Insys ISDN Terminal Adapter 4.0 11-02-01-02-00.015 Manuale Utente
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11-02-01-02-00.015
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Operating Manual INSYS ISDN TA 4.0
Version 2.02 – 01.04
9 ISDN Information
9.1 Abbreviations For ISDN Service Features
Abbreviation Description
AOCD
Advice of charge during the call
AOCE
Advice of charge at the end of the call
CCBS
Completion of calls to busy subscribers
CFB
Call forwarding busy
CFNR
Call forwarding no reply
CFU
Call forwarding unconditional
CLI (CLIP)
Call line identification presentation
CLIR
Call line identification restriction
COLP
Connected line identification presentation
COLR
Connected line identification restriction
CW Call
waiting
9.2 Protocols And Channels
9.2.1 D channel
The D channel (data channel) transfers control information, like call numbers, units, ser-
vices, etc. within the ISDN.
The D channel is a signaling channel.
The transmission of control and management information before, during, and after the
connection takes place here.
The transmission speed at the basic rate interface is 16 kbit/s, and for the primary rate
interface it is 64 kbit/s. The available D channel is used for the signaling information of
all existing B channels.
The D channel protocol is a fixed standard, which transmits control and management
information of the connections.
The D channel protocol is referred to as DSS1 in Euro ISDN. It is an adaptive HDLC proto-
col.
vices, etc. within the ISDN.
The D channel is a signaling channel.
The transmission of control and management information before, during, and after the
connection takes place here.
The transmission speed at the basic rate interface is 16 kbit/s, and for the primary rate
interface it is 64 kbit/s. The available D channel is used for the signaling information of
all existing B channels.
The D channel protocol is a fixed standard, which transmits control and management
information of the connections.
The D channel protocol is referred to as DSS1 in Euro ISDN. It is an adaptive HDLC proto-
col.