Nortel 1000 Installation And Commissioning Manual page 52

52 ISDN Primary Rate Interface equipment overview
Clock configurations
Clock Controllers can be used in a single or a dual CPU system.
A single CPU system has one Clock Controller card. This card can receive
reference clocks from two sources referred to as the primary and secondary
sources. These two sources can originate from a PRI2, DTI2, etc. PRI2
cards such as the NT8D72BA are capable of supplying two references of
the same clock source. These are known as Ref1 (available at J1) and Ref2
(available at J2) on the NT8D72BA.
The NT5D12 card is capable of supplying two references from each clock
source, i.e., four references in total. NT5D12 can supply Clk0 and Clk1 from
Unit 0 and Clk0 and Clk1 from Unit 1. Either Unit 0 or Unit 1 can originate
primary source, as shown in
54)
Figure 18 "Clock Controller primary and secondary tracking" (page 50)
Figure 22 "Clock Controller - Option 4" (page
There is one Clock Controller cable required for the DDP2 card, which
is available in four sizes; this is the NTCG03AA/AB/AC/AD. Refer to
"Reference clock cables" (page 45)
Table 13 "Clock Controller options - summary" (page 52)
clocking options.
53)
Table 13
Clock Controller options - summary
CC Option
Option 1
Option 2
Option 3
Option 4
Copyright © 2003-2007, Nortel Networks
.
through Figure 22 "Clock Controller - Option 4" (page 57)
Table 14 "Clock Controller options - description" (page
explains the options in more detail.
CPU Type
Single
Dual
Dual
Dual
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
Figure 19 "Clock Controller - Option 1" (page
57).
for more information.
Notes
Ref from P0 on Clk0
Ref from P1 on Clk0
Ref from P0 on Clk0
Ref from P0 on Clk1
Ref from P1 on Clk0
Ref from P1 on Clk1
Ref from P0 on Clk0
Ref from P0 on Clk1
Ref from P1 on Clk0
Ref from P1 on Clk1
on pages
to
summarizes the