Panasonic KX-TD500, Руководство по функциям

Страница: 350 / 398

ISDN Features
350 Features Guide
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
synchronized 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 2 B channels (64 kbps for each) for data transmission and 1 D channel (16 kbps)
for signaling (2B + D).
•
Primary Rate Interface (PRI)
PRI provides 23 B channels (64 kbps for each) for data transmission and 1 D channel (64 kbps)
for signaling (23B + 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 (PRI23 Card) for Primary Rate Interface
[Access Mode]
The KX-TD500 System can handle calls from ISDN with Point-to-Point (P-P) or Point-to-
MultiPoint (P-MP) access mode or both. The PRI23 Card (KX-TD50290) is available for P-P
access mode only.
Point-to-Point (P-P) access mode
A call from ISDN with DID (Direct Inward Dialing) number is directed to a specific regular
extension (with DN) or virtual extension (with FDN) directly after translation of the DID
(ISDN) number.
DID (Direct Inward Dialing) (ISDN) Configuration
Point-to-MultiPoint (P-MP) access mode
If Multiple Directory Number (MDN) service is contracted with the Central Office, up to eight
extensions or terminals or both 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
Ext.1112 (DID:1111)
Ext.1212 (DID:1112)
Ext.1312 (DID:1113)
ISDN
Called No.
555-1111 - 1113
TD500