Zhone Technologies 600 - Manual (Page 153)

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.
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.
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.
Figure 6-1. ISDN Channels: 191B+D
1 Facility With 23B+D 7 Facilities With
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 + - + - + - R
G
R C
O
M VN VB VA
HSU- T 530/35 S 60 HSU-T 530/35 S 60 HSU-T 530/35 S 60 HSU-T 530/35 S 60 HSU-T 530/35 S 60 HSU-T 530/35 S 60 BRI HSU
530/35 S 60
P 2
P 1
P 4
P 3
FXO 8139
N O D E T E R M
C O M P
P 1
P 1
CPU
CLOCK NVRAM
W1-1
CSU W1-2
DSX
WA N
IF T1+DS1