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2.1 ISDN Features
2.1 ISDN Features
Integrated Services Digital Network (ISDN)
Description
Integrated Services Digital Network (ISDN) is a hierarchy of digital switching and
transmission systems. ISDN transmits voice, data, and image in digital format. It is
synchronised so all digital elements speak the same language at the same speed.
[ISDN Interface]
ISDN provides the following two interfaces:
•Basic Rate Interface (BRI)
BRI provides two 64,000 bps B channels for data transmission and one 16,000 bps D channel
for signalling (2B + D).
•Primary Rate Interface (PRI)
PRI provides thirty 64,000 bps B channels for data transmission and one 64,000 bps D channel
for signalling (30B + D).
[System Hardware Requirements]
To interface the KX-TD500 System with ISDN, one of the following two trunk cards is
required depending on the ISDN interface type.
•KX-TD50288 (BRI Card) for Basic Rate Interface
•KX-TD50290 (PRI30 Card) for Primary Rate Interface
[Access Mode]
The KX-TD500 System can handle calls from ISDN with Point-to-Point (P-P) and / or Point-
to-MultiPoint (P-MP) access mode. The PRI30 Card (KX-TD50290) is available for P-P
access mode only.
Point-to-Point (P-P) access mode
A call from ISDN with DDI (Direct Dialling In) number is directed to a specific regular
extension (with DN) or virtual extension (with FDN) directly after translation of the DDI
number.
DDI (Direct Dialling In) Configuration
ISDN
Point-to-MultiPoint (P-MP) access mode
If Multiple Subscriber Number (MSN) service is contracted with the Central Office, up to eight
extensions and / or terminals can be connected to one ISDN BRI line. A different DN is
assigned to each extension or terminal. A call from ISDN is directed to a specific regular
328
Called No.
555-4112
TD500
Ext.112 (DDI:111)
Ext.212 (DDI:112)
Ext.312 (DDI:113)
Features Guide
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