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*

 

 

 

 

Basic Rate

Provides two 64 kbps B channels

Trunk,

Point-to-Point/

Interface (BRI)

for communication and one 16

Extension

Point-to-

 

 

kbps D channel for signalling (2B

 

multipoint

 

 

+ D).

 

 

 

 

QSIG (Master,

Point-to-Point

 

 

 

 

 

 

Slave)

 

 

 

 

 

Primary Rate

Provides thirty or twenty-three 64

Trunk, QSIG

Point-to-Point

Interface (PRI)

kbps B channels for

(Master, Slave),

 

 

 

communication and one 64 kbps

Extension

 

 

 

D channel for signalling (30B + D/

 

 

 

 

23B + D).

 

 

 

 

 

 

 

*:

BRI Configuration [426] *For BRI only

 

 

Note

Point-to-Point (P-P):

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.

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