate | Provides thirty or | Trunk, QSIG | |||
Interface (PRI) | kbps B channels for | (Master, Slave), |
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| communication and one 64 kbps | Extension |
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| D channel for signalling (30B + D/ |
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| 23B + D). |
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*: | BRI Configuration [426] *For BRI only |
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Note
One ISDN terminal device can be connected to one ISDN port.
Point-to-multipoint (P-MP):
A maximum of eight ISDN terminal devices can be connected to one ISDN port.