Zhone Technologies 900 ユーザーズマニュアル
Server Cards
6-3
ACS-PRI/BRI Card
Introduction
6.1.1.8
Trunks
An ISDN trunk is a logical division of B channels pertaining to a D channel. It consists of one
or more contiguous or non-contiguous B channels. All B channels in a trunk must belong to
the same D channel. However, a trunk may be assigned across different physical interfaces
when NFAS is used.
or more contiguous or non-contiguous B channels. All B channels in a trunk must belong to
the same D channel. However, a trunk may be assigned across different physical interfaces
when NFAS is used.
6.1.2
Selecting D Channels, B Channels, and DS0s
The D channel configuration screens described later in this chapter show how to configure D
channels, assign B channels to one or more D channels, and how to identify dedicated DS0s
that cannot be used as B channels. This section will give a few examples of applications that
would require various combinations of D channel(s), B channels, and DS0s.
channels, assign B channels to one or more D channels, and how to identify dedicated DS0s
that cannot be used as B channels. This section will give a few examples of applications that
would require various combinations of D channel(s), B channels, and DS0s.
Figure 6-1 shows an application where a single D channel performs ISDN signaling for 8 T1’s
worth of B channels (191 B+D). There are actually 8 separate T1 facilities: seven with 24 B
channels each, and one with 23 B channels and one D channel.
worth of B channels (191 B+D). There are actually 8 separate T1 facilities: seven with 24 B
channels each, and one with 23 B channels and one D channel.
Figure 6-1. ISDN Channels: 191B+D
1 Facility With 23B+D
7 Facilities With
24B Each
24B Each
Carrier
ISDN Switch
IAD
CAUTION:
For contin
ued
protection a
gainst fire
,
replace onl
y with the same
type and rating of fuse
Premisys Comm
unications
, Inc.
Model IMA
CS/600
T 5A
250V
IEC
Fuse
5A SB
250V
UL/CSA
24/48V
5A
LISTED 9K09
LR 77063
120-200-240V
~
3A, 50 / 60 Hz
Telephone
Equipment
Class 2 P
ower Source
®
®
UL
+ -
+ -
+ -
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HSU-T
530/35
S 60
HSU-T
530/35
S 60
HSU-T
530/35
S 60
BRI
HSU
530/35
530/35
S 60
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2
P
1
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4
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3
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W1-2
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IF
IF
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